Valdiviella oligarthra - Fiche d'espèce - Copépodes planctoniques marins

Valdiviella oligarthra Steuer, 1904 (F,M)

Taxonomy

Ordre Calanoida

détails

Superfamille Clausocalanoidea

détails

Famille Aetideidae

détails

Genre Valdiviella

détails liste des espèces pour ce genre

Abréviations ou symboles

Synonymie

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)

Références

Liste des auteurs étudiés

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.)

Figures

Planche 1 issued 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.

Species Valdiviella oligarthra - Planche 2 of morphological figures

Planche 2 issued 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)

Species Valdiviella oligarthra - Planche 3 of morphological figures

Planche 3 issued 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).

Species Valdiviella oligarthra - Planche 4 of morphological figures

Planche 4 issued 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.

Species Valdiviella oligarthra - Planche 5 of morphological figures

Planche 5 issued 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.

Species Valdiviella oligarthra - Planche 6 of morphological figures

Planche 6 issued 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.

Planche 7 issued 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.

Références complémentaires

Liste des auteurs étudiés

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);

Distribution

NZ: 11

Carte de distribution de Valdiviella oligarthra par zones géographiques

Distribution map of Valdiviella oligarthra for the Zone Indian Ocean

Distribution map of Valdiviella oligarthra for the Zone Antarctic and for the Zone Sub-Antarctic

Localisations

Glossaire géographique

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).

Citations

N: 15

Dimensions (mm)

Références de auteurs concernant les dimensions

(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}

Remarques

bathypélagique.
Sampling depth (Antarct., sub-Antarct.): 0-2000 m.

Voir aussi les remarques en anglais

Dernière mise à jour : 22/04/2021