List species and varieties by family
Aetideidae Giesbrecht, 1892 ( Clausocalanoidea )
(1) Aetideopsis Sars, 1903 ( Aetideinae )
Rem.: type: Aetideopsis rostrata Sars,1903.
12 spp. + 1 indet.

[1] Aetideopsis albatrossae  Shih & Maclellan, 1981   (F, juv.M)    [Figs]

[2] Aetideopsis antarctica  (Wolfenden, 1908)   (F,M)    [Figs]

[3] Aetideopsis armata  (Boeck, 1872)   (F,M)    [Figs]

[4] Aetideopsis browsei  McKinnon, Corley & Duggan, 2011   (F)    [Figs]

[5] Aetideopsis carinata  Bradford, 1969   (F,M)    [Figs]

[6] Aetideopsis cristata  Tanaka, 1957   (F,M)    [Figs]

Aetideopsis divaricata    Esterly, 1911   (F)
Syn.: ? A. trichechus Vervoort, 1949 (p.7)
Ref.: Esterly, 1911 (p.316, Descr.F, figs.F); Sewell, 1948 (p.555, 562); Vervoort, 1963 b (p.124, Rem.); Bradford & Jillett, 1980 (p.19); Markhaseva, 1996 (p.42, Rem.)
Loc: Californie (San Diego), Afr. SE (in De Decker & Mombeck, 1964 (p.11)
Lg.: (143) F: 3,36
Rem.: Cf. Aetideopsis rostrata

Aetideopsis divergens    Tanaka, 1957   (F,M)
Syn.: A. rostrata : Tanaka & Omori, 1970 (p.112)
Ref.: Tanaka, 1957 a (p.40, figs.F,M); Bradford & Jillett, 1980 (p.19); Markhaseva, 1996 (p.42, Rem.)
Loc: Japon ( Izu)
Lg.: (39) F: 3,01; M: 3,13
Rem.: Cf. Aetideopsis rostrata

Aetideopsis inflata    Park, 1978   (F)
Ref.: Park, 1978 (p.118, Descr.F, figs.F); Markhaseva, 1996 (p.42, Rem.)
Loc: Antarct. (Pacif.), Namibie (in Carola, 1993)
Lg.: (20) F: 3,64
Rem.: Cf. Aetideopsis rostrata

Aetideopsis magna    Grice & Hulsemann, 1970   (M)
Ref.: Grice & Hulsemann, 1970 (p.188, Descr.M, figs.M); Bradford, 1976 a (p.9); Bradford & Jillett, 1980 (p.19, 74, Rem.)
Loc: off Woods Hole S
Lg.: (200) M: 4,56-4,2
Rem.: ? Cf. Pseudotharybis magnus

[7] Aetideopsis minor  (Wolfenden, 1911)   (F)    [Figs]

Aetideopsis modesta    With, 1915   (F)
Syn.: Chiridius modestus With, 1915 (p.82, Descr.F, figs.F)
Ref.: Vervoort, 1957 (p.53); Bradford & Jillett, 1980 (p.19); Markhaseva, 1996 (p.36, Rem.)
Loc: off Islande
Lg.: (7) F: 3,69
Rem.: Cf. Aetideopsis minor

[8] Aetideopsis multiserrata  (Wolfenden, 1904)   (F,M)    [Figs]

Aetideopsis nasuta    With, 1915   (F)
Syn.: Chiridius nasutus With, 1915 (p.81, Descr.F, figs.F)
Ref.: Vervoort, 1957 (p.53); 1963 b (p.123); Bradford, 1972 (p.38); Park, 1978 (p.111); Bradford & Jillett,1980 (p.19); Markhaseva, 1996 (p.37, Rem.)
Loc: Atlant. NE (off Ecosse W, off Islande S)
Lg.: (7) F: 2,88
Rem.: Cf. Aetideopsis multiserrata

Aetideopsis pacifica    Esterly, 1911   (F)
Ref.: Esterly, 1911 (p.315, Descr.F, figs.F); Sewell, 1948 (p.555, 562); Vervoort, 1957 (p.53, Rem.); Bradford, 1972 (p.38); Bradford & Jillett, 1980 (p.19); Markhaseva, 1996 (p.37, Rem.)
Loc: San Diego (Californie)
Lg.: (143) F: 3,18
Rem.: Cf. Aetideopsis multiserrata

Aetideopsis rakuma    Zvereva, 1977   (F)
Ref.: Zvereva, 1977 (p.6, Descr.F, figs.F); Bradford & Jillett, 1980 (p.19, 21)
Loc: Mer d'Okhotsk
Rem.: Cf. Bradyidius rakuma

[9] Aetideopsis retusa  Grice & Hulsemann, 1967   (F,M)    [Figs]

[10] Aetideopsis rhinoceros  McKinnon, Corley & Duggan, 2011   (F,M)    [Figs]

[11] Aetideopsis rostrata  Sars, 1903   (F,M)    [Figs]

Aetideopsis trichechus    Vervoort, 1949   (juv. F)
Ref.: Vervoort, 1949 (p.7, Descr.F, figs.F); 1957 (p.53, Rem.); 1963 b (p.123, Rem.); Tanaka & Omori, 1970 (p.114, Rem.); Bradford & Jillett, 1980 (p.19: comme trichecus ); Markhaseva, 1996 (p.42, Rem.)
Loc: Indien E, Pacif.
Lg.: (41) F: 3,38
Rem.: Cf. Aetideopsis rostrata

[12] Aetideopsis tumorosa  Bradford, 1969   (F,M)    [Figs]

[13] Aetideopsis sp.  Bradford, 1972   (F)    [Figs]

Aetideopsis sp.    Unterüberbacher, 1964   (F)
Ref.: Unterüberbacher,1964 (p.21, figs.F)
Loc: Namibie (Walvis Bay)
Rem.: Cf. Aetideopsis carinata
(2) Aetideus Brady, 1883 ( Aetideinae )
Rem.: type: Pseudocalanus armatus Boeck,1872. 11 spp.
On the basis of the females Bradford (1971) concluded that the only difference between Snelliaetideus Vervoort, 1949 and Aetidius Brady, 1883 was the absence of postero-lateral thoracic points. According to Roe (1975, p.305) the discovery of A. arcuatus male confirms Bradford’s opinion and SnelliaetideusAetideus.

[1] Aetideus acutus  Farran, 1929   (F,M)    [Figs]

[2] Aetideus arcuatus  (Vervoort, 1949)   (F,M)    [Figs]

[3] Aetideus armatus  (Boeck, 1872)   (F,M)    [Figs]

Aetideus armatus    Brady, 1883   (F,[non M])
Syn.: Aetidius armatus Brady, 1883 (p.76, figs.F,M); Thompson, 1888 d (p.142)
Ref.: Sars, 1901 a (1903) (p.26: Rem.); Esterly, 1905 (p.145, figs.F); Lysholm, 1913 (p.5); Vervoort, 1957 (p.45, Rem.); Chiba & al., 1957 a (p.12)
Loc: G. de Guinée, Norvège, Médit. (Malte), Indien, mers de Chine, Californie
Rem.: [M] non identifiable; Cf. (part.) Aetideus armatus (F) (Boeck,1872) & ? Aetideus pseudarmatus (F), Aetideus bradyi (F)

Aetideus atlanticus    Calef & Grice, 1965   (F)
Ref.: Calef & Grice, 1965 (p.634, Descr.F, figs.F); Bradford, 1971 (p.32)
Loc: Brésil (NE)
Rem.: Cf. Paivella inaciae

[4] Aetideus australis  (Vervoort, 1957)   (F,M)    [Figs]

[5] Aetideus bradyi  A. Scott, 1909   (F, ?M)    [Figs]

[6] Aetideus divergens  Bradford, 1971   (F,M)    [Figs]

[7] Aetideus giesbrechti  Cleve, 1904   (F,M)    [Figs]

Aetideus mediterraneus    Steuer, 1910   (F)
Ref.: Steuer, 1910 a (p.23, Rem.F)
Loc: Adriatique (Dubrovnik)
Rem.: Espèce douteuse. ? Cf. Aetideus giesbrechti

[8] Aetideus mexicanus  Park, 1974   (F,M)    [Figs]

[9] Aetideus pacificus  Brodsky, 1950   (F,M)    [Figs]

[10] Aetideus pseudarmatus  Bradford, 1971   (F)    [Figs]

Aetideus tenuirostris    Wolfenden, 1903   
Ref.: Wolfenden, 1904 (p.116, Rem.); Vervoort, 1957 (p.45, Rem.)
Rem.: Cf. Aetideus armatus (Boeck,1872)

[11] Aetideus truncatus  Bradford, 1971   (F,M)    [Figs]

Aetideus sp.    Brodsky, 1955   (F)
Ref.: Brodsky, 1955 a (p.188, figs.F)
Loc: Kouriles-Kamtchatka
Rem.: Cf. Bradyidius sp.
(3) Azygokeras Koeller & Littlepage, 1976
Rem.: type: Azygokeras columbiae . 1 sp.:

[1] Azygokeras columbiae  Koeller & Littlepage, 1976   (F,M)    [Figs]
(4) Batheuchaeta Brodsky, 1950 ( Euchirellinae )
Rem.: type: Batheuchaeta lamellata Brodsky,1950. 9 spp.:

[1] Batheuchaeta anomala  Markhaseva, 1981   (F,M)    [Figs]

[2] Batheuchaeta antarctica  Markhaseva, 1986   (F)    [Figs]

Batheuchaeta brodskyi    Markhaseva, 1981   (F)
Ref.: Batheuchaeta gurjanova

Batheuchaeta enormis    Grice & Hulsemann, 1968   (F)
Ref.: Grice & Hulsemann, 1968 (p.323, Descr.F, figs.F, tab.2); Bradford & Jillett, 1980 (p.21); Vaupel Klein, 1984 a (p.50)
Loc: Pacif. SE (off Is. Juan Fernandez E)
Rem.: Cette forme n'appartient pas à ce genre. Cf.? (voir spp. inc. sedis)

[3] Batheuchaeta gurjanovae  (Brodsky, 1955)   (F,M)    [Figs]

[4] Batheuchaeta heptneri  Markhaseva, 1981   (F)    [Figs]

[5] Batheuchaeta lamellata  Brodsky, 1950   (F,M)    [Figs]

[6] Batheuchaeta peculiaris  Markhaseva, 1983   (F,M)    [Figs]

[7] Batheuchaeta pubescens  Markhaseva, 1986   (F)    [Figs]

[8] Batheuchaeta tuberculata  Markhaseva, 1986   (F)    [Figs]
(5) Bradyetes Farran, 1905
Rem.: Type: Bradyetes inermis Farran,1905. This genus could be synonym of Pseudeuchaeta (in Sewell, 1947), which is undermined by Grice (1972 a)
6 spp.

Bradyetes brevis    Farran, 1936   (F)
Ref.: Farran, 1936 b (p.238, Descr.F, figs.F); Sewell, 1948 (p.495); Vervoort, 1952 b (n°43, p.3, figs.F); Markhaseva, 1996 (p.62, 226, Rem.)
Loc: Arct. (Groenland E), Mer de Barents, off Cap Cod (S)
Rem.: Cf. Jaschnovia brevis

[1] Bradyetes curvicornis  Markhaseva & Schulz, 2006   (F)    [Figs]

Bradyetes florens    Grice & Hulsemann, 1967   (F)
Ref.: Grice & Hulsemann, 1967 (p.23, Descr.F, figs.F); Bradford & Jillett, 1980 (p.21, Rem.)
Loc: Indien
Rem.: Cf. ? Bathypontiidae (voir spp. inc. sedis)

[2] Bradyetes inermis  Farran, 1905   (F,M)    [Figs]

Bradyetes major    Sars, 1907   (F)
Ref.: Sars, 1907 a (p.9, Rem.F)
Rem.: Cf. Pseudochirella fallax

[3] Bradyetes matthei  Johannessen, 1976   (F,M)    [Figs]

[4] Bradyetes pacificus  Ohtsuka, Boxshall & Shimomura, 2005   (F)    [Figs]

[5] Bradyetes weddellanus  Markhaseva & Schulz, 2006   (F)    [Figs]
(6) Bradyidius Giesbrecht, 1897 ( Aetideinae )
Rem.: Type: Bradyidius armatus Giesbrecht,1897. 16 spp. (of which 1 doubtful) + 2 unidentified.
Ten species are compared in Bradford, 1976 (table1, p.6).

Diagnosis after Vives & Shmeleva (2007, p.549) :
- Forehead without crest.
- Rostrum , strong, bifurcate, showing points being or no diverging.
- Cephalosome and 1st thoracic segment fused, segments thoracic 4 and 5 fused..
- Posterior corners of the prosome elongated ending in points.
- A1 as long as the prosome.
- Outer spines of the 2nd exopodal segment of P1 larger than the 1st segment. Endopod with 1 segment showing an outer lobe well developed.
- Endopod of P2 2-segmented, exopod 3-segmented.
- Basipodites of P1-P4 with generalemente groups of spinules on surfaces.

- Crest absent.
- Rostrum as female, but parallel rami..
A1 whether short and not reaching end of the 2nd thoracic segment or exceeding the caudal rami;
- P5 unramous or biramous; in the first instance both rami are equal, in the second instance, endopod has only 1 segment (rarement 2) and generally styliform.

[1] Bradyidius angustus  (Tanaka, 1957)   (M)    [Figs]

[2] Bradyidius armatus  Giesbrecht, 1897   (F,M)    [Figs]

[3] Bradyidius arnoldi  Fleminger, 1957   (F,M)    [Figs]

Bradyidius bradyi    Sars, 1884   (F,M)
Syn.: Pseudocalanus armatus : Brady,1878 (p.46); Bradyidius armatus Giesbrecht, 1897;Undinopsis bradyi Sars, 1884; 1902 (1903) (p.32)
Ref.: Matthews, 1964 (p.18); Markhaseva, 1996 (p.70)
Rem.: Cf. Bradyidius armatus

Bradyidius brevispinus    Bradford, 1969   (F)
Ref.: Bradford, 1969 b (p.479, Descr.F, figs.F); 1976 a (p.9); Bradford & Jillett, 1980 (p.21,74)
Loc: Nouvelle-Zélande (NE)
Rem.: Cf. Pseudotharybis brevispinus

[4] Bradyidius capax  Bradford-Grieve, 2003   (F)    [Figs]

[5] Bradyidius curtus  Markhaseva, 1993   (F)    [Figs]

Bradyidius dentatus    Bradford, 1969   (M)
Ref.: Bradford, 1969 (p.481, Descr.M, figs.M); 1976 a (p.9); Bradford & Jillett, 1980 (p.74, figs.M)
Loc: Nouvelle-Zélande (NE)
Rem.: Cf. Pseudotharybis dentatus

[6] Bradyidius hirsutus  Bradford, 1976   (F,M)    [Figs]

[7] Bradyidius luluae  Grice, 1972   (F,M)    [Figs]

[8] Bradyidius pacificus  (Brodsky, 1950)   (F,M)    [Figs]

[9] Bradyidius plinioi  Campaner, 1978   (F,M)    [Figs]

Bradyidius plinioi minor    Campaner, 1978   (F)
Rem.: Cf. Bradyidius plinioi

Bradyidius plinioi plinioi    Campaner, 1978   
Rem.: Cf. Bradyidius plinioi

[10] Bradyidius rakuma  (Zvereva, 1977)   (F)    [Figs]

Bradyidius robustus    Bradford, 1969   (F,M)
Ref.: Bradford, 1969 b (p.476, figs.F,M); Bradford, 1976 a (p.9); Bradford & Jillett, 1980 (p.21,74)
Rem.: Cf. Pseudotharybis robustus

[11] Bradyidius saanichi  Park, 1966   (F,M)    [Figs]

[12] Bradyidius similis  (Sars, 1902)   (F,M)    [Figs]

Bradyidius spinatus    Bradford, 1969   (F,M)
Ref.: Bradford, 1969 b (p.484 : lapsus calami ); 1976 a (p.9); Bradford & Jillett, 1980 (p.21)
Rem.: Cf. Parabradyidius spinibasis

Bradyidius spinibasis    Bradford, 1969   
Syn.: Bradyidius spinatus Bradford, 1969 b (p.484)
Ref.: Bradford, 1969 b (p.481, figs. juv.F,M); Bradford & Jillett, 1980 (p.21, 74, figs.F,M)
Loc: Nouvelle-Zélande (N)
Rem.: Cf. Parabradyidius spinibasis

[13] Bradyidius spinifer  Bradford, 1969   (F,M)    [Figs]

[14] Bradyidius styliformis  Othman & Greenwood, 1987   (F,M)    [Figs]

[15] Bradyidius subarmatus  Markhaseva, 1993   (F,M)    [Figs]

[16] Bradyidius tropicus  Wolfenden, 1905   (F)

Bradyidius sp.    Bradford, 1972   (F)
Ref.: Bradford, 1972 (p.38, figs.F)
Lg.: (116) F: 2,5
Rem.: Cf. Bradyidius spinifer

[17] Bradyidius sp.  Brodsky, 1955   (F)

[18] Bradyidius sp.  Greenwood, 1977   (F)    [Figs]
Bryaxis Sars, 1902 ( Aetideinae )
Rem.: Genusname established by Boeck,1872, but not published by this author. Cf. Comantenna (part.) & Paracomantenna (part.)
Bryaxis brevicornis    Sars, 1902   (F)
Ref.: Sars, 1902 (1903) (p.35, Descr.F, figs.F)
Loc: Norvège, Mer de Barents, Irlande
Rem.: Cf. Comantenna brevicornis
Bryaxis minor    Farran, 1905   (F)
Ref.: Farran, 1905 (p.32, Descr.F, figs.F); Bradford & Jillett, 1980 (p.29)
Loc: Atlant. NE
Rem.: Cf. Paracomantenna minor
(7) Chiridiella G.O. Sars, 1907
Rem.: Type: Chiridiella macrodactyla Sars,1907. 18 spp.:

Diagnosis from Deevey (1974), after Bradford (1971) to, include 16 species..
- Body usually short and thick, with anterior part rather swollen.
- Forehead rounded, no trace of rostrum.
- Head and 1st pedigerous segment separate, 4th and 5th thoracic segments fused.
)- Last metasomal segment rounded.
- Urosome usually very short.
- Genital segment female, strongly protuberant ventrally.
- Caudal rami short.
- A1 of 23 or 24 segments.
- A2 female rather short, exopodite longer than endopodite; male slightly larger than exopodite.
- Md females very large and strongly toothed, palp comparatively short; mandibular blade male reduced and probably useless, palp larger.
- Mx1 with endopodal part of palp little developed in female; reatly reduced in male.
- Mx2 female varyiing in structure from 5 or 6 lobes with spines and setae to 2 or 3 highly modified lobes with hooks and pincers; much reduced in male.
- Mxp with 2nd segment often elongate, terminal part very short.
- P1 with both rami 1-segmented.
- P2-P4 with 2- or 3-segmented exopods, 1- to 3-segmented endopods.
- P5 lacking in female.
- Male P5 as in Aetideidae, 1-segmented endopods larger on left leg.

[1] Chiridiella abyssalis  Brodsky, 1950   (F,M)    [Figs]

[2] Chiridiella atlantica  Wolfenden, 1911   (F)    [Figs]

[3] Chiridiella bichela  Deevey, 1974   (F, juv.M)    [Figs]

[4] Chiridiella bispinosa  Park, 1970   (F)    [Figs]

[5] Chiridiella brachydactyla  Sars, 1907   (F,?M)    [Figs]

[6] Chiridiella brooksi  Deevey, 1974   (F, juv.M)    [Figs]

[7] Chiridiella chainae  Grice, 1969   (F)    [Figs]

[8] Chiridiella gibba  Deevey, 1974   (F, juv.M)    [Figs]

[9] Chiridiella kuniae  Deevey, 1974   (F, juv.M)    [Figs]

[10] Chiridiella macrodactyla  Sars, 1907   (F)    [Figs]

[11] Chiridiella megadactyla  Bradford, 1971   (F)    [Figs]

[12] Chiridiella ovata  Deevey, 1974   (F)    [Figs]

[13] Chiridiella pacifica  Brodsky, 1950   (F,M)    [Figs]

Chiridiella reducta    Brodsky, 1950   (F,M)
Ref.: Brodsky, 1950 (1967) (p.194, figs.F,[non M], Rem.); Bradford, 1971 b (p.21, Rem.); Vidal, 1971 a (p.17, figs.F, [non M]); Markhaseva, 1983 (p.120, Rem.M)
Loc: Arct. (bassin central), Mer de Beaufort E
Lg.: (22) F: 2,4; M: 2,7; {F: 2,40; M: 2,70}
Rem.: Cf. Chiridiella abyssalis (M). Pour Markhaseva (1996, p.104) la femelle appartiendrait partiellement à Chiridiella pacifica : Cf. Chiridiella reductella

[14] Chiridiella reductella  Markhaseva, 1996   (F)    [Figs]

[15] Chiridiella sarsi  Markhaseva, 1983   (F)    [Figs]

[16] Chiridiella smoki  Markhaseva, 1983   (F)    [Figs]

[17] Chiridiella subaequalis  Grice & Hulsemann, 1965   (F)    [Figs]

[18] Chiridiella trihamata  Deevey, 1974   (juv. F)    [Figs]
(8) Chiridius Giesbrecht, 1892 ( Aetideinae )
Rem.: Type: Chiridius poppei Giesbrecht,1892. Not all authors admit the synonymy between Chiridius et Pseudaetideus. 8 spp. :

Chiridius armatus    Boeck, 1872   (F,M)
Syn.: Euchaeta armata Boeck, 1872; Pseudaetideus armatus Wolfenden, 1904 (p.115); van Breemen, 1908 a (p.32); Brodsky, 1950 (1967) (p.157); Vervoort, 1952 c (n°44, p.3); 1963 b (p.125); non C. armatus : Sars, 1900 (p.64)
Ref.: Sars, 1901 a (1903) (p.27, figs.F,M); Markhaseva, 1996 (p.27, Rem.)
Rem.: Cf. Aetideopsis armata

Chiridius brevicaudatus    Sars, 1907   (F)
Ref.: Sars, 1907 a (p.7)
Loc: Canaries S, G. du Mexique, Féroé, Indien W, Philippines, Chili
Rem.: Cf. Gaidius brevicaudatus

Chiridius brevispinus    Sars, 1900   (F)
Syn.: Gaidius major Wolfenden,1904 (p.114, figs.F)
Ref.: Sars, 1900 (p.68, Descr.F, figs.F); Markhaseva, 1996 (p.187, Rem.)
Loc: Arct.
Rem.: Cf. Gaidius brevispinus

Chiridius carnosus    Tanaka, 1957   (M)
Ref.: Tanaka, 1957 a (p.55, Descr.M, figs.M); Bradford & Jillett, 1980 (p.23); Markhaseva, 1996 (p.119, Rem.)
Loc: Japon (Sagami)
Rem.: Cf. Chiridius pacificus

[1] Chiridius gracilis  Farran, 1908   (F,M)    [Figs]

[2] Chiridius longispinus  Tanaka, 1957   (M)    [Figs]

[3] Chiridius mexicanus  Park, 1975   (F)    [Figs]

Chiridius modestus    With, 1915   (F)
Ref.: With, 1915 (p.82, Descr.F, figs.F); Markhaseva, 1996 (p.32, Rem.)
Loc: Atlant. N
Rem.: Cf. Aetideopsis minor

[4] Chiridius molestus  Tanaka, 1957   (F,M)    [Figs]

Chiridius nasutus    With, 1915   (F)
Ref.: With, 1915 (p.81, Descr.F, figs.F); Tanaka, 1957 a (p.37); Vervoort, 1963 b (p.123, Rem.); Bradford & Jillett, 1980 (p.19); Markhaseva, 1996 (p.32)
Loc: Atlant. N
Rem.: Cf. Aetideopsis multiserrata

[5] Chiridius obtusifrons  Sars, 1902   (F,M)    [Figs]

[6] Chiridius pacificus  Brodsky, 1950   (F,M)    [Figs]

[7] Chiridius polaris  Wolfenden, 1911   (F,M)    [Figs]

[8] Chiridius poppei  Giesbrecht, 1892   (F,M)    [Figs]

Chiridius subantarcticus    Park, 1978   (F)
Ref.: Park, 1978 (p.125, figs.F); Markhaseva, 1996 (p.119, Rem.)
Loc: Antarct., sub-Antarct. (Pacif.)
Lg.: (20) F: 3,44; 3,36
Rem.: Cf. Chiridius polaris

Chiridius subgracilis    Park, 1975   (F,M)
Ref.: Park, 1975 b (p.285, figs.F,M); Bradford & Jillett, 1980 (p.23, figs.F,M); Mazzocchi & al., 1995 (p.143, figs.F,M, Rem.); Markhaseva, 1996 (p.113, 114, Rem.); Boxshall & Halsey, 2004 (p.59: fig.M)
Loc: G. du Mexique, Mer de Tasman, Nouvelle-Zélande, Détr. de Magellan
Rem.: mésopélagique . Les mâles de C. molestus et subgracilis semblent identiques, mais ni Park ni Bradford & Jillett ne font de cette espèce un synonyme junior de la première. Cf. Chiridius molestus

Chiridius tenuispinus    Sars, 1900   (F,M)
Syn.: Gaidius boreale Wolfenden, 1902 (p.365); G. borealis Wolfenden, 1904 (p.131); Gaetanus tenuispinus : Park, 1975 a (p.11,30, figs.F,M)
Ref.: Sars, 1900 (p.67, Descr.F, figs.F); Vervoort, 1957 (p.58)
Loc: Arct., Antarct., G. du Mexique
Rem.: Cf. Gaetanus tenuispinus

Chiridius vanhöffeni    Wolfenden, 1904   (M)
Syn.: Pseudocalanus armatus : Vanhöffen,1897
Ref.: Wolfenden, 1904 (p.117, figs.M); van Breemen, 1908 a (p.35, Rem.)
Lg.: (229) M: 3,1
Rem.: Cf. Chiridius obtusifrons

Chiridius sp.    Tanaka, 1937   (Juv. M)
Ref.: Tanaka, 1937 (p.256, figs. juv.5M)
Loc: Japon (Suruga Bay)
Lg.: (128) juv.M: 2,05
Rem.: Cf. Chiridius gracilis
(9) Chirundina Giesbrecht, 1895 ( Euchirellinae )
Rem.: Type: Chirundina streetsii Giesbrecht,1895. 3 spp. + 1 doubtful:

Chirundina abyssalis    With, 1915   (F)
Syn.: Chirudina abyssalis With, 1915 (p.147, Descr.F, figs.F)
Loc: Atlant. N
Rem.: Cf. Pseudochirella obtusa

[1] Chirundina alaskaensis  (Tanaka, 1969)   (F)    [Figs]

Chirundina angulata    Sars, 1905   (F)
Ref.: Sars, 1905 b (p.13)
Rem.: Cf. Undeuchaeta major

Chirundina antarctica    Wolfenden, 1911   (F)
Ref.: Wolfenden, 1911 (p.243, Descr.F, figs.F); Sewell, 1948 (p.574); Park, 1978 (p.176, Rem.); Bradford & Jillett, 1980 (p.27)
Loc: Antarct. (continent, secteur Indien)
Lg.: (10) F: 6
Rem.: Espèce considérée comme douteuse par certains auteurs.

[2] Chirundina indica  Sewell, 1929   (F,M)    [Figs]

Chirundina magna    Wolfenden, 1911   (F,M)
Ref.: Wolfenden, 1911 (p.241, Descr.F, figs.F); Park, 1978 (p.176, Rem.); Bradford & Jillett, 1980 (p.66, Rem.); Markhaseva, 1996 (p.135, Rem.)
Loc: Atlant. S
Rem.: Cf. Chirundinella magna

Chirundina parvispina    Farran, 1908   (juv. M)
Syn.: Gaidius parvispinus Farran, 1908 b (p.34, Descr. juv.M, non F, figs. juv.M, non F); non C. parvispina : With, 1915 (p.151, figs.juv., M); Rose, 1933 a (p.107, figs.M);
Ref.: Bradford, 1980 (p.66); Vives, 1982 (p.291); Markhaseva, 1996 (p.275)
Loc: G. de Gascogne, off Maroc-Mauritanie
Lg.: (7) M: 5,28; (24) juv.M: 4,9
Rem.: Cf. Pseudochirella cryptospina

[3] Chirundina streetsii  Giesbrecht, 1895   (F,M)    [Figs]
(10) Chirundinella Tanaka, 1957 ( Euchirellinae )
Rem.: Diagnose after Tanaka (1957, p.197): Female
- Cephalothorax elongate, ovate.
- Head and 1st pediger segment separate, 4th and 5th pediger segments fused.
- Head with a median crest.
- Rostrum one-pointed.
- Abdomen 4-segmented in female.
- Outer marginal seta of caudal rami short; appendicular seta very long.
- A1 24-segmented, segments 8-9 fused, 24-25 separte.
- A2 exopod longer than endopod.
- Md with a small endopod, slightly longer than half the length of exopod; biting part robust.
- Mx1 with 4 setae on 2nd basal segment; 10 setae on endopod.
- Mx2 and Mxp resemble those of Pseudochirella
- P1 exopod 3-segmented, endopod 2-segmented.
P3 and P4 each exopod and endopod 3-segmented.
- P4 with a row of bristles on inner margin of coxa.
P5 female absent.
- Male unknown.
Male describes by Vervoort 1949 as Pseudochirella magna.

Chirundinella cara    Tanaka, 1957   (F)
Ref.: Tanaka, 1953 (p.131: nom. nud.); 1957 b (p.197, Descr.F, figs.F); Grice & Hülsemann, 1967 (p.23, fig.F, Rem.)
Loc: Japon (Izu), Indien W
Rem.: Cf. Chirundinella magna

[1] Chirundinella magna  (Wolfenden, 1911)   (F,M)    [Figs]
(11) Comantenna Wilson, 1924 ( Aetideinae )
Rem.: type: Bryaxis brevicornis . 5 spp. :

[1] Comantenna brevicornis  (Sars, 1902)   (F,M)    [Figs]

[2] Comantenna crassa  Bradford, 1969   (F)    [Figs]

[3] Comantenna curtisetosa  Alvarez, 1986   (F)    [Figs]

[4] Comantenna gesinae  Schulz, 2002   (F)    [Figs]

[5] Comantenna recurvata  Grice & Hülsemann, 1970   (F)    [Figs]
(12) Crassantenna Cole, Green, Croft & Rawlins, 1972 ( Aetideinae )
Rem.: Type: Crassantenna comosa. The swimming feet are not intact in the two species being the origin of this genus. Total: 2 spp.

Diagnosis from Bradford (1969, p.493) :
- head and 1st thoracic segment fused (with fusion line visible dorsally), 4yj and 5th thoracic segments fused.
- Posterior borders of prosome up-yurned.
- Genital segment slightly swollen anteriorly;
- Small single rostrum.
- A1 24-segmented, reaching at least thoracic segment 3, and covered with annulate setae.
- A2 with thick squat endopod, 2 setae on segment 2 of exopod; segment 1 of exopod with or without 2 setae.
- Md palp large with small endopod.
- Mx1, inner lobe 1 with 12 spines and setae.
- Mx2 with lobe 5 enlarged.
- Mxp basipod 1 short and thick with no sensory appendage distally.
- P1 endopod 1-segmented.
- P2 endopod 2-segmented, all other rami 3-segmented. External spines on exopods large. Terminal spines on exopods bear numerous sharp teeth. Exopod segments where external spine inserted not produced into spines externally.
- P5 absent.
- Male unknown.

[1] Crassantenna comosa  Bradford, 1969   (F)    [Figs]

[2] Crassantenna mimorostrata  Bradford, 1969   (F)    [Figs]
Derjuginia Jaschnov, 1947 ( Aetideinae )
Rem.: Cf. Jaschnovia
Derjuginia tolli    Linko, 1913   (F,M)
Syn.: Scolecithrix tolli Linko, 1913; non. D. tolli : Johnson, 1963 (p.95, figs.F, M)
Ref.: Brodsky, 1950 (1967) (p.157, figs.F,M); Shih & al., 1971 (p.201); Vidal, 1971 a (p.17,25,114, figs.F,M); Markhaseva, 1980 a (p.65, figs.F,M)
Loc: Arct.
Rem.: Cf. Jaschnovia tolli

Euaetideus Sars, 1925 ( Aetideinae )
Rem.: type: Aetideus giesbrechti Clève,1904. Cf. Aetideus
(13) Euchirella Giesbrecht, 1888 ( Euchirellinae )
Rem.: Type: Undina messinensis Claus,1863. 24 spp.
The bathymetric distribution of these forms shows generally a very wide amplitude.

For Tanaka (1957, p/176) the genus is characterized by the head usually separates from 1st thoracic segment; head with or without a crest; last thoracic segments fused; lateral corners of last thoracic segment rounded; rostrum usually present; abdomen 4-segmented in female; genital segment often asymmetrical: caudal rami about as long as wide; A1 23-segmented; endopod of A2 shorter than half the length of exopod; 2nd basal segment of Mx1 long; exopod of P1 2-segmented; exopod of P2 to P4 3-segmented; endopod of P1 and P2 1-segmented; endopod of P3 and P4 3-segmented; coxa of female P4 with spines on the inner margin; P5 absent in female; male P5 biramous on the right; left leg with a rudimentary endopod.

For Vervoort (1957, p.63) there is a great deal of confusion concerning the limitations of the genera Euchirella and Pseudochirella, representatives of which resemble each other in many respects. The menbers of the genus Euchirella (known in 1957), all have a reduced number of setae on the 2nd basal segment and on the endopod of Mx1 (2-3 and 4-6 respectively) ; in Pseudochirella this number is increased (5 and 14-16 respectively). The endopod of A2 is reduced in nearly all Euchirella’s (it is less than half the length of the exopod in many species and about half that length in some others ; it is, however, much less reduced in Pseudochirella. Both Euchirella and Pseudochirella are characterized by the presence of a spine or spinules on the posterior surface of the 1st basal segment of P4. Euchirella brevis Sars (1905), approaches genera Gaetanus by the presence of thin, tube like spinules ; all other species have stronger spinules or a single strong spine. Ann additional difficulty in both genera is the scarcity of adult males and the obstacles encountered when trying to identity both sexes of a species.

Euchirella acadiana    Willey, 1919   (F)
Ref.: Willey, 1918 (1919) (p.190, figs.F)
Loc: Canada (Acadie)
Lg.: F: 6,25
Rem.: Cf. Euchirella truncata

Euchirella acuta    Tanaka & Omori, 1969   (F,M)
Ref.: Tanaka & Omori, 1969 (p.34, figs.F,M)
Loc: Pacif.
Lg.: F: 4,78; 4,7; M: 3,89-3,85
Rem.: Cf. Euchirella unispina

[1] Euchirella amoena  Giesbrecht, 1888   (F,M)    [Figs]

Euchirella areata    Tanaka, 1957   (F)
Ref.: Tanaka, 1957 b (p.186, Descr.F, figs.F); Vaupel Klein, 1984 a (p.36)
Loc: Japon (Sagami)
Rem.: Cf. Euchirella bella

Euchirella atlantica    Wolfenden, 1904   (F)
Syn.: E. curticauda atlantica Wolfenden, 1904 (p.116)
Ref.: Wolfenden, 1905 a (p.20: Rem.F); van Breemen, 1908 a (p.48, Rem.)
Rem.: Cf. Euchirella curticauda

[2] Euchirella bella  Giesbrecht, 1888   (F,M)    [Figs]

Euchirella bella indica    Wolfenden, 1906   
Ref.: Wolfenden, 1905 (1906) (p.1006, Descr.F, figs.F); Sewell, 1948 (p.531); Vaupel Klein, 1984 a (p.36)
Rem.: Cf. Euchirella bella

[3] Euchirella bitumida  With, 1915   (F,M)    [Figs]

Euchirella brevis    Sars, 1905   (F)
Ref.: Wolfenden, 1905 (p.18, figs.F, Rem.); Grice, 1962 a (p.194, Rem.); Madhupratap & Haridas, 1986 (p.105, tab.1)
Rem.: Cf. Euchirella amoena

Euchirella    carinata Wolfenden, 1902   (F,M)
Ref.: Wolfenden, 1902 (p.366, Descr.M); 1904 (p.115, Descr.F)
Rem.: Cf. Chirundina streetsii

[4] Euchirella curticauda  Giesbrecht, 1888   (F,M)    [Figs]

Euchirella curticauda atlantica    Wolfenden, 1904   (F)
Ref.: Wolfenden, 1904 (p.116); Pearson, 1906 (p.16)
Rem.: Cf. Euchirella curticauda

Euchirella dentata    A. Scott, 1909   (F)
Ref.: A. Scott, 1909 (p.59,Descr.F,figs.F); Bradford & Jillett, 1980 (p.66)
Loc: Manipa Strait
Rem.: Cf. Pseudochirella dentata

Euchirella dubia    A. Scott, 1909   (F)
Ref.: A. Scott, 1909 (p.60, figs.F)
Rem.: Cf. Pseudochirella obtusa

Euchirella elongata    Wolfenden, 1905   (F)
Ref.: Wolfenden, 1905 a (p.19, Descr.F, figs.F)
Rem.: Cf. Pseudochirella spectabilis

[5] Euchirella formosa  Vervoort, 1949   (F,M)    [Figs]

[6] Euchirella galeatea  Giesbrecht, 1888   (F,M)    [Figs]

Euchirella gracilis    Wolfenden, 1911   (F)
Ref.: Wolfenden, 1911 (p.237, Descr.F, figs.F); Vervoort, 1952 f (n°47, p.4, Rem.); Vaupel Klein,1984 a (p.47)
Rem.: Cf. Euchirella truncata

[7] Euchirella grandicornis  Wilson, 1950   (F)    [Figs]

Euchirella granulata    A. Scott, 1909   (F)
Ref.: A. Scott, 1909 (p.58, Descr.F, figs.F)
Rem.: Cf. Pseudochirella granulata

Euchirella hessei    Brady, 1883   
Syn.: Euchaeta hessei Brady, 1883 (p.63, figs.F,M); non E. hessei : A. Scott, 1909 (p.54, Rem.)
Ref.: Giesbrecht & Schmeil, 1898 (p.36); Sewell, 1929 (p.109: Rem.); 1947 (p.71, Rem.)
Loc: Atlant. N
Rem.: ? Cf. Euchirella rostrata (part.)

Euchirella hirsuta    Wolfenden, 1905   (F)
Ref.: Wolfenden, 1905 a (p.17, Descr.F, figs.F)
Loc: Antarct.
Rem.: Cf. Pseudochirella hirsuta

Euchirella indica    Vervoort, 1949   (F,M)
Syn.: Vervoort, 1949 (p.23, figs.F,M)
Ref.: Vaupel Klein, 1984 a (p.35)
Rem.: Cf. Euchirella messinensis indica

Euchirella intermedia    With, 1915   (F,M)
Ref.: With, 1915 (p.124, figs.F,M); Bradford & Jillett,1980 (p.33); Björnberg & al., 1981(p.632, figs.F); Vaupel Klein, 1984 a (p.47); Greze & al., 1985 (p.7)
Rem.: Cf. Euchirella truncata

[8] Euchirella latirostris  Farran, 1929   (F,M)    [Figs]

[9] Euchirella lisettae  Vaupel Klein, 1989   (F)    [Figs]

[10] Euchirella maxima  Wolfenden, 1905   (F,M)    [Figs]

[11] Euchirella messinensis  (Claus, 1863)   (F,M)    [Figs]

Euchirella messinensis indica    Vervoort, 1949   (F,M)
Syn.: E. messinensis : A. Scott, 1909 (p.56); Tanaka, 1957 b (p.180, figs.F,M); E. indica Vervoort, 1949 (p.23, 28, figs.M); 1963 b (p.134); Grice & Hulsemann, 1968 (tab.2); Bradford & Jillett, 1980 (p.37, figs.F,M); Heinrich, 1990 (p.17); Shih & Young, 1995 (p.67); Hsiao & al., 2004 (p.325, tab.1)
Ref.: Tanaka & Omori, 1969 (p.48, figs.F,M, Rem.); 1969 a (p.157); Vaupel Klein, 1972 (p.505, figs.F, Rem.F); 1984 a (p.35, Rem.); Markhaseva, 1996 (p.158, figs.F,M); Chihara & Murano, 1997 (p.685, Pl.37,39: F,M); Mulyadi, 2001 (p.818, figs.F, Rem.)
Loc: Afr. S (S), Indien, Mer de Célèbes, mers de Chine, Taiwan E, Japon (Izu), Pacif. (tropical), Nouvelle-Zélande, Pacif. SE (tropic.), off Is. Juan Fernandez
Lg.: (37) F: 5,3-3,85; M: 4,2-4; (41) F: 5,05-4,25; M: 3,4; (56) F: 5,26; M: 4,62; (110) F: 4,9-4,4; M: 4,8-3,91; (855) F: 4,5; (866) F: 4,25-5,3; M: 3,4-4,8; { F: 3,85-5,30; M: 3,40-4,80}

Euchirella messinensis messinensis    Claus, 1863   (F,M)
Syn.: Undina messinensis Claus,1863 (p.187, figs.F,M); Euchirella messinensis : Giesbrecht, 1892 (p.232, 239, 244, figs.F,M); Esterly, 1905 (p.151, figs.F,M); Tanaka & Omori, 1969 (p.51, fig.F,M: a-e); Bradford & Jillett, 1980 (p.39, figs.F,M)
Ref.: Vaupel Klein, 1972 (p.504, figs.F); 1982 b (p.6 & suiv.); 1984 a (p.34, 35, Rem.); Markhaseva, 1996 (p.160, figs.F,M); Lapernat, 1999 (p.8); Bradford-Grieve & al., 1999 (p.879, 921, figs.F,M)
Loc: Médit., Atlant., Californie
Lg.: (37) F: 6,2-4,4; M: 5,46-2,8; (340) F: 4,9; M: 3,9
Rem.: épi-bathypélagique. Cf. Euchirella messinensis

[12] Euchirella orientalis  Sewell, 1929   (F,M)    [Figs]

[13] Euchirella paulinae  Vaupel Klein, 1980   (F)    [Figs]

Euchirella plumosa    Brady, 1918   (F)
Ref.: Brady, 1918 (p.20, Descr.F, fig.F); Sewell, 1948 (p.575); Vaupel Klein, 1984 a (p.40, 45, 46)
Rem.: ? Cf. Euchirella latirostris ou E. rostromagna

Euchirella propria    Esterly, 1911   (M)
Ref.: Esterly, 1911 (p.321, figs.F); Vervoort, 1963 b (p.134, Rem.); Vaupel Klein, 1984 a (p.47)
Rem.: Cf. Euchirella truncata

[14] Euchirella pseudopulchra  Park, 1976   (F)    [Figs]

[15] Euchirella pseudotruncata  Park, 1975   (F,M)    [Figs]

[16] Euchirella pulchra  (Lubbock, 1856)   (F,M)    [Figs]

Euchirella pulchra pacifica    Vaupel Klein, 1984   
Ref.: Vaupel Klein, 1984 a (p.44, Rem.)
Loc: Indo-Pacif.
Rem.: forme intermédiaire entre E. pulchra typica et l’espèce E. pseudopulchra.

Euchirella pulchra typica    Vaupel Klein, 1984   
Ref.: Vaupel Klein, 1984 a (p.44, Rem.)
Loc: Atlant.

[17] Euchirella rostrata  (Claus, 1866)   (F,M)    [Figs]

Euchirella rostrata magna    Wolfenden, 1905   (F)
Ref.: Wolfenden, 1905 a (p.18); Vaupel Klein, 1984 a (p.44)
Rem.: Cf. Euchirella rostromagna

[18] Euchirella rostromagna  Wolfenden, 1911   (F,M)    [Figs]

[19] Euchirella similis  Wolfenden, 1911   (F)    [Figs]

Euchirella simplex    Esterly, 1911   (F)
Ref.: Esterly, 1911 (p.320, Descr.F, figs.F)
Rem.: Cf. Euchirella maxima

[20] Euchirella speciosa  Grice & Hülsemann, 1968   (F)    [Figs]

Euchirella spinosa    Wolfenden, 1905   (F)
Ref.: Wolfenden, 1905 a (p.119, Descr.F, figs.F)
Rem.: Cf. Pseudochirella spinosa

[21] Euchirella splendens  Vervoort, 1963   (F,M)    [Figs]

Euchirella tanseii    Omori, 1965   (F)
Ref.: Omori, 1965 a (p.60, Descr.F, figs.F); Tanaka & Omori, 1969 a (p.159, Rem.); Bradford & Jillett, 1980 (p.33, 43: Rem.); Vaupel Klein, 1984 a (p.48, Rem.); Markhaseva, 1996 (p.175, Rem.)
Loc: Japon (Sagami)
Lg.: (245) F: 4,3
Rem.: ? Cf. Euchirella venusta (forme anormale)

Euchirella trigrada    Tanaka, 1957   (F)
Ref.: Tanaka, 1957 b (p.184, Descr.F, figs.F); Bradford & Jillett, 1980 (p.32); Vaupel Klein, 1984 a (p.38)
Loc: Japon
Lg.: (56) F: 5,23
Rem.: Cf. Euchirella formosa

[22] Euchirella truncata  Esterly, 1911   (F,M)    [Figs]

Euchirella tumida    Brady, 1918   (F,M)
Ref.: Brady, 1918 (p.20, figs.F,M); Vervoort, 1963 b (p.135: Rem.); 1965 (p.86)
Rem.: Cf. (part.) Scolecithrix danae

[23] Euchirella unispina  Park, 1968   (F,M)    [Figs]

[24] Euchirella venusta  Giesbrecht, 1888   (F,M)    [Figs]

Euchirella wolfendeni    Farran, 1908   (F)
Ref.: Farran, 1908 b (p.38, Descr.F, figs.F)
Rem.: Cf. Pseudochirella pustulifera

Euchirella sp.    Tanaka, 1960   (juv. F)
Ref.: Tanaka, 1960 (p.38, figs. juv.F)
Loc: Antarct. (Indien)

Euchirella sp.    Séret, 1979   (F)
Ref.: Séret, 1979 (p.82, figs.F)
Loc: Antarct. (Kerguelen)
Lg.: (246) F: 3,12

Euchirella sp. C    Vaupel Klein, 1984   
Syn.: E. bella (F) : C. B. Wilson, 1950 (p.218, figs.F)
Ref.: Vaupel Klein, 1984 a (p.49); 1989 (p.146)
Rem.: Cf. Euchirella lisettae.
(14) Gaetanus Giesbrecht, 1888 ( Aetideinae )
Rem.: Type: Gaëtanus miles Giesbrecht, 1888 (p.335). Park, 1975 a (p.11-12) joins together the two genera Gaetanus and Gaidius, but does not maintain this fusion in 1978 (p.127-136): Bradford & Jillett (1980) give a definition of the two genera. Markhaseva, 1996 retrieves the synonymy of the two genera, including 2 new species and correcting some synonymies. Provisional total: 25 spp. + 4 unidentified.

Gaetanus affinis    Sars, 1905   (F,M)
Syn.: Gaidius affinis Sars, 1905 b (p.9, Rem.F); Farran, 1908 b (p.32); Sars, 1925 (p.47, figs.F,M); Jespersen, 1934 (p.60); Sewell, 1948 (p.499, 545, 550, 566, 568); Vervoort, 1957 (p.56, figs.F, Rem.); Fagetti, 1962 (p.18); Vervoort, 1963 b (p.126); Park, 1978 (p.135: Rem.); Bradford & Jillett, 1980 (p.58, figs.F,M); Markhaseva, 1996 (p.187, 189: Rem.)
Loc: Sub-Antarct., G. de Guinée, off Açores E, Mer des Sargasses, Détr. de Davis S, Islande S, Irlande W, G. de Gascogne, Gibraltar W, Médit., Philippines, Colombie Britannique, Nouvelle-Zélande, off Galapagos, off Pérou, Chili
Rem.: Cf. Gaetanus brevispinus

[1] Gaetanus antarcticus  Wolfenden, 1905   (F,M)    [Figs]

Gaetanus antarcticus    Brady, 1918   (F)
Ref.: Brady, 1918 (p.19, figs.F); Sewell, 1948 (p.575); Park, 1975 a (p.10, Rem.); Razouls, 1982 (p.194, Rem.); Razouls, 1994 (p.71, figs.F)
Loc: Antarct., Tasmanie
Lg.: (247) F: 5
Rem.: non synonyme de l'espèce décrite par Wolfenden en 1905. Si la forme est valide elle devient : Gaetanus bradyi . Pour Park (1975 a) elle serait synonyme de Gaetanus kruppi

[2] Gaetanus armiger  Giesbrecht, 1888   (F,M)    [Figs]

Gaetanus ascendens    Esterly, 1913   (F)
Ref.: Esterly, 1913 (p.182, Descr.F, figs.F); Sewell, 1947 (p.56); Park, 1975 a (p.10); Bradford & Jillett, 1980 (p.48)
Rem.: Cf. Gaetanus brevicornis

Gaetanus atlanticus    Wolfenden, 1904   (F)
Ref.: Wolfenden, 1904 (p.132, Rem.); Jespersen, 1934 (p.61); Sewell, 1947 (p.56); Davis, 1949 (p.29: Rem.); Vervoort, 1963 b (p.129); Park, 1975 a (p.10)
Loc: off Irlande W, Détroit de Davis S
Lg.: (49) F: 4,7-4,5; (229) F: 4,4
Rem.: ? Cf. Gaetanus armiger

Gaetanus boreale    Wolfenden, 1902   (F)
Syn.: Gaidius borealis : Wolfenden, 1904 (p.131)
Ref.: Wolfenden, 1902 (p.365, Rem.F); Vervoort, 1957 (p.58); Park, 1975 a (p.11); Bradford & Jillett, 1980 (p.58); Markhaseva, 1996 (p.221)
Rem.: Cf. Gaetanus tenuispinus

[3] Gaetanus brachyurus  Sars, 1907   (F,M)    [Figs]

Gaetanus bradyi    Razouls, 1982   (F)
Syn.: G. antarcticus Brady, 1918 (p.19, Descr.F, figs.F), non G. antarcticus Wolfenden, 1905
Loc: Antarct.
Rem.: Pour Park (1975 a, p.10): ? Cf. Gaetanus kruppi

[4] Gaetanus brevicaudatus  (Sars, 1907)   (F)    [Figs]

Gaetanus brevicaudatus    Wolfenden, 1911   (F)
Ref.: Wolfenden, 1911 (p.227, Descr.F, figs.F); Sewell, 1947 (p.58); 1948 (p.523); Park, 1975 a (p.10); Bradford & Jillett, 1980 (p.48); Markhaseva, 1996, p.178, Rem.)
Loc: Atlant. (tropical S)
Rem.: Cf. Gaetanus antarcticus

[5] Gaetanus brevicornis  Esterly, 1906   (F,M)    [Figs]

[6] Gaetanus brevirostris  (Brodsky, 1950)   (F,M)    [Figs]

[7] Gaetanus brevispinus  (Sars, 1900)   (F,M)    [Figs]

Gaetanus campbellae    Park, 1975   (F,M)
Ref.: Park, 1975 a (p.12, Rem.: nom.nov.); Gardner & Szabo, 1982 (p.226, figs.F,M); Markhaseva, 1996 (p.196, Rem.)
Rem.: voir à Gaetanus intermedius Campbell,1930. Cf. Gaetanus simplex

Gaetanus caudani    Canu, 1896   (juv. M)
Ref.: Canu, 1896 (p.422, Descr. juv.M, figs. juv.M); Giesbrecht & Schmeil, 1898 (p.33, Rem.: juv. M); A. Scott, 1909 (p.46, Rem.); Vervoort, 1963 b (p.132, Rem.); Park, 1975 a (p.10, Rem.); Bradford & Jillett,1980 (p.48); Markhaseva, 1996 (p.211)
Loc: G. de Gascogne, Atlant.N, Féroé, Indonésie-Malaisie
Rem.: Cf. Gaetanus pileatus

Gaetanus clarus    Esterly, 1906   (M)
Ref.: Esterly, 1906 a (p.57, Descr.M, figs.M); Sewell, 1947 (p.62); Brodsky, 1950 (1967) (p.166, figs.M); Park, 1975 a (p.10, Rem.); Bradford & Jillett, 1980 (p.48); Markhaseva, 1996 (p.211)
Rem.: Cf. Gaetanus pileatus

[8] Gaetanus curvicornis  Sars, 1905   (F)    [Figs]

Gaetanus curvispinus    Wilson, 1950   (F,M)
Ref.: C.B. Wilson, 1950 (p.229, figs.F,M); Park, 1975 a (p.10) Bradford & Jillett, 1980 (p.48, Rem.); Markhaseva, 1996 (p.187, Rem.)
Rem.: sp. décrite très sommairement. Cf. Gaetanus brevicornis

Gaetanus denticulatus    Aurivillius, 1898   (F)
Ref.: van Breemen, 1908 a (p.38, 220, figs.juv.F)
Rem.: sp.non identifiable

[9] Gaetanus divergens  Wolfenden, 1911   (F)    [Figs]

Gaetanus ferox    With, 1915   (M)

Gaetanus hamatus    A. Scott, 1909   (F)
Ref.: A. Scott, 1909 (p.50, Descr.F, figs.F); Sewell, 1947 (p.58); Park, 1975 a (p.10, 13); Bradford & Jillett, 1980 (p.48); Markhaseva, 1996 (p.187)
Loc: Indonésie-Malaisie (Mer de Banda), Pérou (in Björnberg, 1973)
Rem.: Cf.: Gaetanus brevicornis

Gaetanus holti    Farran, 1905   (F)
Ref.: Farran, 1905 (p.33, Descr.F, figs.F); Wolfenden, 1908 (p.31, Rem.): 1911 (p.232, figs.F); Sars, 1925 (p.57); Park, 1975 a (p.10); Bradford & Jillett, 1980 (p.48)
Loc: Atlant.
Rem.: Cf. Gaetanus latifrons

[10] Gaetanus inermis  Sars, 1905   (F)    [Figs]

Gaetanus intermedius    Campbell, 1930   (F,M)
Syn.: Gaetanus simplex Brodsky, 1950 (1967) (p.164 , figs.F,M); Vinogradov, 1968 (1970) (p.44); Vaupel-Klein, 1970 (p.4, figs.F); Shih & al., 1971 (p.143); Deevey & Brooks, 1977 (p.263); Gaetanus campbellae Park, 1975 a (p.12)
Ref.: Campbell, 1930 (p.178, Descr.F, figs.F); Sewell, 1948 (p.556); Bradford & Jillett, 1980 (p.48); Gardner & Szabo, 1982 (p.226, figs.F, M); Hattori, 1991 (tab.1, Appendix); Markhaseva, 1996 (p.196, Rem.)
Loc: ? Mer des Sargasses, Japon (off Sanriku), Mer d'Okhotsk, Mer de Béring, off Aléoutiennes S, Station 'P', Colombie britannique, Chili
Rem.: Hopkins (1985, p.167) et Hopkins & Torres (1988, p.82, tab.2) signalent cette espèce en Antarctique (Croker Passage, Mer de Weddell) sans doute à tort pour Gaidius brevispinus (et in Razouls & al., 2000, p.343, tab. 5, Appendix). Si les deux genres Gaetanus et Gaidius sont réunis, le nom est alors préoccupé (Wolfenden,1905 a) : Cf.: Gaetanus simplex

[11] Gaetanus kruppii  Giesbrecht, 1903   (F,M)    [Figs]

[12] Gaetanus latifrons  Sars, 1905   (F,M)    [Figs]

Gaetanus longispinus    Wolfenden, 1905   (F)
Ref.: Wolfenden, 1905 a (p.7, Descr.F, fig.F); Sars, 1925 (p.57); Park, 1975 a (p.10); Bradford & Jillett, 1980 (p.48)
Rem.: Cf. Gaetanus latifrons

Gaetanus major    Wolfenden, 1903   (F,M)
Ref.: Wolfenden, 1903 (in Fowler, 1903, p.125, Rem.); 1904 (p.114, figs.F); Wolfenden, 1911 (p.231, Rem.); Farran, 1926 (p.249); Sewell, 1947 (p.58); Vervoort, 1963 b (p.126, 127: Rem.); Park, 1975 a (p.10); Bradford & Jillett, 1980 (p.48)
Lg.: (250) F: 5,3; (229) M: 4,65
Rem.: Proche de Gaetanus armiger. Cf. Gaetanus kruppi

Gaetanus microcanthus    Wilson, 1950   (F,M)
Ref.: C.B. Wilson, 1950 (p.231, figs.F,M); Park, 1975 a (p.10); Bradford & Jillett, 1980 (p.48); Markhaseva, 1996 (p.196)
Loc: off Pérou, off Galapagos
Lg.: (137) F: 3,85; M: 3,25
Rem.: Cf.: Gaetanus kruppii

[13] Gaetanus miles  Giesbrecht, 1888   (F,M)    [Figs]

[14] Gaetanus minispinus  Tanaka, 1969   (F)    [Figs]

[15] Gaetanus minor  Farran, 1905   (F,M)    [Figs]

[16] Gaetanus minutus  (Sars, 1907)   (F,M)    [Figs]

[17] Gaetanus paracurvicornis  Brodsky, 1950   (F, juv.M)    [Figs]

[18] Gaetanus pileatus  Farran, 1903   (F,M)    [Figs]

[19] Gaetanus pseudolatifrons  Markhaseva, 1996   (F)    [Figs]

[20] Gaetanus pungens  (Giesbrecht, 1895)   (F,M)    [Figs]

Gaetanus recticornis    Wolfenden, 1911   (F)
Ref.: Wolfenden, 1911 (p.228, Descr.F, figs.F); Sewell, 1947 (p.57); C.B. Wilson, 1950 (p.233, figs.F), De Decker & Mombeck, 1964 (p.12); Björnberg, 1973 (p.324, 386); Park, 1975 a (p.10, Rem.: p. 22); 1978 (p.136); Bradford & Jillett, 1980 (p.48); Markhaseva, 1996 (p.211)
Loc: Afr. S (E), Atlant. (tropical), off Californie, off Galapagos, off Pérou, Chili
Lg.: (10) F: 5-4,6
Rem.: Park (1975 a) estime que cette espèce est synonyme de G. pileatus

Gaetanus rectus    Wolfenden, 1911   (F)
Ref.: Wolfenden, 1911 (p.232, Descr.F, figs.F); Park, 1975 a (p.10); Markhaseva, 1996 (p.187)
Rem.: Cf. Gaetanus brevicornis

[21] Gaetanus robustus  Sars, 1905   (F,M)    [Figs]

[22] Gaetanus rubellus  Markhaseva, 1996   (F)    [Figs]

[23] Gaetanus secundus  Esterly, 1911   (F,M)    [Figs]

[24] Gaetanus simplex  Brodsky, 1950   (F,M)    [Figs]

[25] Gaetanus tenuispinus  (Sars, 1900)   (F,M)    [Figs]

Gaetanus unicornis    Esterly, 1906   (F)
Ref.: Esterly, 1906 (p.157, Descr.F, figs.F); Park, 1975 a (p.10); Bradford & Jillett, 1980 (p.48); Markhaseva, 1996 (p.211)
Rem.: Cf. Gaetanus pileatus

Gaetanus wolfendeni    Park, 1975   (F)
Syn.: Gaetanus brevicaudatus Wolfenden, 1911 (p.227, figs.F)
Rem.: Park (1975 a, p.12), introduit ce changement de nom du fait de la mise en synonymie de Gaidius avec Gaetanus , ce qui n'est pas suivi par Bradford & Jillett (1980). Cf. Gaetanus antarcticus

[26] Gaetanus sp.  Paiva, 1963   (M)    [Figs]

Gaetanus sp.    Tanaka, 1969   (M)
Syn.: ? Gaetanus armiger : Tanaka, 1969 (p.257, Descr.M, figs.M)
Loc: off Perou
Lg.: (105) M: 2,55
Rem.: Cf. Gaetanus sp.2 Tanaka, 1969

[27] Gaetanus sp.  Tanaka, 1969   (F)    [Figs]

[28] Gaetanus sp.2  Tanaka, 1969   (M)    [Figs]

[29] Gaetanus sp.  Tanaka & Omori, 1970   (M)    [Figs]
(15) Gaidiopsis A. Scott, 1909 ( Aetideinae )
Rem.: Type: Gaidiopsis crassirostris A. Scott, 1909. Total: 1 sp.
Diagnosis after A. Scott (1909, p.52):
Forehead without cephalic spine, wxith short one-pointed rostrum.
4th and 5th thoracic segments completely separated.
5th segment peoduced into strong lateral spines.
Abdomen 4-segmented.
A1 24-segmented.
A2, Md, Mx1 and Mxp, almost similar to those of Gaidius (= Gaetanus).
Exopodite of P1 distinctly 3-segmented.
P2, P3 and P4 similar to those of Gaidius (= Gaetanus).
Endopodite of P2 distinctly 2-segmented.
Remarks: This new genus resembles Aetideopsis and also Gaidius (= Gaetanus).

[1] Gaidiopsis crassirostris  A. Scott, 1909   (F)    [Figs]
Gaidius Giesbrecht, 1895 ( Aetideinae )
Rem.: type: Gaidius pungens Giesbrecht,1895. Markhaseva (1996, p.176) considers this genus as a junior synonym of Gaetanus.
Gaidius affinis    Sars, 1905   (F,M)
Rem.: Cf. Gaidius brevispinus
Gaidius boreale    Wolfenden, 1902   (F)
Rem.: Cf. Gaidius tenuispinus
Gaidius brevicaudatus    Sars, 1907   (F)
Rem.: Cf. Gaetanus brevicaudatus Sars,1907 non Wolfenden,1911
Gaidius brevirostris    Brodsky, 1950   (F,M)
Rem.: Cf. Gaetanus brevirostris
Gaidius brevispinus    Sars, 1900   (F,M)
Rem.: Cf. Gaetanus brevispinus
Gaidius columbiae    Park, 1967   (F,M)
Rem.: Cf. Gaidius minutus
Gaidius cryptospinus    Sars, 1905   (juv. F)
Rem.: Cf. Pseudochirella cryptospina
Gaidius divaricatus    Sars, 1905   (F)
Rem.: Cf. Pseudochirella divaricata
Gaidius glacialis    Brady, 1918   (juv. M)
Ref.: Brady, 1919 (p.19, Vervoort, 1951 (p.81, Rem.: juv.M); 1957 (p.58), Park, 1975 a (p.11); Markhaseva, 1996 (p.221)
Lg.: (247) Juv.: 2,85
Rem.: Cf. Gaidius tenuispinus
Gaidius inermis    Sars, 1905   (F)
Rem.: Cf. Gaetanus inermis
Gaidius intermedius    Wolfenden, 1905   (F,M)
Rem.: Cf. Gaetanus brevispinus
Gaidius major    Wolfenden, 1904   (F,M)
Ref.: Wolfenden, 1904 (p.114, Rem.F,M); Mazza, 1967 (p.128: Rem.); Park, 1975 a (p.11); Markhaseva, 1996 (p.187)
Lg.: (229) F: = 4,65; M: ± 3,1
Rem.: Cf. Gaetanus brevispinus
Gaidius maximus    Wolfenden, 1906   (F)
Rem.: Cf. Gaetanus robustus
Gaidius minutus    Sars, 1907   (F,M)
Syn.: Chiridius tenuispinus : Campbell, 1929 (p.311); Gaidius minutus Sars, 1907 a (p.10, Rem.F); 1925 (p.49, figs.F comme G. pusillus )
Rem.: Park (1975 a) et Bradford & al. (1980) ne sont pas en accord sur la synonymie entre cette espËce et G. columbiae. Cf. Gaetanus minutus.
Gaidius moderatus    Tanaka, 1957   (F,M)
Rem.: Cf. Gaetanus minutus
Gaidius notacanthus    Sars, 1905   (F,M)
Rem.: Cf. Pseudochirella notacantha
Gaidius parvispinus    Farran, 1908   (F)
Rem.: Cf. Pseudochirella cryptospina
Gaidius pungens    Giesbrecht, 1895   (F,M)
Rem.: Cf. Gaetanus pungens.
Gaidius robustus    Sars, 1905   (F,M)
Rem.: Cf. Gaetanus robustus.
Gaidius robustus    Vervoort, 1949   (F)
Ref.: Vervoort, 1949 (p.12, Descr.F, figs.F); Grice & Hulsemann, 1967 (p.24, Rem.); Park, 1975 a (p.11); 1978 (p.127); Bradford & Jillett, 1980 (p.58)
Loc: Mer de Flores
Rem.: Cf. Gaidius brevispinus
Gaidius similis    T. Scott, 1894   (M)
Syn.: Euchaeta hessei similis T. Scott, 1894 b (p.58, Descr.M, figs.M), non G. similis : A. Scott, 1909 (p.51)
Ref.: With, 1915 (p.94, Rem.); Vervoort, 1957 (p.58); Park, 1975 a (p.11, Rem.)
Loc: G. de Guinée
Lg.: (57) M: 2,2
Rem.: sp. douteuse.
Gaidius tenuispinus    Sars, 1900   (F,M)
Rem.: Cf. Gaetanus tenuispinus.
Gaidius validus    Farran, 1908   (juv. F)
Rem.: Cf. Gaetanus robustus
Gaidius variabilis    Brodsky, 1950   (F,M)
Rem.: Cf. Gaetanus minutus
Gaidius sp.    Tanaka, 1969   (F)
Rem.: femelle endommagÈe. Cf. Gaetanus sp.
Gaidius sp.    Tanaka & Omori, 1970   (M)
Rem.: Cf. Gaetanus sp.
Gaidius sp.1    Jaschnov, 1927   
Loc: Mer de Kara
Gaidius sp.2    Jaschnov, 1927   
Loc: Mer de Kara
(16) Jaschnovia Markhaseva, 1980
Rem.: 2 spp.

[1] Jaschnovia brevis  (Farran, 1936)   (F,M)    [Figs]

Jaschnovia johnsoni    Markhaseva, 1980   (F,M)
Ref.: Markhaseva, 1980 a (p.68, figs.F,M); 1996 (p.226)
Rem.: Cf. Jaschnovia brevis

[2] Jaschnovia tolli  (Linko, 1913)   (F,M)    [Figs]
(17) Lutamator Bradford, 1969 ( Aetideinae )
Rem.: Type: Lutamator hurleyi Bradford, 1969. 3 spp.).

Diagnosis from Bradford (1969, p.491) [provisionally until further species are discovered] :
- head and 1st thoracic segment 1fused, 4th and 5th thoracic segments fused.
- Posterior thoracic borders extended into short points .
- Rostrum bluntly rounded.
- Posterior borders of abdominal segments edged with a weakly chitinised striated fringe.
- A1 24-segmented with long antennulate setae.
- A2 endopod and exopod equal; segment 1 of endopod wider proximally than distally; exopod tapers distally, segments 1 and 2 with 1 and 2 setae.
-- Md palp large.
- Mx1 inner lobe 1 (arthrite) with 11 spines and setae.
- Mxp basipod 1 twice as long as wide.
- P1 endopod 1-segmented.
- P2 endopod 2-segmented, all other rami 3-segmented; external spines on exopods large. Teeth on terminal spine of exopods connected by a lamella.

After Markhaseva & Schulz (2008, p.33) female specimens of Prolutamator share with Lutamator Bradford (1969) the following features: 1- rostrum as a poorly developed blunt plate; 2- A2 exopod nearly as long as endopod; 3- Md endopodal segment 2 with fewer than 7 setae; 4- coxal endite of Mxp syncoxa without sensory element; 5- P5 absent.
Except for the above characters (1-4) the genus Lutamator was defined by: 1- A2 endopodal segment 1 wider proximally than distally; 2- A2 exopodal segment 1 with 1 seta; 3- number of setae on the praecoxal arthrite of Mx1 reduced (11 setae). Its definition was considered tentative ''until further species are discovered'' (Bradford, 1969).
The genus was redefined by Alvarez (1984) and two species were included (L. hurleyi, L. elegans). The redefinition in genertal follows the earlier definition, but unfortunately has a misleading sentence that lacks the correct name of the described limb.

[1] Lutamator elegans  Alvarez, 1984   (F)    [Figs]

[2] Lutamator hurleyi  Bradford, 1969   (F)    [Figs]

[3] Lutamator paradiseus  Ohtsuka, Boxshall & Shimomura, 2005   (F,M)    [Figs]
(18) Mesocomantenna Alvarez, 1986
Rem.: 1 sp.:

[1] Mesocomantenna spinosa  Alvarez, 1986   (F)    [Figs]
Mesogaidius Wolfenden, 1911
Rem.: Cf. Gaetanus
Mesogaidius intermedius    Wolfenden, 1905   (F,M)
Syn.: Gaidius intermedius Wolfenden, 1905 a (p.6, figs.F); Markhaseva, 1996 (p.187)
Rem.: Cf. Gaetanus brevispinus
Mesogaidius maximus    Wolfenden, 1906   (F)
Syn.: Gaidius maximus Wolfenden, 1906 (p.35, Descr.F, figs.F)
Ref.: Wolfenden, 1911 (p.224, figs.F); Markhaseva, 1996 (p.217)
Rem.: Cf. Gaetanus robustus (Sars,1905)

Mesundeuchaeta Wolfenden, 1911
Rem.: Cf. Undeuchaeta
Mesundeuchaeta asymmetrica    Wolfenden, 1911   (F)
Ref.: Wolfenden, 1911 (p.244, figs.F); Markhaseva, 1996 (p.302)
Rem.: Cf. Undeuchaeta incisa
(19) Paivella Vervoort, 1965 ( Aetideinae )
Rem.: type: Paivella inaciae Vervoort,1965. 2 spp.:

[1] Paivella inaciae  Vervoort, 1965   (F,M)    [Figs]

[2] Paivella naporai  Wheeler, 1970   (F)    [Figs]
(20) Parabradyidius Schulz & Markhaseva, 2000
Rem.: type: Parabradyidius angelikae Schulz & Markhaseva, 2000. Total: 2 spp. (which one juvenil).

Diagnosis from Schulz & Markhaseva (2000, p.78) :
- Rostrum strongly bifurcate lacking filaments.
- 5th pedigerous somite tapering into long pointed process posteriorly.
- A2 exopod and endopod subequal in length; 1st exopodal segment with 1 seta, 2nd with 3 setae, 7th segment lacking medial seta.
- Md basis bearing 2 setae.
- Mx1 exopod with 11 setae.
- Exopod of P1 3-segmented; outer spine of 1st segment present and more slender than that of 2nd segment.
- Coxa of P1, P2 and P3 with outer patch of spinules.
- Posterior surfaces of P2 to P4 partly covered by spinules.
- P5 present, uniramous, indistinctly 3-segmented; apical segment small bearing spines or spine-like projections.
- Rostrum similar to that of female bur less diverging distally.
- Posterior corner of 5th pedigerous somite with small pointed process.
- Cephalosomal limbs more or less reduced.
- P5 biramous on both sides, simple, left leg longer than right.

The new genus differs from Aetideopsis, Bradyidius, Pseudotharybis in relative length of A2 endo- and exopod: while in these three genera the exopod is distinctly longer than the endopod (ca. 1.2 - 1.5 times), in Parabradyidius these rami are subequal or the exopod may be even slightly shoryter. In addition, Parabradyidius lacks the medial seta of the A2 7th exopodal segment present in these three taxa.

[1] Parabradyidius angelikae  Schulz & Markhaseva, 2000   (F,M)    [Figs]

[2] Parabradyidius spinibasis  (Bradford, 1969)   (juv. F, juv. M)    [Figs]
(21) Paracomantenna Campaner, 1978 ( Aetideinae )
Rem.: type: Bryaxis minor Farran,1905. Total: 6 spp.:

[1] Paracomantenna goi  Ohtsuka, Boxshall & Shimomura, 2005   (F)    [Figs]

[2] Paracomantenna gracilis  Alvarez, 1986   (F)    [Figs]

[3] Paracomantenna magalyae  Campaner, 1978   (F)    [Figs]

[4] Paracomantenna minor  (Farran, 1905)   (F,M)    [Figs]

[5] Paracomantenna profunda  Markhaseva & Renz, 2019   (F)    [Figs]

[6] Paracomantenna wishnerae  Markhaseva, 1995   (F)    [Figs]
(22) Prolutamator Markhaseva & Schulz, 2008
Rem.: Type: Prolutamator hadalis Markhaseva & Schulz, 2008. Total: 2 spp.. Total: 3 spp.
Abyssal above the sea bed.

Diagnosis from Markhaseva & Schulz (2008, p.32) :
- Cephalosome and pediger 1 more or less separate, 4th and 5th separate.
- Posterior corners of prosome short and rounded.
- Rostrum a poorly blunt plate.
- Urosome 4-segmented.
- Genital double-somite symmetrical.
- A1 24-segmented, 1st segment with 1 seta.
- A2 endopod nearly as long as exopod; endopodal segment 1 moderately wide in proximal part bearing 2 setae; basdis and exopodal segment 1 with 2 setae each.
- Md basis with 2-3 setae; endopoda segment 2 with 5-6 setae.
- Mx1 praecoxal endite with 9 terminal, 4 posterior and 1 anterior setae; coxal epipodite with 5-6 setae; distal basal endite with 5 setae; endopod with 14-15 setae.
- Mx2 endopod with 6 long and 2 short setae.
- Mxp proximal praecoxal endite with 1 seta, middle and distal endites with 2 and 3 setae, respecyively; coxal endite without sensory element.
- P1 exopodal segments 1-3 with lateral spine each.
- Segmentation of P1-P4 as typical of Aetideidae.
- P5 absent.

Male unknown.

[1] Prolutamator hadalis  Markhaseva & Schulz, 2008   (F)    [Figs]

[2] Prolutamator minor  Markhaseva & Schulz, 2008   (F)    [Figs]

[3] Prolutamator pseudohadalis  Markhaseva & Renz, 2019   (F)    [Figs]
Pseudaetideus Wolfenden, 1904 ( Aetideinae )
Rem.: type: Euchaeta armata (Boeck,1872). For Vervoort (1952) this species is close to Chiridius obtusifrons . Cf. Aetideopsis
(23) Pseudeuchaeta Sars, 1905 ( Aetideinae )
Rem.: type: Autanepsius minor Wolfenden, 1906. 8 spp.

Definition after Bradford & Jillett (1980, p.63) :
- Robust copepods with blunt, rounded rostrum.
- Head and pediger segment 1 partially fused, 4th and 5th pediger segments partially fused.
- Posteolateral corners of last thoracic segment extended into points
- Posterior borders of urosomal segments edged with weakly scleritized fringe.
- Female A1 24-segmented, extending at most length of prosome, bears few sensory filaments and numerous annulate setae, long distally , endopod setae with as in Bradyidius
- A2 exopod and endopod equal with 2 setae on exopodal segments 1 and 2.
- Endopod of Md small.
- Mx1 inner lobe 1 (arthrite) with 11 or 13 spines and setae, posterior surface having 1 or 3 setae.
- Mxp large with sensory organ on basipodal segment 1 (as in Comantenna), endopod setae with crescent-shaped appendages along their length.
- Exopodal segment 1 of P1 without outer edge spine; external exopod spines large.
- Posterior surface of endopods of P3 and P4 with fine spinules.
- Terminal spines of leg exopods with long widely-spaced teeth joined by a lamella.
P5 absent.

- A1 23-segmented.
- Mouthparts slightly reduced.
- Basipodal segment 1 of Mxp with distal sensory appendage.
- Left P5 with exopod 3-segmented, small lobe on segment 3 lined with spinules, endopod 1-segmented, equals length of exopodal segment 1; right leg exopod 3-segmented, segments 1 and 3 with outer edge spine, segment 3 with long terminal spine extending as sword-like expansion , endopod 1-segmented, club-shaped.

[1] Pseudeuchaeta acuticornis  Markhaseva & Schulz, 2006   (F)    [Figs]

[2] Pseudeuchaeta arctica  Markhaseva, 1986   (F,M)    [Figs]

[3] Pseudeuchaeta brevicauda  Sars, 1905   (F,M)    [Figs]

[4] Pseudeuchaeta flexuosa  Bradford, 1969   (F)    [Figs]

[5] Pseudeuchaeta magna  Bradford, 1969   (F)    [Figs]

[6] Pseudeuchaeta major  (Wolfenden, 1906)   (F)    [Figs]

[7] Pseudeuchaeta spinata  Markhaseva, 1986   (F)    [Figs]

[8] Pseudeuchaeta vulgaris  Markhaseva, Mohrbeck & Renz, 2017   (F)    [Figs]
(24) Pseudochirella Sars, 1920 ( Euchirellinae )
Rem.: type not designated, Pseudochirella obesa proposed by von Vaupel Klein (1984 a, p.52).
Total: 30 spp. + 1 unidentified.

Definition after Bradford & Jillett (1980, p.66) :
- Body resembling Euchirella and Chirundina.
- Head and pediger segment 1 fused, segments 4 and 5 separate or fused.
- Forehead rounded in lateral view, without crest.
- Rostrum distinct, one-pointed.
- Posterolateral corners of last thoracic segment rounded or produced into spines.
- Genital segment asymmetrical in many forms.
- A1 as long as body.
- A2 endopod strongly developed, usually one half length of exopod or slightly longer; exopod segments 1 and 2 separate.
- Mx1 with larger number of setae than in Euchirella: 5 setae on basipodal segment 2; 16 setae on endopod.
- Segments of legs as in Euchirella.
- Exopodal segment 1 of P1 with well developed outer edge spine.
- Coxa of P4 with 6-14 strong spines on posterior surface.
- Setae on outer edge of caudal rami thin and usually elongate.

- Slender body.
- A1 with reduced number of segments, some setae thickened.
- A2 endopod more than half length of exopod.
- P5 with coxa and basis swollen; endopod elongate, 1-segmented, truncate at apex; left leg exopod 3-segmented, segments short, last segment rounded distally; right leg exopod with 2 elongate segments.

[1] Pseudochirella accepta  Zvereva, 1976   (F)    [Figs]

[2] Pseudochirella batillipa  Park, 1978   (F,M)    [Figs]

[3] Pseudochirella bilobata  Vervoort, 1949   (F)    [Figs]

[4] Pseudochirella bowmani  Markhaseva, 1986   (F)    [Figs]

[5] Pseudochirella calcarata  Sars, 1920   (juv. F)    [Figs]

[6] Pseudochirella cryptospina  (Sars, 1905)   (juv. F)    [Figs]

[7] Pseudochirella dentata  (A. Scott, 1909)   (F)    [Figs]

[8] Pseudochirella divaricata  (Sars, 1905)   (F)    [Figs]

[9] Pseudochirella dubia  (Sars, 1905)   (F,M)    [Figs]

Pseudochirella elongata    Wolfenden, 1905   (F,M)
Syn.: Euchirella elongata Wolfenden, 1905 a (p.19, Descr.F, figs.F); Sewell, 1948 (p.574)
Ref.: Sewell, 1948 (p.574); Vervoort, 1957 (p.69); Park, 1978 (p.159, figs.F,M); Markhaseva, 1984 (p.391, figs.F,M); 1989 (p.39, 41); Markhaseva, 1996 (p.289)
Loc: Antarct., Arct.
Rem.: Cf. Pseudochirella spectabilis

Pseudochirella fallax    Sars, 1920   (F,M)
Syn.: Bradyetes major Sars, 1907 a (p.9, Rem.F)
Ref.: Sars, 1920 c (p.6, Rem.); 1925 (p.95, figs.F, Rem.M); Sewell, 1948 (p.500); Markhaseva, 1989 (p.35, 40, 41, Descr.M, figs. M); Vaupel Klein, 1995 (p.914, Rem.); Markhaseva, 1996 (p.264, figs.F,M)
Loc: Atlant. (tempÈrÈ), AÁores, CaraÔbes, Mer des Sargasses, Indien W
Rem.: Cf. Pseudochirella major

[10] Pseudochirella formosa  Markhaseva, 1989   (F)    [Figs]

[11] Pseudochirella gibbera  Vervoort, 1949   (F)    [Figs]

Pseudochirella granulata    A. Scott, 1909   (F)
Syn.: Euchirella granulata A. Scott, 1909 (p.58, Descr.F, figs.F)
Ref.: Vervoort, 1952 g (n_48, p.4, Rem.); Bradford & Jillett, 1980 (p.66); Markhaseva, 1989 (p.55); 1996 (p.262, Rem.)
Loc: Mer de Ceram (Manipa Strait)
Rem.: Cf. Pseudochirella dubia

Pseudochirella gurjanovae    Brodsky, 1955   (M)
Ref.: Brodsky, 1955 a (p.189, Descr.M, figs.M); Bradford & Jillett, 1980 (p.66); Markhaseva, 1986 a (p.841, Rem.)
Rem.: Cf. Batheuchaeta gurjanovae

[12] Pseudochirella hirsuta  (Wolfenden, 1905)   (F,M)    [Figs]

[13] Pseudochirella limata  Grice & Hulsemann, 1968   (F)    [Figs]

[14] Pseudochirella lobata  (Sars, 1907)   (F)    [Figs]

Pseudochirella magna    Wolfenden, 1911   (F,M)
Syn.: Chirundina magna Wolfenden, 1911 (p.241, Descr.F, figs.F)
Ref.: Vervoort, 1949 (p.48, figs.M); Bradford & Jillett,1980 (p.27, 66)
Rem.: Cf. Chirundinella magna

[15] Pseudochirella major  (Sars, 1907)   (F,M)    [Figs]

[16] Pseudochirella mariana  Markhaseva, 1989   (F)    [Figs]

[17] Pseudochirella mawsoni  Vervoort, 1957   (F,M)    [Figs]

[18] Pseudochirella notacantha  (Sars, 1905)   (F,M)    [Figs]

[19] Pseudochirella obesa  Sars, 1920   (F,M)    [Figs]

[20] Pseudochirella obtusa  (Sars, 1905)   (F,M)    [Figs]

[21] Pseudochirella pacifica  Brodsky, 1950   (F,M)    [Figs]

[22] Pseudochirella palliata  (Sars, 1907)   (F)    [Figs]

Pseudochirella polyspina    Brodsky, 1950   (F)
Syn.: Pseudeuchirella polyspina: Bjˆrnberg, 1973 (p.324, 388)
Ref.: Brodsky, 1950 (1967) (p.186, Descr.F, figs.F); Park, 1978 (p.169, figs.F,M); Bradford & Jillett, 1980 (p.66); Gardner & Szabo,1982 (p.252, figs.F); Markhaseva, 1989 (p.36); 1996 (p.278, 281: Rem.)
Rem.: Cf. Pseudochirella obtusa

[23] Pseudochirella pustulifera  (Sars, 1905)   (F,M)    [Figs]

[24] Pseudochirella scopularis  (Sars, 1905)   (F)    [Figs]

[25] Pseudochirella semispina  Vervoort, 1949   (F)    [Figs]

[26] Pseudochirella spectabilis  (Sars, 1900)   (F,M)    [Figs]

Pseudochirella spinifera    Brodsky, 1950   (M)
Ref.: Brodsky, 1950 (1967) (p.188, figs.M); Park, 1978 (p.169, 171: Rem.); Bradford & Jillett, 1980 (p.66); Markhaseva, 1989 (p.36, Rem.); 1996 (p.278, 281: Rem.)
Rem.: Cf. Pseudochirella obtusa

[27] Pseudochirella spinosa  (Wolfenden, 1905)   (F)    [Figs]

Pseudochirella squalida    Grice & Hulsemann, 1967   (F,M)
Ref.: Grice & Hulsemann, 1967 (p.24, figs.F); Ferrari, 1980 (p.537, figs.F,M, juv.); Bradford & Jillett, 1980 (p.67); Markhaseva, 1989 (p.37); 1996 (p.275)
Rem.: Cf. Pseudochirella notacantha

Pseudochirella superba    With, 1915   (F,M)
Syn.: Undeuchaeta superba With, 1915 (p.137)
Ref.: Vervoort, 1952 g (n_48, p.3, fig.M, Rem.F,M); Bradford & Jillett, 1980 (p.80, Rem.); Markhaseva, 1996 (p.302)
Rem.: Cf. Undeuchaeta incisa Esterly,1911

[28] Pseudochirella tanakai  Markhaseva, 1989   (F, ?M)    [Figs]

Pseudochirella tuberculata    Tanaka, 1957   (F,M)
Ref.: Tanaka, 1957 b (p.195, Descr.F, figs.F); Roe, 1975 (p.307, figs.M); Bradford & Jillett, 1980 (p.66); Markhaseva, 1996 (p.276)
Rem.: Cf. Pseudochirella obesa

Pseudochirella tuberosa    Grice & Hulsemann, 1968   (F)
Ref.: Grice & H¸lsemann, 1968 (p.327, Descr.F, figs.F); Bradford & Jillett, 1980 (p.66); Markhaseva, 1996 (p.272)
Loc: Is. Juan Fernandez
Rem.: Cf. Pseudochirella mawsoni

[29] Pseudochirella vervoorti  Tanaka & Omori, 1969   (F)    [Figs]

[30] Pseudochirella vulgaris  Markhaseva, 1997   (F)    [Figs]

[31] Pseudochirella sp.  Bradford, 1972   (F)    [Figs]
Pseudogaetanus Brodsky, 1950 ( Aetideinae )
Rem.: type: Pseudogaetanus robustus (Sars,1905). Cf. Gaetanus
Pseudogaetanus robustus    Sars, 1905   (F,M)
Syn.: Gaetanus robustus Sars, 1905 b (p.11, Rem.F)
Ref.: Brodsky, 1950 (1967) (p.169, figs.F,M); Tanaka & Omori, 1967 (p.244)
Rem.: Cf. Gaidius robustus (Sars,1905)
(25) Pseudotharybis T. Scott, 1909 ( Aetideinae )
Rem.: Genus excluded from the Tharybidae by Bradford (1976 a) and considered as intermediary between the Aetideidae and the Tharybidae by Markhaseva (1996). Type: Pseudotharybis zetlandicus. Total: 7 spp.

Definition after Bradford & Jillett (1980, p.71) :
- All characteristics as in Bradyidius except that females have P5 3-segmented, terminal segment with 2 terminal and 1 external spine-like extensions.
- Males also almost identical with Bradyidius in having both biramous and uniramous P5, but instead of posteriorly directed spine arising from very posterior last thoracic border; Pseudotharybis males have a small tooth placed more dorsally on last metasomal segment.

[1] Pseudotharybis brevispinus  (Bradford, 1969)   (F)    [Figs]

[2] Pseudotharybis dentatus  (Bradford, 1969)   (M)    [Figs]

Pseudotharybis dubius    T. Scott, 1909   (F)
Ref.: T. Scott, 1909 a (p.35, Descr.F, figs.F); Bradford, 1976 a (p.9, Rem.: Genre erronÈ)
Loc: Irlande N
Rem.: Cf.: spp. inc. sedis

[3] Pseudotharybis magnus  (Grice & Hulsemann, 1970)   (M)    [Figs]

[4] Pseudotharybis polaris  Markhaseva & Schulz, 2008   (F)    [Figs]

[5] Pseudotharybis robustus  (Bradford, 1969)   (F,M)    [Figs]

Pseudotharybis spinibasis    Bradford, 1969   (Juv. F & M)
Syn.: ? Aetideopsis magna (M) Grice & H¸lsemann, 1970 (p.188, figs.M); Bradyidius spinibasis: Bradford, 1969 b (p.481, figs. juv. F&M); Bradford & Jillett, 1980 (p.21, 74, figs.F,M)
Loc: Nouvelle-ZÈlande (N), ? off Woods Hole
Lg.: (201) juv.F: 3,35; juv.M: 3,9
Rem.: Cf. Parabradyidius spinibasis

[6] Pseudotharybis zetlandicus  T. Scott, 1909   (F)    [Figs]
(26) Pterochirella Schulz, 1990
Rem.: Type: Pterochirella tuerkayi Schulz, 1990. Total: 1 sp.
This genus shows affinities with Bradyetes and Pseudeuchaeta.

Diagnosis from Schulz (1990, p.182) :
Male :
- Cephalosome and 1st pedigerous somite fused, 4th and 5th pedigerous somite fused.
- Dorsal body wall of prosome transformed into deep transverse cleft encompassed by number of paired lobe-like structures.
- 1st pedigerous somite with paired winglike extension.
- Urosome 5-segmented.
- Rostrum absent, 2 delicate filaments present.
- A2 with endopod equaling exopod in length.
- Mouthparts considerably reduced.
- Endopods of P1 1-segmented, of P2 2-segmented, all other rami 3-segmented.
- P5 biramous with left and right protopod of about equal length, not swollen; endopods 1-segmented; exopods 2- to 3-segmented; distal segment of right side particularly long, tapering distally.

For Schulz (1990, p.187) according to Bradford & Jillett (1980) several features of this genus point to the family Aetideidae. In the male sex: 1 - fusion of cephalosome with 1st pedigerous somite and of somites 4 and 5; 2 - reduction or total lack of a rostrum; 3 - reduced number of segments of A1, swollen proximal segments armed with many large club-shaped aesthetascs; 4 - considerably reduced mouthparts; 5 - segmentation of P1 to P4, and pronounced, acute teeth on terminal spines of P2 to P4; 6 - presence of both endopods on P5. Furthermore, the presence of rows of spinules on the prominent outer lobe of the endopod of P1, described by Vaupel-Klein (1972) for the genus Euchirella, seems to support this classification. Pterochirella differs from both genera in the incomplete fusion of segments 9 and 10, 12 and 13, and complete fusion of segments 24 and 25 of the A1. Segments 20 and 21 are fused on the right but separate on the left A1. Furthermore, Pterochirella lacks the extraordinarily strong spine on lobe 5 of the Maxilla typical of Bradyetes. P5 of Pterochirella is distinguished from those of Bradyetes and Pseudeuchaeta by the comparatively short left protopod and the relative length of the endopods of which the right one is longer than the left. Morever, the right exopod terminates in a more or less straight distal segment, not curved as it is found in the other genera..
Pterochirella is assignable to the subfamily Euchirellinae of Brodsky (1950 [1967]) characterized particularly by 1- the more complex structure of male P5 and 2- the shortened urosome in the female (absent still in 2015).

[1] Pterochirella tuerkayi  Schulz, 1990   (M)    [Figs]
(27) Senecella Juday, 1923
Rem.: freshwater (relict) and brackish. Total: 2 spp.:

[1] Senecella calanoides  Juday, 1923   (F,M)    [Figs]

[2] Senecella siberica  Vyshkvartzeva, 1994   (F,M)    [Figs]
Snelliaetideus Vervoort, 1949 ( Aetideinae )
Rem.: type: S. arcuatus Vervoort,1949. Cf. Aetideus
Snelliaetideus arcuatus    Vervoort, 1949   (F)
Ref.: Vervoort, 1949 (p.4, Descr.F, figs.F), Park, 1978 (p.108, figs.F)
Loc: IndonÈsie, Antarct., Chili, Mer des Antilles, G. du Mexique
(28) Sursamucro Bradford, 1969 ( Aetideinae )
Rem.: type: Sursamucro spinatus Bradford,1969. Total: 1 sp.

Defnition after Bradford & Jillett (1980, p.77) :
- Head and 1st pediger segment fused, 4th and 5th pediger segments separate.
- Posterolateral corners of last thoracic segment with points turned dorsally.
- Rostrum bluntly rounded.
- Posterior urosomal borders fringed with well defined teeth.
- A1 24-segmented, bearing long annulate setae with some sensory filaments.
- A2 exopod and endopod equal; exopod with 2 setae on segments 1 and 2.
- Mandibular palp large.
- Mx1 inner lobe 1 (arthrite) with 14 spines and setae.
- Mxp basipodal segment 1 with length twice width.
- P1 exopod with 3 external spines.
- External spines on exopods large on all legs.
- Posterior surface of endopod of P2 to P4 bear fine spinules.
- Terminal spines of P2-P4 exopods with coarse teeth without connecting lamella.
- P5 usually absent.
- Male unknown.

[1] Sursamucro spinatus  Bradford, 1969   (F)    [Figs]
(29) Undeuchaeta Giesbrecht, 1888 ( Euchirellinae )
Rem.: type: Undeuchaeta major Giesbrecht,1888. Total: 5 spp. (of which 1 doubtful) + 1 sp.

Diagnosis after Tanaka (1957 b, p.199) :
- Head and 1st pediger segment fused, 4th and 5th pedigers fused.
- Head with or without crest.
- Posterolateral corners of last thoracic segment bluntly produced in female; rounded in male.
- Rostrum 1-pointed.
- Caudal rami short; appendicular seta short.
- A1 23-segmented.
- Endopod of A2 more than half the length of exopod.
- Mx1 exopod short, number of seta on endopod unreduced.
- Mx2 as in Aetideus.
- Mxp endopod very short.
- P2 endopod 1-segmented.
- P5 absent in female.
- P1 exopod 3-segmented.
- P5 male biramose.

Definition after Bradford & Jillett (1980, p.80):
- Head and pediger segment 1 indistinctly separate, pediger segments 4 and 5 fused.
- Forehead rounded or crested.
- Posterolateral corners of last thoracic segment more or less asymmetrical, rounded or triangular with rounded apex.
- Genital segment asymmetrical with ventral/or dorsal spine.
- Rostrum small, one-pointed.
- A1 23-segmented.
- A2 endopod more than half length of exopod.
- Mx1 endopod with 15 setae, basipodal segment 2 with 5 setae.
- P1 exopodal segments 1 and 2 partially separate, segment 1 without external spine.
- Endopod of P2 1-segmented.
- Coxa of P4 with or without internal edge spines; if present spines do not protrude posteriorly as in Pseudochirella;
- Body slender.
- P5 biramous on both sides; basal segments swollen, endopods 1-segmented; left leg exopod 3-segmented, apical segment with styliform distal portion with patch of hairs at midlength.

Diagnosis after Vives & Shmeleva (2007, p.603):
- Head and 1st pediger fused, sometimes with line of separation, 4th and 5th pedigers fused.
- Prosome longer than 3 times the urosome.
- A1 extenends to end of 3rd urosomal segment.
- Genital segment asymmetrical, sometimes with spicules on the margin posterior dorsal.
- P1 exopod with 2 or 3 segments and P2 to P4 with 3 segments.
- P1 endopod with 1 segment, P2 with 1 or 2 segments and P3-P4 with 3 segments.
-P5 absent.
- Geenerally without crest, but if exists, very small.
- Segmentation of prosome as in the female.
- Posteroangles of last thoracic segment slightly asymmetrical.
- Urosme 5-segmented.
- P5 biramous, asymmetrical and longer than urosome. the left leg longer than the right; endopod 1-segmented, exopod 3-segmented; right leg exopod 2-segmented.

Undeuchaeta bispinosa    Esterly, 1911   (F,M)
Syn.: non U. bispinosa (M) : Sewell, 1929 (p.126, figs.M)
Ref.: Esterly, 1911 (p.318, Descr.F, figs.F); Sewell, 1929 (part., p.124, figs.F); Sewell, 1947 (p.103); 1948 (p.328, 530, 531, 534, 540, 541, 542, 552, 562); Vervoort, 1957 (p.73, Rem.); Gardner & Szabo, 1982 (p.248, figs.F); Bradford & Jillett, 1980 (p.80); Markhaseva, 1996 (p.301, 302, Rem.)
Loc: G. d’Aden, Mer Arabe, Is. Maldives, G. du Bengale, IndonÈsie-Malaisie, off Hokkaido SE, Californie
Lg.: (143) F: 4,5
Rem.: Cf. Undeuchaeta intermedia

Undeuchaeta dubia    Sars, 1905   (F)
Ref.: Sars, 1905 b (p.15, Rem.F); Markhaseva, 1996 (p.262)
Rem.: Cf. Pseudochirella dubia

[1] Undeuchaeta incisa  Esterly, 1911   (F,M)    [Figs]

[2] Undeuchaeta intermedia  A. Scott, 1909   (F,M)    [Figs]

Undeuchaeta japonica    Chiba, 1956   (F)
Ref.: Chiba, 1956 (p.48,49, figs.F); Furuhashi, 1965 (p.22)
Loc: off Japon
Lg.: (536) F: 1,34
Rem.: non Undeuchaeta. Cf.: ? (voir spp. inc. sedis)

Undeuchaeta lobata    Sars, 1907   (F)
Ref.: Sars, 1907 a (p.11, Rem.F)
Rem.: Pseudochirella lobata

Undeuchaeta magna    Tanaka, 1957   (F)
Ref.: Tanaka, 1957 b (p.203, Descr.F, figs.F); Paiva, 1963 (p.39, figs.F); 1969 (p.266, figs.F); Park, 1978 (p.182, 183, Rem.); Bradford & Jillett,1980 (p.80); Markhaseva, 1996 (p.302)
Loc: Japon (Izu), Indien E, Is. du Cap Vert
Lg.: (73) F: 6,29; (103) F: 6,03
Rem.: ? Cf. Undeuchaeta incisa

[3] Undeuchaeta major  Giesbrecht, 1888   (F,M)    [Figs]

Undeuchaeta minor    Giesbrecht, 1888   (F,M)
Syn.: Undeuchaeta minor Giesbrecht, 1888; 1892 (p.228, 232, figs.F)
Ref.: Willey, 1918 (p.187, figs.M); Vervoort, 1957 (p.71); Park, 1978 (p.182); Bradford & Jillett, 1980 (p.80); Markhaseva, 1996 (p.310)
Rem.: Cf. Undeuchaeta plumosa

Undeuchaeta obtusa    Sars, 1905   (F)
Ref.: Sars, 1905 b (p.13, Rem.F)
Loc: Atlant., Médit.
Rem.: Cf. Pseudochirella obtusa

Undeuchaeta palliata    Sars, 1907   (F)
Ref.: Sars, 1907 a (p.11, Rem.F)
Loc: Açores
Rem.: Cf. Pseudochirella palliata

[4] Undeuchaeta plumosa  (Lubbock, 1856)   (F,M)    [Figs]

Undeuchaeta pustulifera    Sars, 1905   (F)
Ref.: Sars, 1905 b (p.14, RemF)
Rem.: Cf. Pseudochirella pustulifera

Undeuchaeta scopularis    Sars, 1905   (F)
Ref.: Sars, 1905 b (p.14, Rem.F)
Rem.: Cf. Pseudochirella scopularis

Undeuchaeta spectabilis    Sars, 1900   (F,M)
Ref.: Sars, 1900 (p.59, figs.F,M)
Rem.: Cf. Pseudochirella spectabilis

Undeuchaeta superba    With, 1915   (F,M)
Ref.: With, 1915 (p.137); Sewell,1948 (p.564, Rem.); Bradford & Jillett, 1980 (p.80); Vaupel Klein, 1984 a (p.54); Markhaseva, 1996 (p.302)
Rem.: non Cf. Pseudochirella superba ; Cf. Undeuchaeta incisa

[5] Undeuchaeta sp.  Mulyadi, 2004   (F)    [Figs]
Undinopsis Sars, 1902 ( Aetideinae )
Rem.: type: Undinopsis bradyi Sars,1902 Cf. Bradyidius
(30) Valdiviella Steuer, 1904 (? Aetideidae, Aetideinae )
Rem.: Type: Valdiviella oligarthra Steuer,1904. Total: 7 spp.
For Tanaka (1957 b, p.205) the genus Valdiviella was created by Steuer (1904) to accomodate a new species (V. oligarthra which is closely related to Euchaeta and also to some genera of Aetideidae.
According to Steuer, the genus has the mandible similar in structure to those of Gaetanus and Chiridius; Mx1 as in Undeuchaeta; Mx2 as in Aetideus, thus the genus Valdiviella is regarded as a member of the family Aetideidae, whereas Sars (1925, p.98) doubts of this justification. A. Scott states that ''the genus is closely related to Euchaeta, but easily recognised by its bifurcate rostrum; the incomplete segmentation of the exopodites of P1 and P2, and indistinctly 3-segmented endopodites of P3 and P4''.
- The genus has general appearance as in Euchaeta; head and 1st thoracic segment fused, 4th and 5th thoracic segments fused; posterior margin of last thoracic segment rounded; abdomen 4-segmented; appendicular seta short; endopod of A2 about as long as exopod; endopod of Md about as long as exopod;
- Mx1 differs from that of Euchaeta : setae on endopod and 2nd basal segment much reduced, endopod with only 3 setae, 2nd basal with 3 setae whereas that of Euchaeta with 3+3+3 setae on endopod, and 5 on 2nd basal segment;
- Mx2 resembles that of Aetideidae, setae on 5th lobe strong; Mxp resembles that of Undeuchaeta and Euchaeta, but row of spinules on anterior margin of 2nd basal segment are situated on the proximal half, wherea, it is on the distal half in Euchaeta, and thet are feeble.
- P1 as in Euchirella : 1st and 2nd exopodal segments fused; endopod of P2 1-segmented, that of P3 2-segmented; P4 exopod and endopod 3-segmented each; P5 absent in female; male P5 resemble those of Chirundina. The genus has a closer relationship to Aetideidae : rostrum resembles that of Aetideopsis or Undinopsis in its bifurcate shape;
Mx1 has the reduced number of setae on endopod and on 2nd basal segment.
- Mx2 as those of Aetideus in having 1 strong seta on 5h lobe (= endite).
- P1 similar to those of Euchirella.
- P2 as in Euchirella or Undeuchaeta.
- The genus has resemblance to Euchaeta: general appearance, structure of A1, Md and Mxp. Thus Valdiviella has the generic characters common both Aetideidae and Euchaetidae; it is intermediate form between Undeuchaeta and Euchaeta. For the author it seems reasonable, as Steuer stated, to accomodate it in the family Aetideidae.
For Vervoort (1957, p.87) the genus, in many respects, takes an intermediate position between the Aetideidae and the Euchaetidae. It approaches the Aetideidae in the structure of the rostrum, swimming legs, in the case of males, the structure of P5. The structure of Mxp shows unmistakable affinities with the Euchaetidae.
The belonging of this genus to this family is discussed by Heptner (1971) and by Zvereva (1975).

Definition after Bradford & Jillett (1980, p.83) Female:
- General appearance as in Euchaeta.
- Rostrum bifurcate.
- Head and pediger segment 1 fused, 4th and 5th pediger segments fused..
- Posterolateral corners of last thoracic segment rounded.
- A1 23-segmented (as in Euchaeta).
- A2 exopod and endopod equal in length.
- Mx1 with reduced setattion on inner lobe 1 (arthrite), endopod and basipodal segment 2 (11, 3, 3 setae respectively); posterior surface of inner lobe 1 with only 1 seta.
- Mx2 as in Aetideus, seta on lobe 5 strong.
- Mxp as in Undeuchaeta and Euchaeta, but row of spinules on anterior margin of basipodal segment 2 situated proximally not distally as in Euchaeta
- Swimming legs with some degree of fusion between proximal segments.
- P5 absent.

[1] Valdiviella brevicornis  Sars, 1905   (F,M)    [Figs]

[2] Valdiviella brodskyi  Zvereva, 1975   (F)    [Figs]

Valdiviella gigas    Brady, 1883   (M)
Syn.: Euchaeta gigas Brady, 1883 (p.65)
Ref.: Sewell, 1929 (p.142, figs. Juv., Rem.: p.146); Vervoort, 1957 (p.86); Bradford & Jillett, 1980 (p.83)
Rem.: Cf. Valdiviella oligarthra

[3] Valdiviella ignota  Sewell, 1929   (M)    [Figs]

[4] Valdiviella imperfecta  Brodsky, 1950   (F)    [Figs]

[5] Valdiviella insignis  Farran, 1908   (F,M)    [Figs]

[6] Valdiviella minor  Wolfenden, 1911   (F,M)    [Figs]

[7] Valdiviella oligarthra  Steuer, 1904   (F,M)    [Figs]
Wilsonidius Tanaka, 1969 ( Aetideinae )
Rem.: type:Wilsonidius alaskaensis Tanaka,1969. Cf.: Chirundina
Wilsonidius alaskaensis    Tanaka, 1969   (F)
Syn.: W. alaskensis Tanaka, 1969 (p.268, Descr.F, figs.F)
Ref.: Bradford & Jillett, 1980 (p.92)
Loc: G d'Alaska (cÙte)
Rem.: Cf. Chirundina alaskaensis

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