Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Phaennidae ( Family )
            Xanthocalanus ( Genus )
Xanthocalanus marlyae  Campaner, 1978   (F)
Ref.:
Campaner, 1978 a (p.969, Descr.F ,figs.F); Björnberg & al., 1981 (p.635, figs.F); Campaner, 1985 (p.12, figs.F, Rem.); Bradford & al., 1983 (p.71, Rem.); Bradford-Grieve & al., 1999 (p.881, 929, figs.F)
Species Xanthocalanus marlyae - Plate 1 of morphological figuresissued from : A.F. Campaner in Bolm Inst. oceanogr., S Paulo, 1985, 33 (1). [p.12, Fig.8].
Female (off Rio de Janeiro); a, forehead (lateral); b, idem (ventral). L = lens; P = pignent cup.
Nota: The species was originally described without eyes, but examining the well-preserved specimens, it is possible to state the contrary. The frontal eyes, each one composed of a lens and an internal wine red pigment cup.


Species Xanthocalanus marlyae - Plate 2 of morphological figuresissued from : A. F. Campaner in Ciência e Cultura, 1978, 30 (8). [p.970, Figs.2-7].
Female (from 23°19' S, 41°57' W): 2, habitus (dorsal); 3, same (lateral); 4, forehead ( anterior ventral view); 5, posterolateral thoracic margins and genital segment (ventral); 6, A1; 7, A2.
Scale bars: 0.5 mm (2, 3, 6); 0.2 mm (4, 5, 7).

Nota: Cephalosome and thoracic segment 1 separate.
Rostrum ending in 2 filaments.
Postero-lateral thoracic corners produced, ending in a blunt point and reaching the half of genital segment.
Proportional lengths prosome and urosome 81.5 : 18.5.
A1 24-segmented, overreaching the caudal rami.


Species Xanthocalanus marlyae - Plate 3 of morphological figuresissued from : A. F. Campaner in Ciência e Cultura, 1978, 30 (8). [p.971, Figs.8-13].
Female; 8, Md; 9, Md (cutting edge of the gnathobase); 10, Mx1; 11, Mx2; 12, endopodite of Mx2; 13, Mxp.
Scale bars: 0.1 mm (8, 10, 11); 0.05 (9, 12).

Nota: Mx1: 9 plumose setae on the outer lobe 1, 10 plumose setae on the exopod, 3:3;4 plumose setae on each endopodal segments 1-3, 5 plumose setae on the basis 2; 5 aculeate-straight setae + 8 long setae on the inner lobe 1, 4 long setae on the inner lobe 2 and 4.
Mx2: 5 plumose setae on the inner lobe 1, 3 plumose setae on the inner lobe 3, 1 scythe-shaped + 2 plumose setae on the inner lobe 4, 1 scythe-shaped heavily chitinized seta + 3 long plumose seta on the inner lobe 5, 2 vermiform setae + 6 brush-like setae on the endopod (1 short and broad).
Mxp: 1 brush-like seta + 7 plumose setae on the basis 1, 3 plumose setae on the basis 2, and 6:4:3:5:2 plumose setae on the endopod segments 1-5. Basis 1 and 2 also with groups of setules).


Species Xanthocalanus marlyae - Plate 4 of morphological figuresissued from : A. F. Campaner in Ciência e Cultura, 1978, 30 (8). [p.972, Figs.14-20].
Female: 14-17, P1 to P4, respectively; 18-19, P5 (dorsal and ventral view, rspectively).

Female V copepodite: 20, habitus; 21, endopodite of Mx2.

Scale bars: 0.2 mm (14-17); 0.1 mm (18, 19); 0.5 mm (20); 0.05 mm (21).


Species Xanthocalanus marlyae - Plate 5 of morphological figuresissued from : A. F. Campaner in Ciência e Cultura, 1978, 30 (8). [p.973, Figs.23-27].
Male V copepodite: 22, habitus (lateral); 23, forehead (ventral view); 24, A1; 25, exopodite of A2; 26, endopodite of A2; 27, Md (mandibular palp); 28, Md (gnathobase).
Scale bars: 0.5 mm (22, 24); 0.2 mm (23); 0.1 mm (25-28).


Species Xanthocalanus marlyae - Plate 6 of morphological figuresissued from : A. F. Campaner in Ciência e Cultura, 1978, 30 (8). [p.974, Figs.29-33].
Male V copepodite: 29, Mx1; 30, Mx2 (without the endopodite); 31, endopodite of Mx2; 32, Mxp; 33, P1.
Scale bars: 0.1 mm (29, 30, 33); 0.2 mm (31, 32).


Species Xanthocalanus marlyae - Plate 7 of morphological figuresissued from : A. F. Campaner in Ciência e Cultura, 1978, 30 (8). [p.975, Figs.34-40].
Male V copepodite: 34, P2; 35, P3; 36, P4; 37, P5.

Female IV copepodite: 38, habitus (dorsal); 39, Md; 40, P5.

Scale bars: 0.2 mm (34, 36); 0.1 mm (37, 39, 40); 0.5 mm (38).

Compl. Ref.:
Medellin-Mora & Navas S., 2010 (p.265, Tab. 2); Bonecker & a., 2014 (p.445, Table II: frequency, horizontal & vertical distributions)
NZ: 2

Distribution map of Xanthocalanus marlyae by geographical zones
Loc:
S Brazil (off Rio de Janeiro), Caribbean Colombia (San Andrés y Providencia)
N: 4
Lg.:
(441) F: 3,75-3,3; {F: 3,30-3,75}
Rem.: hyperbenthic (depths 97-115 m).
For Campaner (1978, p.699) the females are most closely related with X. minor, differing from them by: absence of eyes (according to Matthews, 1964), greater body length, postero-lateral thoracic corners not ending sharp-pointed, 1st segment of P5 narrower and the mid-proximal part of the 2nd segment enlarged.
Last update : 17/04/2015
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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 January 28, 2022]

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