Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Phaennidae ( Family )
            Xanthocalanus ( Genus )
Xanthocalanus sp.  Bradford & Wells, 1983   (juv. M)
Bradford & Wells, 1983 (p.3, Descr.juv.M, figs. juv.M)
Species Xanthocalanus sp. - Plate 1 of morphological figuresissued from : J.M. Bradford & J. Wells in Polar Biol., 1983, 2. [p.4, Fig.3].
Stage V male (from Antarctic: Ross Ice Shelf): a, habitus (lateral); b, rostrum; c, urosome (lateral); d, idem (dorsal); e-h, P1 to P4; i, P5.

A1 extends well beyond posterior border metasome. Pedigerous segments 1 and 2, also 4 and 5 separate. Posterolateral margins of metasome triangular in lateral view, extending to posterior border of urosome. Urosome 4-segmented, segments 2, 3 and caudal rami with surface spinules: ventrally and laterally on segments 2, ventrally on segment 3 and caudal rami. Mouth parts similar to those of X. harpagatus except that teeth on gnathobase reduced, and large spine on lobe 4 of Mx2 more weakly constructed than large spine on lobe 5.Swimming legs ornamented, differ from those of X. harpagatus chiefly in that P1 endopod narrow, P3 basipod 1 with posterodistal row of spines, and terminal spine on exopod with coarse serrations; P5 uniramous asymmetrical, incipiently 4-segmented on both sides.

NZ: 1

Distribution map of Xanthocalanus sp. by geographical zones
Antarct. (Ross Sea: 82°22.5'S, 168°37.5'W)
N: 1
(452) juv.5 M: 2,11-2
Rem.: After Bradford & Wells (1983, p.4) the ornamentation on the swimming legs looks most like that illustrated for the male X. rotunda (Grice & Hulsemann, 1970).
Last update : 02/02/2015
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2024. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed July 20, 2024]

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Marine Planktonic Copepods

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