Candacia bispinosa ( Claus, 1863 )

Lim, Byung-Jin & Min, Gi-Sik, 2016, First record of Candacia bispinosa (Crustacea: Calanoida: Candaciidae) from Korea, Journal of Species Research 5 (3), pp. 372-374 : 3-5

Candacia bispinosa ( Claus, 1863)

ṣṻṄĝǧƚḇNj ( Fig. 1)

Candace bispinosa Claus, 1863 (p. 191, figs. F, M). Paracandacia bispinosa : Grice, 1963 (p. 173, figs. F, M); Chihara and Murano, 1997 (p. 755, Pl. 79, 80: F, M). Candacia bispinosa : Boxshall and Halsey, 2004 (p. 84).

Material examined. 1 adult male (NIBRIV0000557580), East China Sea ( 31°30′N, 127°04′E), Feb. 2012, coll. S.H. Yoon.

Diagnosis of male. Body ( Fig. 1A) robust (1.88 mm). Rostrum poorly developed, lacking filaments. Cephalosome anteriorly flat and narrow. Cephalosome separated from first pedigerous somite; fourth and fifth pedigerous somites fused; posterior corners of last pedigerous somite with processes. Urosome 5­segmented. Caudal rami symmetrical and with 6 setae. Segments 16 and 18 of right antennule with knob­like protrusion. Leg 5 ( Fig. 1C) asymmetrical. Right leg 3-segmented; first segment elongate and unarmed; second segment with 1 outer spine on middle margin; third segment with 3 small outer spines and 1 long plumose seta. Left leg 4­segmented; first segment unarmed; second segment with subdistal seta; third exopodal segment, swollen, with subdistal seta; fourth segment with hairs along inner margin and 3 terminal setae.

October 2016 LIM AND MIN­FIRST RECORD OF CANDACIA BISPINOSA FROM KOREA 373

B A A, B C C

Female. Not found.

Distribution. East China Sea, Atlantic and Indo-Pacific Oceans.

Remarks. Candacia bispinosa resembles C. worthingtoni ( Grice, 1981) in the absence of chelate form of the male right leg 5 and fourth segment of left leg 5 with 3 terminal setae.

This species differs from C. worthingtoni in the following characters: genital segment of female with spines (versus no spine in C. worthingtoni ); and segment 18 of right antennule swollen in the male (versus not swollen segment).