Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Phaennidae ( Family )
            Xanthocalanus ( Genus )
Xanthocalanus oculatus  (Tanaka, 1960)   (M)
Syn.: Amallophora oculata Tanaka, 1960 a (p.111, Descr.M, figs.M)
Bradford & al., 1983 (p.71); Tanaka & Omori, 1992 (p.270, Rem.)
Species Xanthocalanus oculatus - Plate 1 of morphological figuresissued from : O. Tanaka in Publ. Sero Mar. Biol. Lab., 1960, VIII (1). [p.111, Fig.93]. As Amallophora oculata.
Male (from Sagami Bay, Japan): a, habitus (dorsal); b, forehead (lateral); c, last thoracic segment and 1st urosomal segment (lateral left side); d, rostrum (anterior aspect); e, A2; f, Md; g, Mx2; h, Mxp; i, P1; j, endopod of P2; k, terminal spine of exopod of P2; l, endopod of P3; m, P5.

Nota: Head and 1st thoracic segment separate, 4th and 5th fused.
The frontal margin of the head hollowed near the base of the rostrum (viewed from the lateral). A single ventral eye (deep carmin-red) under the projection of the forehead.
Rostrum with 2 strong spines attached to the basal portion.
The abdominal segments and caudal rami in the proportional lengths 12 : 30 : 26 : 16 : 6 : 10 = 100.
The caudal rami slightly obique.
A2 exopodite 1.5 times as long as endopodite; the 1st basal segment with a tuft hairs on the posterior surface.
Mx2 with a large button-shaped sensory appendage and 5 small brush-shaped sensory setae on endopod; the setae on the apical lobes long and flexible.
Right P5: terminal segment very slender, 3rd and 4th have each an outer marginal spine, 2nd has a small rudimentary endopod. Left P5: terminal segment small, inner margin serrated; 4th with slender spines on the distal margin; 3rd with a small outer-edge spine; 2nd with a rudimentary endopod.

Species Xanthocalanus oculatus - Plate 2 of morphological figuresissued from : O. Tanaka in Publ. Sero Mar. Biol. Lab., 1960, VIII (1). [p.111, Fig.93]. As Amallophora oculata.
Male: Proportional lengths of segments of A1.

Nota: A1 19-segmented, reaches the distal end of the abdomen. Segments 8 to 14 fused.

NZ: 1

Distribution map of Xanthocalanus oculatus by geographical zones
Japan (Sagami)
N: 1
(4) M: 3,4; {M: 3,40}
Rem.: Sampling between 0-1000 m.
Last update : 02/02/2015
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 Any use of this site for a publication will be mentioned with the following reference :

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 21, 2024]

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Marine Planktonic Copepods

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