Fiche d'espèce de Copépode
Calanoida ( Ordre )
    Clausocalanoidea ( Superfamille )
        Aetideidae ( Famille )
            Valdiviella ( Genre )
Valdiviella oligarthra  Steuer, 1904   (F,M)
Syn.: Euchaeta gigas Brady, 1883 (p.65);
Valdiviella gigas : Sewell, 1913 (p.354, figs.F); 1929 (p.142, Rem. juv.);
Valdiviella insignis : Heptner, 1971 (p.113, figs. juv.M);
No Valdiviella oligarthra M : Tanaka & Omori, 1967 (p.247)
Steuer, 1904 (p.593, Descr.F, figs.F); Wolfenden, 1911 (p.247, Rem.); Sewell, 1929 (p.140, figs.F,M); Lysholm & al., 1945 (p.21); Sewell, 1947 (p.110); Vervoort, 1957 (p.86, Rem.); Tanaka, 1957 b (p.205, figs.F; Tanaka & Omori, 1967 (p.244, non M); 1970 b (p.153); Park, 1978 (p.191, figs.F,M); Bradford & Jillett, 1980 (p.83); Chihara & Murano, 1997 (p.690, Pl.50: F,M); Bradford-Grieve & al., 1999 (p.880, 927, figs.F,M); Vives & Shmeleva, 2007 (p.609, figs.F,M, Rem.)
Espèce Valdiviella oligarthra - Planche 1 de figures morphologiquesissued from : Tanaka O. in Publ. Seto Mar. Biol. Lab., 1957, 6 (2). [Fig.61, p.206].
Female (from Suruga): a, habitus (dorsal aspect); b, head (lateral aspect, left side); c, last thoracic segment and urosome (lateral aspect); d, exopodite and endopodite of Mx1; e, Mxp.; f, P1; g, P2.

Nota Female:
- Cephalothorax about 2 times the abdomen length (6.38 : 3.19)
- Head and 1st pediger segment incompletely separate, 4th and 5th pedigers fused.
- Posterolateral corners of last thoracic segment rounded.
- Rostrum 2-pointed, shot.
- Abdome 4-segmented; segments and caudal rami in proportional lengths 40 : 23 : 19 : 8 : 10 = 100.
- Genital segment swollen ventrally; genital area indented in lateral view..
- 2nd and 3rd abdominal segments with a tuft of hairs ventrally near proximal margin.
- Abdominal segments 1 to 3 fringed with fine teeth on distal margin.
- Caudal rami as long as wide.
- A1 23-segmented, extends to distal end of 3rd thoracic segment.
- P1 exopod 2-segmented and endopod 1-segmented.
- P2 to P4 with each exopodite 2-segmented (segments 1 and 2 of exopodite fused.
- P2 endopod 1-segmented.
- P3 and P4 endopod 2-segmented.

Espèce Valdiviella oligarthra - Planche 2 de figures morphologiquesissued from : T. Park in Antarctic Res. Ser. Washington, 1978, 27. [p.192, Fig.59].
Female: A, habitys (dorsal view); B, posterior part of metasome and urosome (dorsal view); C, idem (left side); D, forehead (lateral); E, genital segment (ventral); F, rostrum (anterior); G, outer lobe of Mx1; H, P1; I, P2. P1-2: legs (anterior)

Espèce Valdiviella oligarthra - Planche 3 de figures morphologiquesissued from : T. Park in Antarctic Res. Ser. Washington, 1978, 27. [p.193, Fig.60].
Male: A, habitus (left side); B, forehead (lateral); C, last metasomal and genital segments (lateral); D, A2; E, P1; F, P2; G, P5; H, exopod and endopod of left P5, medial; I, first exopodal segment and endopod of right P5, medial. P1-5: legs (anterior).

Espèce Valdiviella oligarthra - Planche 4 de figures morphologiquesissued from : R.B.S. Sewell in Mem. Indian Mus., 1929, X. [p.141, Fig.54].
Female (from off SE Sri-Lanka): a, habitus (lateral left side).

Male: b, P5.
Nota: Md devoid of any biting edge; endopod with 6 setae; exopod with 9 setae, of which two very short, on its 2nd segment and none on its 1st. Mx1 much reduced; outer lobe with 11 setae of which the 11th ivery short; endopod with 3 setae. Mx2 vestigial; in the basal segment the first three lobes reduced to mere prominences devoid of setae; the 4th and 5th lobes with 2 setae each; endopod with 5 setae.

Espèce Valdiviella oligarthra - Planche 5 de figures morphologiquesissued from : M.V. Heptner in Trudy. Inst. Okeanol., 1971, 92. [p.114, Fig.19]; As Valdiviella insignis. Heptner thinks this form is a copepodid V female in the Kuril-Kamchatka Trench( (3800-7100 m). comm. pers..
Body length: 9 mm.

Espèce Valdiviella oligarthra - Planche 6 de figures morphologiquesissued from : A. Steuer in Zool. Anz., 1904, 27 (19. [p.595, Figs.1-3].
Female: 1, P1; 2, P2; 3, endopod of P4.

Nota: A1 23 segmented (segments 8 and 9 fused, 24 and 25 fused), lengt of segments in 0.01 mm: 27, 20,17,19,24, 21, 19, 23, 7, 7, 8, 13, 15, 21, 29, 34, 32, 37, 34, 26, 24, 26, 31.

Espèce Valdiviella oligarthra - Planche 7 de figures morphologiquesissued from : Tanaka O. in Publ. Seto Mar. Biol. Lab., 1957, 6 (2). [p.207].
Female A1: Proportional lengths of segments.
- A1 23-segmentrd; extends to distal end of 3rd thoracic segment.

Ref. compl.:
Sewell, 1948 (p.331, 500, 516, 521, 527); Grice & Hulsemann, 1967 (p.15); 1968 (tab.2); Park, 1970 (p.476); Björnberg, 1973 (p.325, 389); Suarez-Morales & Gasca, 1998 a (p.109); Razouls & al., 2000 (p.343, Appendix); Park & Ferrari, 2009 (p.143, Table 4, Appendix 1, biogeography); Medellin-Mora & Navas S., 2010 (p.265, Tab. 2);
NZ: 11

Carte de distribution de Valdiviella oligarthra par zones géographiques
Antarct. (SE Pacif.), sub-Antarct. (SW Atlant., SE Pacif.), South Africa, off E St. Paul Is., G. of Guinea, off NW Cape Verde Is., Canary Is., Atlant. (tropical, N temperate), Caribbean Sea, Caribbean Colombia, G. of Mexico, Arabian Sea, Laccadive Is., off Seychelles, W Indian, off E Sri Lanka, Bay of Bengal, Flores Sea, Japan (Izu), SE Pacif., off Juan Fernandez Is., Chile (N & S).
N: 15
(11) F: 10; (29) F: 7,2; M: 6,2; (56) F: 9,57; (70) F: 9,8-9,5; (112) F: 9,78-9,4; (866) M: 6,02-9,08; (1034) F: 9,0; {F: 7,20-10,00; M: 6,02-9,08}
Rem.: bathypélagique.
Sampling depth (Antarct., sub-Antarct.): 0-2000 m.
Voir aussi les remarques en anglais
Dernière mise à jour : 22/04/2021

 Toute utilisation de ce site pour une publication sera mentionnée avec la référence suivante :

Razouls C., Desreumaux N., Kouwenberg J. et de Bovée F., 2005-2024. - Biodiversité des Copépodes planctoniques marins (morphologie, répartition géographique et données biologiques). Sorbonne Université, CNRS. Disponible sur [Accédé le 25 mai 2024]

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