Plesionika bifurca Alcock and Anderson, 1894

Li, Xinzheng, 2006, Additional Pandaloid Shrimps From The South China Sea (Crustacea: Decapoda: Caridea), With Description Of One New Species, Raffles Bulletin of Zoology 54 (2), pp. 361-372 : 368

Plesionika bifurca Alcock and Anderson, 1894

( Fig. 7b )

Pandalus bifurca Alcock & Andersen, 1894: 155 [type locality: Arabian Sea].

Plesionika bifurca . – De Man, 1920: 105, 136, Pl. 12 fig. 31-31b; Chace, 1985: 56, Fig. 24; Li & Komai, 2003: 260.

Material examined. – 1 male, CN SSB1-1 C, Nansha Islands , 10º20.40'N 109º41.27'E, 332-410 m, coll. Zhican Tang & Baolin Zhang, 12 Sep.1994 .

Distribution. – Eastern Africa to Indonesia, Philippines, South China Sea, and southern Japan; at depths of 220-1412 m.

Remarks. – The only specimen is damaged with most of telson lost. However, the characteristic up-curved and short rostrum, armature on the rostrum, as well as other characters such as the orbital margin being strongly convex, fourth and fifth abdominal pleura bearing posteroventral tooth, eye without ocellus, third pereiopod with combined lengths of three distal segments exceeding carapace length and the dactylus almost as long as half propodus, agree well with the definition of P. bifurca . Nevertheless, the present specimen is slightly different from the diagnosis given by Chace (1985) in that the stylocerite is just reaching the dorsal arc at distal margin of the first antennular segment and the left second pereiopod with only 14 carpal articles (the right one lost). Not previously reported from the Nansha Islands.

Figures

Fig.7. Heterocarpus gibbossus Bate, 1888, ovigerous female (cl 24.8 mm), Philippines, Sulu Sea, Panglao 2005 Expedition, station CP2372, 8º38.7'N 123º16.0'E, 231-255 m depth, 27 May.2005: a, third maxilliped; b, Plesionika bifurca Alcock and Anderson, 1894, male, South China Sea, anterior carapace and appendages. Scale bar = 2 mm.