New version of the site! The interface has just been modernized — tell us what you think by email or rate it : ★★★★★ ★★★★★
Marine Planktonic Copepods
Xanthocalanus dilatus  Grice, 1962   (F,M)
Taxonomy
Order Calanoida
Superfamily Clausocalanoidea
Family Phaennidae

References

Grice, 1962 (p.203, Descr.F, figs.F); Guangshan & Honglin, 1984 (p.135, Descr.M, figs.M)

Figures

Plate 1 issued from : Guangshan & Honglin, 1984.
Female: 15, 16, habitus (dorsal, lateral); 17, P5; 20, B1 and B2 of P3.
Male: 18, 19, habitus (dorsal, lateral); 21, P5 (left); 22, P5 (right).
Plate 2 issued from : G.D. Grice in Fish. Bull. Fish and Wildl. Ser., 1962, 61. [p.204, Pl.15, Figs.2-11].
Female (from 00°16'N, 140°12'W): 2-3, habitus (dorsal and lateral, respectively); 4, rostrum; 5, Mx1; 6, terminal part of Mx2; 7, P1; 8, P2; 9, P3; 10, P4 (distal two segments of exopod missing); 11, P5.
Figs.2-6 and 11 of holotype; figs.7-10 of paratype.
Head and 1st thoracic segment separate, 4th and 5th separate.
Posterior lateral margins of the 1st thoracic segment distended and there is a distinct dilatation on the dorsal surface of the head.
Rostrum straight and club-like;
2nd segment of endopod of A2 with 14 setae on the distal margin (8 on the inner lobe and 6 on the outer lobe); exopod with 6 setae but some may be missing from the various segments.
Md with 3 setae on the basipod; 11 setae on the endopod and 6 on the exopod.
Mx1: 9 setae on the external lobe, 7 on the exopod, 9 on the endopod, 5 on the 2nd basal segment, 2 on the 2nd internal lobe and 3 on the 3rd internal lobe.
Terminal part of Mx2 with 6 sensory organs and 1 worm-like appendage.

Complementary References

Campaner, 1978 a (p.968); Bradford & al., 1983 (p.71); Shih & Young, 1995 (p.71); Williamson & McGowan, 2010 (p.273, Table III, Pacific central gyres: N & S)

Distribution

NZ: 2

Distribution map of Xanthocalanus dilatus by geographical zones


Localisations

Pacif. (N equatorial), Pacif. (W equatorial), Pacific (central gyres: N & S), China Seas (South China Sea)

Quotations

N: 4

Dimensions (mm)

(101) F: 1,6; 1,56; (952) F: 1,5; M:1,4; {F: 1,50-1,60; M: 1,40}

Remarks

epi-mesopelagic.
Last update : 02/02/2015

Contributor Remarks

 to add your remark