Paranchistus spondylis Suzuki, 1971

Li, Xinzheng, Bruce, Alexander J. & Manning *, Raymond B., 2004, Some Palaemonid Shrimps (Crustacea: Decapoda) From Northern South China Sea, With Descripitions Of Two New Species, Raffles Bulletin of Zoology 52 (2), pp. 513-553 : 538

Paranchistus spondylis Suzuki, 1971

( Fig. 24 )

Paranchistus spondylis Suzuki, 1971: 15 , Figs. 8 , 9 ; Müller, 1993: 52; Li, 2000: 113, Fig. 124; Bruce, 2003: 223.

Material examined. – 2 juv., CN X295 B-68, [20ºN, 108º30’E], 64m, soft sandy mud, AT, within Vulsella vulsella (L.), coll. De, 18 Oct.1962 .

Diagnosis. – Rostrum straight, with margins subparallel, with 4 dorsal teeth and 1 subapical ventral tooth. Carapace with lower orbital angle not developed. First pereiopods with cutting edges of fingers entire, not pectinate. Second pereiopods with dactyl slightly over-reaching fixed finger, if at all. Third to fifth pereiopods with dactyl biunguiculate, not flattened on extensor margin, this margin covered with fine tubercles.

Distribution. – Previously only recorded from the type locality, Sagami Wan, Japan. Recorded here for the first time from South China Sea.

Remarks. – The construction of the tail-fan of the present specimens is different from Suzuki’s (1971) description: in the present specimens, the telson is distinctly shorter than the uropods; the anterior pair of dorsal telson spines is clearly situated behind the middle of the telson length, the lateral posterior marginal telson spines are subdorsal, placed distinctly anterior to the intermediate and submedian pairs. The host of present specimens, Vulsella vulsella (L.), and depth of 64 m, are also different from the types, Spondylus barbatus and littoral. As the present specimens are juveniles, it is unlikely that they are another species, and their other characters agree well with Suzuki’s (1971) description.

Figures

Fig. 24. Paranchistus spondylis Suzuki, 1971. a, carapace and rostrum, lateral view; b, 1st pereiopod; c, 2nd pereiopod; d, same, fingers; e, 3rd pereiopod; f, 5th pereiopod; g, telson and uropod, dorsal view.

Fig.8. Macrobrachium mammillodactylus (Thallwitz, 1892). a, carapace and anterior appendages, lateral view; b, mandible; c, 2nd pereiopod; d, same, chela and carpus; e, telson and uropod.

Fig. 9. Palaemon debilis Dana, 1852. a, carapace and rostrum, lateral view; b, antennule; c, mandible; d, 1st pleopod, male.