Species Card of Copepod
Calanoida ( Order )
    Arietelloidea ( Superfamily )
        Augaptilidae ( Family )
            Euaugaptilus ( Genus )
Euaugaptilus filigerus  (Claus, 1863)   (F,M)
Syn.: Hemicalanus filigerus Claus,1863 (p.179);
Augaptilus filigerus : Giesbrecht, 1892 (p.400, 413, 770, figs.F,M); Giesbrecht & Schmeil, 1898 (p.121, Rem. F,M); I.C. Thompson, 1903 a (p.28); Farran, 1908 b (p.77, Rem.); A. Scott, 1909 (p.136, Rem.); Wolfenden, 1911 (p.341); Pesta, 1920 (p.533); Rose, 1924 d (p.481); Wilson, 1932 a (p.135, figs.M); Euaugaptilus filiger : Sars, 1925 (p.279, figs.F,M); Rose, 1933 a (p.228, figs.F,M); 1937 (p.165, figs.F, Rem.); Massuti Alzamora, 1942 (p.111); Grice & Hülsemann, 1965 (p.224); Vervoort, 1965 (p.137, Rem.); Mazza, 1966 (p.72); Pavlova, 1966 (p.44); Deevey, 1971 (p.224); Razouls, 1972 (p.95, Annexe: p.82); Roe, 1972 (p.277, tabl.1, tabl.2); Björnberg, 1973 (p.348, 385); Vives & al., 1975 (p.50, tab.II, XII); Hure & al., 1980 (p.298); Björnberg & al.,1981 (p.653, figs.F,M); Roe, 1984 (p.358); Lozano Soldevilla & al., 1988 (p.60); Scotto di Carlo & al., 1991 (p.271); Neumann-Leitao & al., 1999 (p.153, tab.2); Lapernat, 2000 (tabl.3, 4); Vukanic, 2003 (p.139, tab.1);
Augaptilus depressus Esterly, 1913 (p.187, figs.F); Brodsky, 1950 (1967) (p.372, figs.F); Vives, 1982 (p.294); Kovalev & Shmeleva, 1982 (p.85); Scotto di Carlo & al., 1984 (1045); Hure & Krsinic, 1998 (p.102); Suarez-Morales & Gasca, 1998 a (p108); Hernandez-Trujillo & Esqueda-Escarcega, 2002 (in Appendix);
Euaugaptilus depressus : Sewell, 1948 (p.558, 563);
Augaptilus romanus Esterly,1913 (p.188, figs.F,M); Suarez-Morales & Gasca, 1998 a (p108); Hernandez-Trujillo & Esqueda-Escarcega, 2002 (in Appendix);
Euaugaptilus romanus : Sewell, 1948 (p.558)
Ref.:
Farran, 1929 (p.209, 269); Sewell, 1932 (p.321); Farran, 1936 a (p.114); Jespersen, 1940 (p.61); Wilson, 1942 a (p.184); Lysholm & al., 1945 (p.38); Sewell, 1947 (p.197, 199, 200); 1948 (p.349, 504, 509, 522, 547, 567); Tanaka, 1964 b (p.51, figs.F,M); De Decker & Mombeck, 1964 (p.12); Grice & Hulsemann, 1967 (p.18); Matthews, 1972 (p.30, Rem.); Tanaka & Omori, 1974 (p.211, figs.F); Bradford-Grieve & al., 1999 (p.882, 940, figs.F,M); Bradford-Grieve,1999 b (p.49, figs.F,M, figs.171, 190); Vives & Shmeleva, 2007 (p.196, figs.F,M, Rem.); Matsuura & al., 2010 (p.2098, Table 4, fig.10: Mx2, Mxp)
Species Euaugaptilus filigerus - Plate 1 of morphological figuresissued from : O. Tanaka in Publs Seto Mar. Biol. Lab., 1964, XII (1). [p.52, Fig.198].
Female: a, habitus (dorsal); b, foreheas (left lateral side); c, rostrum (dorsal view); d, last thoracic segment and urosome (left lateral side); e, A2; f, Md (mandibular plp and masticatory edge, respectively); g, Mx1; h, P1; i, P5.

Male: j, P5 (blown: in the right leg the 2nd segment of the exopod has a characteristic process on the proximal inner margin.
Nota: The urosome segments and furca are in the proportional lengths as 26:16:13:11:18:16 = 100.


Species Euaugaptilus filigerus - Plate 2 of morphological figuresissued from : J.M. Bradford-Grieve in The Marine Fauna of New Zealand: Pelagic Calanoid Copepoda. National Institute of Water and Atmospheric Research (NIWA). NIWA Biodiversity Memoir, 111, 1999. [p.51, Fig.23].
Female: A, habitus (dorsal); B, anterior head (lateral left side); C, genital somite (lateral left side); D, rostrum (frontal view); E, Mx1; F, P1; G, exopod segments 1 and 2 of P3; H, P5.


Species Euaugaptilus filigerus - Plate 3 of morphological figuresissued from : O. Tanaka & M. Omori in Publs Seto Mar. Biol. Lab., 1974, XXI (3/4). [p.211, Fig.9].
Female: a, Mx1; b, Mx1 (specimen 5.30 mm in length which lack a seta on the 3rd inner lobe).


Species Euaugaptilus filigerus - Plate 4 of morphological figuresissued from : O. Tanaka & M. Omori in Publs Seto Mar. Biol. Lab., 1974, XXI (3/4). [p.199, Fig.2,b].
Female: b, mandibular teeth.


Species Euaugaptilus filigerus - Plate 5 of morphological figuresIssued from : G.O. Sars in Résult. Camp. Scient. Prince Albert I, 69, pls.1-127 (1924). [Pl.XC, figs.1-15]. As .
Female: 1, habitus (dorsal); 2, idem (lateral left side); 3, rostrum (ventral view); 4, A2; 5, labrum; 6, Md; 7, Mx1; 8, Mx2; 9, Mxp; 10, P1; 11, P3; 12, P4; 13, P5.

Male: 14, P5; 15, urosome (dorsal).


Species Euaugaptilus filigerus - Plate 6 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.39, Fig.49]. As Augaptilus filigerus.
Female: 49, urosome (ventral).


Species Euaugaptilus filigerus - Plate 7 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.27, Fig.34]. As Augaptilus filigerus.
Female: exopod of P5. Se : outer seta; Si = inner seta.


Species Euaugaptilus filigerus - Plate 8 of morphological figuresissued from : M. Rose in Annls Inst. océanogr., Monaco, n. ser., 1937, XVII, 2. [p.166, Fig.7]. As Euaugaptilus filiger.
Female (from Alger Bay, Algeria): habitus (dorsal); V, urosome (ventral); D, idem (dorsal); P, idem (profile).


Species Euaugaptilus filigerus - Plate 9 of morphological figuresissued from : M. Rose in Annls Inst. océanogr., Monaco, n. ser., 1937, XVII, 2. [p.168, Fig.8]. As Euaugaptilus filiger.
Female: A1; R, rostrum and filaments (ventral); T, forehead (lateral).


Species Euaugaptilus filigerus - Plate 10 of morphological figuresissued from : M. Rose in Annls Inst. océanogr., Monaco, n. ser., 1937. [p.169, Fig.9]. As Euaugaptilus filiger.
Female: A2; Md.


Species Euaugaptilus filigerus - Plate 11 of morphological figuresissued from : M. Rose in Annls Inst. océanogr., Monaco, n. ser., 1937, XVII, 2. [p.170, Fig.10]. As Euaugaptilus filiger.
Female: Mx1 (as Mx); L. s., labrum.


Species Euaugaptilus filigerus - Plate 12 of morphological figuresissued from : M. Rose in Annls Inst. océanogr., Monaco, n. ser., 1937, XVII, 2. [p.171, Fig.12]. As Euaugaptilus filiger.
Female: Mx2 (as Mxp1); Mxp (as Mxp2); P1 to P5.


Species Euaugaptilus filigerus - Plate 13 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.29, Fig.26]. As Augaptilus filigerus.
Male: 26, P5 (anterior view). Ps = left leg; Pd = right leg.


Species Euaugaptilus filigerus - Plate 14 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.28, Figs.20, 36]. As Augaptilus filigerus.

Male: 20, Md; 36, Md (mandibular blade).


Species Euaugaptilus filigerus - Plate 15 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.28, Fig.27]. As Augaptilus filigerus.

Male: 27, Mxp (anterior view).


Species Euaugaptilus filigerus - Plate 16 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. - Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.28 , Fig.4 ]. As Augaptilus filigerus.
Female: 4, A1 (distal segments)


Species Euaugaptilus filigerus - Plate 17 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. - Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.28 , Figs.10, 13, 14 ]. As Augaptilus filigerus.
Female: 10, Md (mandibular blade); 13, A2 (anterior view); 14, Mx1 (anterior view).


Species Euaugaptilus filigerus - Plate 18 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. - Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.28 , Fig.26 ]. As Augaptilus filigerus.
Female: 26, Mx2 (anterior view).


Species Euaugaptilus filigerus - Plate 19 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. - Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.28 , Fig.28, 29 ]. As Augaptilus filigerus.
Female: 28, P1 (posterior view); 29, P2 (anterior view).
Se = outer seta; St = terminal seta; Ri = endopod; Re = exopod.


Species Euaugaptilus filigerus - Plate 20 of morphological figuresissued from : H. Matsuura, S. Nishida & J. Nishikawa in Deep-Sea Res. II, 2010, 57. [p.2106, Fig.10, i-j].
From Sulu Sea: i, SEM image of button setae on Mx2 and Mxp; j, SEM image of mandible blade.
Nota: Mandible blade like a curved needle, with 4 spiniform teeth (Type-I).


Species Euaugaptilus filigerus - Plate 21 of morphological figuresissued from : J.M. Bradford-Grieve, E.L. Markhaseva & C.E.F. Rocha & B. Abiahy in South Atlantic Zooplankton, Edit. D. Boltovskoy. 1999. Vol.2. Copepoda. [p.1037, Fig. 7.249].
Female: Mx1.

Nota: Endopod of Mx1 absent; outer lobe with 6 setae.


Species Euaugaptilus filigerus - Plate 22 of morphological figuresIssued from : C.O. Esterly in Univ. Calif. Publs Zool., 1913, 11 (10). [Pl. 10, Fig. 7]. As Augaptilus romanus.
Male (from S. California): 7, abdomen (dorsal).
Urosome length : 1.114 mm.

Nota: The head and posterior margins of the are roundedlast thoracic segment.
Rostral filaments slender and delicate and borne on a prominence beak-like eminence which is set in an identation in the front .
Cephalothorax about 4 times as long as the abdomen and furca.
The last abdominal segment is the longest, genital segment is next, then the 2nd, 3rd and 4th in order.
The non-grasping A1 is 25-segmented (5.4 mm long); the portion of the grasping A1 proximal to the geniculation is 17-segmented.
Coloration: transparent and unpigmented.


Species Euaugaptilus filigerus - Plate 23 of morphological figuresIssued from : C.O. Esterly in Univ. Calif. Publs Zool., 1913, 11 (10). [Pl. 11, Figs. 30, 32]. Augaptilus romanus.
Male: 30, A2; Md (mandibular blade).

Nota: The inner ramus of A2 is twice the length of the outer ramus


Species Euaugaptilus filigerus - Plate 24 of morphological figuresIssued from : C.O. Esterly in Univ. Calif. Publs Zool., 1913, 11 (10). [Pl. 12, Figs. 45, 47, 52]. Augaptilus romanus.
Male: 45, exopod of P1; 47, right P5; 52, left P5.
Exopod of P1 length (terminal spine excluded) = 586 µm.


Species Euaugaptilus filigerus - Plate 25 of morphological figuresIssued from : C.O. Esterly in Univ. Calif. Publs Zool., 1913, 11 (10). [Pl. 10, Figs. 11, 20, 26]. As Augaptilus depressus.
Female (from S California): 11, forehead (lateral); 20, abdomen (lateral); 26, 2nd, 3rd and furca (dorsal).

Nota : Body greatly flattened, with rounded head and posterior margins of the thorax.
Rostral filaments unusually long and delicate, and recurved.
Cephalothorax four and one-third times as long as the abdomen (including the furca), and nearly 4 times as long as the greatest breadth.
In the abdomen the genital segment is longer than the other two segments with the furca.
Genital segment about 5 times as long as the 2nd segment and the latter is somewhat shorter than the third.
A1 not quite so long as the cephalothorax.
The inner ramus of A2 about twice as long as the outer and extends back half way to the posterior edge of the cephalothorax ; the larger plumose bristles are iridescent.
Cephalothorax length = 4.3 mm.
Body coloration transparent, except the digestive tract filled with light yellowish material.


Species Euaugaptilus filigerus - Plate 26 of morphological figuresIssued from : C.O. Esterly in Univ. Calif. Publs Zool., 1913, 11 (10). [Pl. 11, Figs. 33, 38, 42]. As Augaptilus depressus.
Female: 33, Md (mandibular blade); 42, outline pf Mxp (without bristles).

Nota : The bristles of Mx1 and Mxp are provided with the ‘’buttons’’ which are exceedingly minute ; only about the distal eighth of any bristle is so equipped, the remainder of bristles is spinose.


Species Euaugaptilus filigerus - Plate 27 of morphological figuresIssued from : C.O. Esterly in Univ. Calif. Publs Zool., 1913, 11 (10). [Pl. 12, Figs. 44, 54]. As Augaptilus depressus.
Female: 44, exopd of P1; 54, P5.
Exopod of P1 (except terminal spine) = 571 µm. Exopodite of P5 (without terminal spine) = 686 µm.

Compl. Ref.:
C.B. Wilson, 1950 (p.205); Morris, 1970 (p.2301); Itoh, 1970 (tab.1); Park, 1970 (p.477); Deevey & Brooks, 1977 (p.156, tab.2, Station "S"); Guangshan & Honglin, 1984 (p.118, tab.); Heinrich, 1990 (p.18); Shih & Young,1995 (p.68); Padmavati & al., 1998 (p.347); Suarez-Morales & Gasca, 1998 a (p108); Lopez-Salgado & al., 2000 (tab.1); Holmes, 2001 (p.11); Hsiao & al., 2004 (p.325, tab.1); Galbraith, 2009 (pers. comm.); Williamson & McGowan, 2010 (p.273, Table 3, Pacific central gyres: N and S); Matsuura & al., 2010 (p.2098, Table 3, figs.7, 8, vertical distribution); Dias & al., 2010 (p.230, Table 1); Mazzocchi & Di Capua, 2010 (p.424); in CalCOFI regional list (MDO, Nov. 2013; M. Ohman, comm. pers.); Belmonte, 2018 (p.273, Table I: Italian zones)
NZ: 19

Distribution map of Euaugaptilus filigerus by geographical zones
Species Euaugaptilus filigerus - Distribution map 3issued from : H. Matsuura, S. Nishida & J. Nishikawa in Deep-Sea Res. II, 2010, 57. [p.2104, Fig.7].
Vertical distribution of Euaugaptilus filigerus in the Sulu Sea, compared with those in the Celebes Sea.
Loc:
South Africa (E), off E Trindade Is., off N St. Helena Is., G. of Guinea, off NW Cape Verde Is., Canary Is., Morocco-Mauritania, off Madeira, off Portugal, off W Cape Finisterre, Azores, Brazil, off Macaé, off Natal, off Guyana, Caribbean Sea, G. of Mexico, Sargasso Sea, off Bermuda (Station "S"), off New Jersey, S Iceland, off W Ireland, North Sea, Ibero-moroccan Bay, Medit. (Alboran Sea, Algiers, Banyuls, Monaco, Ligurian Sea, Tyrrhenian Sea, Messina, Adriatic Sea, Eastern Basin, S Aegean Sea), Arabian Sea, W Indian, Laccadive Is., Indonesia-Malaysia, Celebes and Sulu Seas, China Seas (East China Sea, South China Sea), E Taiwan, Japan (Izu), off N Hawaii, Vancouver Is., California, Pacif. (W equatorial), Pacific (central gyres: N and S), Australia (Great Barrier), New Zealand (N North Island, SE South Island), Pacif. (SE tropicical), S Easter Is., N Chile
N: 52
Lg.:
(1) F: 6,8; (16) F: 6,57-4,5; M: 5,3-4,5; (34) F: 5,4; (35) F: 5,75; (44) F: 6,6; (45) F: 4,9-4,5; M: 4,5-4; (46) F: 4,9; M: 4,5-4,1; (68) F: 7,64-5,15; M: 4,58; (69) F: 5,02; 7,59; M: 4,14; (144) F: 5,3; M: 4,5; (199) F: 7,2-5,24; M: 5,76-4,8; (228) F: 5,1; (449) F: 4,9; M: 4,5-4,1; (909) F: 6,3; {F: 4,50-7,64; M: 4,00-5,76}
Rem.: epi-meso-bathypelagic. Recorded quite often at depths between 100 and 500 m, also deeper and occasionally shallower (Matthews, 1972). Sargasso Sea: 0-1500 m (Deevey & Brooks, 1977, Station "S").
For Esterly (1913, p.188) while this specimen was taken in the same haul with Augaptilus californicus [= Eaugaptilus filigerus], there is no other reason, so far as I can see, for considering the two as male and female of the same species.
Rose (1937) points to some apparent differences between Atlantic and Mediterranean specimens (geographical races ?).
For Itoh (1970 a, fig.2, from co-ordonates) the Itoh's index value from mandibular gnathobase = 1520.

In ''squamatus" Group after Matthews (1972, p.64) {See remarks in Euaugaptilus genus}.
Last update : 04/12/2020
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