Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Phaennidae ( Family )
            Onchocalanus ( Genus )
Onchocalanus wolfendeni  Vervoort, 1950   (F,M)
Syn.: Xanthocalanus magnus : Wolfenden,1908 (p.37, figs.F);
Onchocalanus magnus : Wolfenden, 1911 (p.275, figs.F); Cépède, 1914 (p.152)
Ref.:
Vervoort, 1950 a (p.22, figs.F); 1951 (p.93, Rem.); 1965 a (p.391, 396); Bradford, 1971 b (p.22, figs.F); Park, 1983 a (p.347, Redescr.F,M, figs.F,M); Razouls, 1994 (p.108, figs.F,M); Bradford-Grieve & al., 1999 (p.880, 929, figs.F); Park & Ferrari, 2009 (p.143, Table 3, Appendix 1, biogeography from Southern Ocean)
Species Onchocalanus wolfendeni - Plate 1 of morphological figuresissued from : T. Park in Antarct. Res. Ser. Washington, 1983, 39 (5). [p.349, Fig.20].
Female: a, habitus (dorsal); b, idem (lateral left side); c, genital segment (lateral left side); d, idem (ventral); e, forehead (lateral); f, rostrum (anterior); g, Mxp; h, P1 (posterior); i, P1 (anterior); j, P2 (posterior); k, P5 (posterior).


Species Onchocalanus wolfendeni - Plate 2 of morphological figuresissued from : T. Park in Antarct. Res. Ser. Washington, 1983, 39 (5). [p.350, Fig.21].
Male: a, forehead (lateral); b, last thoracic segments with P5 and urosome (lateral left side); c, last thoracic segments and urosome (dorsal); d, forehead (dorsal); e, rostrum (anterior); f, Mx2; g, P1 (anterior); h, P5 (posterior).


Species Onchocalanus wolfendeni - Plate 3 of morphological figuresIssued from : W. Vervoort in Zool. Verh., Leiden, 1950, 10. [p.23, Fig.9].
Female (from ± 66°S, 11°W): a, habitus (dorsal); b, idem (lateral left side); c, left P5 (posterior aspect).


Species Onchocalanus wolfendeni - Plate 4 of morphological figuresIssued from : W. Vervoort in Zool. Verh., Leiden, 1950, 10. [p.24, Fig.10].
Female (from ± 66°S, 16°W): a, posterior part of cephalothorax and urosome (dorsal); b, cephalon (lateral); c, right Mx2.

Nota: The abdominal segments and furca in the proportional lengths 45:23:16:4:12 = 100. Anal flap just visible behind margin of 3rd urosomal segment.


Species Onchocalanus wolfendeni - Plate 5 of morphological figuresIssued from : W. Vervoort in Zool. Verh., Leiden, 1950, 10. [p.25, Fig.11].
Female (from ± 66°S, 16°W): a, posterior part of cephalothorax and urosome (lateral left side); b, P1 (posterior).


Species Onchocalanus wolfendeni - Plate 6 of morphological figuresIssued from : J.M. Bradford in N.Z. Oceanogr. Inst., 1971, 206, Part 8, No 59. [p.21, Figs.72, 73].
Female (from 75°09'S, 171°00'W): 72, P5; 73, P1.
Scale bar: 100 µm.

Nota: Cephalosome without crest; a short terminal segment on P5; a slightly swollen genital segment; rounded postero-lateral thoracic borders; an increased number of spines on the posterior surface of P1

Compl. Ref.:
Hopkins, 1985 (p.197, Table 1, gut contents); Hopkins & Torres, 1988 (tab.1); Razouls & al., 2000 (p.343, tab. 2, 5, Appendix); Schnack-Schiel & al., 2008 (p.1045: Tab.2)
NZ: 2

Distribution map of Onchocalanus wolfendeni by geographical zones
Loc:
Antarct. (Croker Passage, Peninsula, SW & SE Atlant., Weddell Sea, Indien, SW & SE Pacif., Ross Sea), sub-Antarct. (SE Pacif.)
N: 10
Lg.:
(10) F: 6; (15) F: 6,75-6; M: 5,66-5,33; (31) F: 6,75; (64) F: 6,75; (102) F: 6,2; {F: 6,00-6,75; M: 5,33-5,66}
Rem.: bathypelagic.
Sampling depth (Antarct., sub-Antarct.) : 200-1000 m.
In general appearance the body resembles that of O. magnus strikingly much, but extreme tip broadly rounded (in this respect totally different from O. magnus.
Last update : 03/02/2015
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2022. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed September 29, 2022]

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