Gaetanus simplex - Fiche d'espèce - Copépodes planctoniques marins

Gaetanus simplex Brodsky, 1950 (F,M)

Taxonomy

Ordre Calanoida

détails

Superfamille Clausocalanoidea

détails

Famille Aetideidae

détails

Genre Gaetanus

détails liste des espèces pour ce genre

Abréviations ou symboles

Synonymie

Gaetanus intermedius Campbell, 1930 (p.178, figs.F); Brodsky, 1950 (1967) (p.165, figs.F); Park, 1973 (p.1597, figs.F,M); Coyle & al., 1990 (p.763); Hattori, 1991 (tab.1, Appendix); Razouls & al., 2000 (Appendix); Hernandez- Trujillo & Esqueda-Escarcega, 2002 (in Appendix); Park, W & al., 2004 (p.464, tab.1); Kosobokova & al., 2007 (p.929: Tab.7); Andronov, 2014 (p.36, fig.: A2);
Gaetanus campbellae Park, 1975 a (p.12, 13)
Gaetanus armiger : Davis, 1949 (p.28, figs.F)

Références

Liste des auteurs étudiés

Brodsky, 1950 (1967) (p.164, figs.F,M); Vervoort, 1963 b (p.129-130: Rem.); Vaupel-Klein, 1970 (p.13, figs.F,M); Morris, 1970 (p.2300, 2304, Rem.); Minoda, 1971 (p.24); Park, 1975 a (p.10); Bradford & Jillett, 1980 (p.48: Rem.); Markhaseva, 1996 (p.196, figs.F,M, Rem.)

Figures

Planche 1 issued from : E.L. Markhaseva in Proc. Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.199, Fig.156].
Female (from Kuril Trench); Male (idem). Ce: forehead (lateral).

Species Gaetanus simplex - Planche 2 of morphological figures

Planche 2 issued from J.C. von Vaupel-Klein in Zool. Verh. Leiden, 1970, 110. [p.14, Fig.3].
Female (from NE Pacific: Station \"P\"); a-c, dorsal view of the last thoracic somite and urosome of three specimens; d-f, forehead (right lateral view of three specimens)

Species Gaetanus simplex - Planche 3 of morphological figures

Planche 3 Issued from : J.C. von Vaupel-Klein in Zool. Verh. Leiden, 1970, 110. [p.16, Fig.4, a-e];
Male: a, last thoracic segment and urosome (dorsal, specimen 1); b, idem (specimen 2); c, serrated caudal margin of the 2nd thoracic somite; d, forehead (specimen 1, lateral view); e, idem (specimen 2).
Nota: The caudal margins of the urosomal somites, with exception of the genital somite, are minutely serrated; In the female the caudal margins of the genital, as well as of the 2nd and 3rd urosomal somites, are serrated, but much less distinctly.

Planche 4 Issued from : K.A. Brodskii in Calanoida of the Far Eastern Seas and Polar Basin of the USSR. Opred. Fauna SSSR, 1950, 35 (Israel Program for Scientific Translations, Jerusalem, 1967) [p.165, Fig.77].
Female (from NW Pacif.): habitus (dorsal and lateral right side); forehead (lateral); urosome (ventral); S1, P1; S5B1, distal inner margin of basipodal segment 1 of P4.

male: S2, P5.

Species Gaetanus simplex - Planche 5 of morphological figures

Planche 5 issued from : T. Park in J. Fish. Res. Board Can., 1973, 30. [p.1598, Fig.1]. As Gaetanus intermedius.
Female (from Washington Sound): A-B, habitus (dorsal and lateral, respectively); C, forehead (lateral); D, rostrum); E, A1; F, A2; G, Md; H, Mx1; I, Mx2.
Nota: Proportional lengths of prosome and urosome about 81:19. Forehead with a small cephalic spine. Frontal eminence bearing suprafrontal sensilla small. Rostrum simple, with a minutely bifurcated tip. 1st metasomal segment and cephalosome fused, Th4 and Th5 fused. Posterolateral corner of metasome with a spiniform process, extending a little beyond middle of genital segment; A1 reaching to about distal end of genital segment. 2nd exopodal segment of A2 with a large internal process carrying 1 seta. basis of Md with 2 subequal setae. Mx1 with 14 setae on 1st, 4 each on 2nd and 3rd inner lobes, 5 on basis; 14 on endopod; 11 on exopod; 9 on outer lobe. Coxa of Mxp without a lamelliform outgrowth.

Planche 6 Gaetanus simplex female:
1 - Anterior part of cephalon with frontal spine.
2 - Exopodal segment 1 of A2 without seta; exopodal segment 2 with 2 setae (1 medial situated and 1 distal). 2nd internal lobe of Mx1 with 4 setae. Exopod of P1 always with 2 external spines.
3 - Mxp protopodite without lateral plate.
4 - Exopod of P1 2-segmented, or indistinctly 3-segmented.

Planche 7 Gaetanus simplex male:
1 - Cephalon with frontal spine.
2 - Exopodal segment 3 of left P5 prolonged, stylet-like, never bilobated. It is always longer than exopodal segment 2.
3 - Frontal spine is in anterior part of cephalon dorsally (lateral view), well visible.
4 - Spines on last thoracic segment long, longer than half length of genital segment.

Planche 8 Issued from : V.N. Andronov in Russian Acad. Sci. P.P. Shirshov Inst. Oceanol. Atlantic Branch, Kaliningrad, 2014. [p.36, Fig.9, 5]. As Gaetanus intermedius after Park, 1973.
2, distal segment of exopod of A2.

Références complémentaires

Liste des auteurs étudiés

Björnberg, 1973 (p.324, 386); Peterson & Miller, 1976 (p.14, Table 1, 3, abundance vs interannual variations); Deevey & Brooks, 1977 (p.256, tab.2, Station "S"); Peterson & Miller, 1977 (p.717, Table 1, seasonal occurrence); Hernandez-Trujillo, 1991 (1993) (tab.I); Bragina, 1999 (p.195); Yamaguchi & al., 2002 (p.1007, tab.1); Yamaguchi & al., 2004 (p.479, tab.2); Sedova & Grigoriev, 2005 (p.112); Gaard & al., 2008 (p.59, Table 1, N Mid-Atlantic Ridge); Galbraith, 2009 (pers. comm.); Homma & Yamaguchi, 2010 (p.965, Table 2); Homma & al., 2011 (p.29, Table 2, 4, 5, abundance, feeding pattern: suspension feeders); Abe & al., 2012 (p.100, temporal & vertical changes, gut content); Takenaka & al., 2012 (p.1669, Table 1, bioluminescence assay); Ohashi & al., 2013 (p.44, Table 1, Rem.); Coyle & al., 2014 (p.97, table 3)

Distribution

NZ: 7

Carte de distribution de Gaetanus simplex par zones géographiques

Localisations

Glossaire géographique

off Bermuda: Station "S" (32°10'N, 64°30'W) (in Deevey & Brooks, 1977), off S Iceland, Japan Sea, Japan (off Sanriku, off E Hokkaido), Station Knot, Okhotsk Sea, Kuril-Kamchatka, off SE Kuril Is., S Aleutian Is., S Bering Sea, S Aleutian Basin, Aleutian Trench, station "P", G. of Alaska (Auke Bay, Icy Strait), Pacif. (central sub-Arct.), British Columbia, Strait of Georgia, Washington Sound, Oregon (off newport), W Baja California, S Peru (in Björnberg, 1973).

Type locality: Pacific (NW part).

Citations

N: 30

Dimensions (mm)

Références de auteurs concernant les dimensions

(22) F: 3,2; M: 3,1; (37) F: 3,5-3,2; M: 3,1-2,65; (92) F: 3,47-3,15; (205) F: 3,5; M: 3,4; (208) F: 3,64-3,5; M: 3,55; {F: 3,15-3,64; M: 2,65-3,55}

Remarques

épi-abyssopélagique.
La signalisation de cette espèce en antarctique par Hopkins (1985, p.167) et Hopkins & Torres (1988, p.82, tab.2) dans la mer de Weddell) est probablement une confusion avec Gaidius intermedius Wolfenden,1905 = Gaetanus brevispinus (Sars,1900) et probablement aussi pour Rau & al., 1991 (p.1, fig.1);

Voir aussi les remarques en anglais

Dernière mise à jour : 15/02/2019