Kemponia cf. andamanensis ( Kemp, 1922 )

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 : 529

Kemponia cf. andamanensis ( Kemp, 1922)

( Fig. 16 )

Periclimenes (Ancylocaris) andamanensis Kemp, 1922: 204 , Figs. 54-57.

Periclimenes andamanensis - Bruce, 1977: 269; 2003: 229; Chace & Bruce, 1993: 103; Müller, 1993: 70; Li, 1996: 229, Fig. 7 ; 1997: 238; 2000: 156, Fig. 192; 2001: 81; 2004: 68.

Kemponia andamanensis - Bruce, 2004: 12 .

Material examined. – 3 males 6 females (3ovig), CN N219 B-175C, [18º15’N, 108º30’E], muddy sand and shell pieces, 54m, AT, coll. J. Y. Liu, 16 May.1960 ; 3 males, 7 females, 1 ovig female, off Zhanjiang , Guangdong, coll. J. Y. Liu,? Sep.1978 ; 5 males, 2 females, 20 juv., Qinglan Harbour, Hainan Is. , intertidal, mud, 27 Apr.1980 ; 2 males, 4 females ( IOCAS) , 1 male, 1 female ( ZRC) , 1 male, 1 female (SI), CN 90 C-349C, Meixia, Lingao, Hainan Is. , intertidal, coll. J. Y. Liu, 2 Dec.1990 ; 1 male, CN 19-20 , [18ºN, 108º30’E], 79m, muddy sand, BT, coll. Z. Fan, 28 Jan.1959 ; 1 ovig female, CN X224 B-59B, [18º30’N, 108º30’E], 26m, sand, AT, coll. Sun, 16 Aug.1962 ; 4 males, 3 females, CN 56 K-876, Suixi, Caotan , coll. Baoling Wu, 31 Mar.1956 .

Diagnosis. – Rostrum reaching level of distal end of scaphocerite or beyond, directed slightly anterodorsad in anterior half, with 1-2 + 6-8/2-4 teeth. Carapace with supraorbital spine. Scaphocerite with distolateral tooth far over-reaching distal margin of lamella. Fourth thoracic sternite with slender median process. Second pereiopods with distoventral tooth on merus; carpus armed with 1 distal tooth. Ambulatory pereiopods with dactyl simple; fifth pereiopods reaching as far as end of scaphocerite or beyond.

Distribution. – Madagascar, Andaman Islands, South China Sea, Ryukyu Islands, Indonesia, Australia.

Remarks. – See “Remarks” under Kemponia grandis ( Stimpson, 1860) . Our samples agree fully with the original description, with the exception of the ambulatory pereiopods. The dactyls of the third pereiopods of the types are 0.28 to 0.37 of the length of the propodi ( Kemp, 1922), but those of our samples are about 0.5 as long as the prodopi. The dactyls are much longer than those of the types. The species is close to Kemponia longirostris ( Borradaile, 1915) , also in the “ Periclimenes grandis species group”, with long and slender ambulatory pereiopods. As re-described by Holthuis (1958), the dactyl of the third pereiopod of K. longirostris is about 0.29 of the length of the propodus and the fifth pereiopods reaching to about the end of scaphocerite. But K. andamanensis differs from K. longirostris in having the carpus of the second pereiopod always with an acute distal spine on the inner side, at least in adults. Kemponia longirostris lacks this acute spine in this position, at most having two blunt distal lobes on the carpus of the second pereiopods.

Figures

Fig. 16. Kemponia cf. andamanensis (Kemp, 1922). a, carapace and rostrum, lateral view; b, left 2nd pereiopod, outer view; c, same, carpopropodal articulation, inner view; d, left 3rd pereiopod, outer view; e, same, propodus and dactyl.

Fig. 7. Leptocarpus potamiscus (Kemp, 1917). a, carapace and rostrum; b, mandible, lateral view; c, 2nd pereiopod.