Parastylodactylus bimaxillaris ( Bate, 1888 )

Cleva, Régis, 2004, Stylodactylidae And Bathypalaemonellidae From Taiwan (Crustacea: Decapoda: Caridea), Raffles Bulletin of Zoology 52 (2), pp. 497-511 : 505-506

Parastylodactylus bimaxillaris ( Bate, 1888)

Stylodactylus bimaxillaris Bate 1888: 855 , Pl.138, fig. 3; Calman, 1939: 188; Hayashi & Miyake, 1968: 599, Fig. 5; Miyake, 1982: 25 (not Pl.9, fig. 4 = Stylodactylus multidentatus Kubo, 1942 ).

Parastylodactylus bimaxillaris - Chace, 1983: 8, Fig. 4 ; Chan & Yu, 1985: 289, Pl. I A-D (color photographs); Cleva, 1990: 115, Figs. 11a, 12a; Hayashi, 1991b: 121; Cleva, 1994: 62; 1997: 397, Fig. 4F (color photograph).

Not Stylodactylus bimaxillaris - Calman, 1925: 16; Barnard, 1950: 652, Figs. 122 f-h (= Stylodactylus stebbingi Hayashi & Miyake, 1968 ).

Not Stylodactylus bimaxillaris - Miyake, 1982, Pl. 9, fig. 4 (= Stylodactylus multidentatus Kubo, 1942 ).

Material examined. – 2 females (1 ov.) 6 & 6.5 mm ( MNHN.Na- 14178), NE Taiwan, Ta-Shi fishing port, commercial trawler, 200- 400 m, coll. A. Anker, Mar.2000 .

“ TAIWAN 2000”, R. V. “FISHERY RESEARCHER1”, coll. P. Bouchet, B. Richer de Forges-IRD & T.Y. Chan: 2 females (1 ov.) 6 & 6.5 mm ( MNHN.Na-14160), st. CP 27, 22 13.3’N- 120 23.45’E, 329-377 m, 30 Jul.2000; 3 ov. females 4 to 5 mm ( MNHN.Na- 14161), st. CP 58, 24 35.1’N- 122 05.8’E, 221-254 m, 04 Aug.2000. “ TAIWAN 2001”, NE coast of Taiwan, commercial trawler, coll. P. Bouchet, B. Richer de Forges-IRD & T. Y. Chan: 1 male 5 mm, 3 ov. females 5.5 to 6 mm ( ZRC), st. CC 66 , 24 53.6’N- 122 03.15’E, 546 m, 05 May.2001; 1 ov. female 5 mm ( MNHN.Na-14163), st. CP 67, 24 51.33’N- 121 59.03’E, 259 m, 06 May.2001; 4 ov. females 5.5 to 6.5 mm ( MNHN.Na-14164), st. CP 73, 24 52.86’ N-122 01.98’E, 220-230 m, 07 May.2001; 1 ov. female 5 mm ( ZRC), st. CP 74, 24 50.84’N- 121 59.28’E, 220 m, 07 May.2001; 2 ov. females 5 & 6 mm ( MNHN.Na-14166), st. CP 75, 24 56.72’ N-122 01.81’E, 139 m, 07 May.2001; 3 ov. females 5 to 6 mm ( ZRC), st. CP.76, 24 56.54’N- 122 01.51’E, 115-170 m, 07 May.2001; 6 ov. females 5 to 6 mm ( MNHN.Na-14168), st. CP81, 24 50.48’ N-121 59.95’E, 205 m, 08 May.2001; 1 ov. female 5.5 mm ( MNHN.Na-14169), st. CP 93, 24 50.13’N- 121 55.7’E, 66-110 m, 10 May.2001; 2 males 5 mm, 13 ov. females 5 to 6 mm ( MNHN.Na- 14159), st. CP 95, 24 55.8’N- 122 05.73’E, 269-360 m, 18 May.2001; 1 male 6 mm, 2 ov. females 5 & 5.5 mm ( ZRC), st. CP108, 24 48.23’N- 122 07.74’E, 295-337 m, 20 May.2001; 1 ov. female 5.5 mm ( MNHN.Na-14171), st. CP 109, 24 48.29’N-122 83.98’E, 246-256 m, 20 May.2001; 1 ov. female 4 mm ( MNHN.Na-14172), st. CP 114, 24 51.03’N- 121 58.3’E, 128-250 m, 21 May.2001; 1 male 5.5 mm, 3 ov. females 4.5 to 6 mm ( ZRC), st. CP 116, 24 55.4’N- 122 00.39’E, 100 m, 21 May.2001; 1 ov. female 8 mm ( MNHN.Na-14174) ,

“ TAIWAN 2002”, Tong-Kong Fishing Boat, st. CP160, 22 12.98’ N-120 28.78’E, 300 m, 24 May.2002; 1 ov. female 5 mm ( NTOU), N.E. Taiwan, I-Lan county, Tai-Shi fishing port, commerciel trawler, 17 Apr. 2003; 4 females (3 ov.) 3 to 5 mm ( NTOU), « TAIWAN 2003», st. CP 216, 24 34.71’N- 122 04.02’E, 209-280 m, 27 Aug.2003 .

Comparative material. – Madagascar, “Vauban”, coll. A. Crosnier: 1 male 6.5 mm (MNHN-Na.5266), st. 4, 12 52.4’ S-48 10.4’E, 400-410 m, 04 Mar.1971 ; 1 ov. female 7.5 mm (MNHN-Na.5275), st. 7, 12 42.4’S- 48 14.1’E, 380- 375 m, 05 Mar.1971; 2 females (1 ov.) 5.5 & 7.5 mm (MNHNNa.5274), st. 31, 12 34’S- 48 15’E, 395 m, 13 Sep.1972; 1 ov. female 5.5 mm (MNHN-Na.5276), st. 44, 15 25.7’ S-46 01.0’E, 200-210 m, 07 Nov.1972; 1 ov. female 7 mm (MNHN-Na.5277), st. 122, 12 43’S- 48 12’E, 500 m, 11 Oct.1974.

Philippines: 1 ov. female 5.5 mm (MNHN-Na.3630), MUSORSTOM 1, st. 5, 14 01.5’N- 120 23.5’E, 215- 200 m, 19 Mar.1976; 1 female 5.5 mm (MNHN-Na.3629), MUSORSTOM 1, st. 42, 13 55.1’N- 120 28.6’E, 379-407 m, 24 Mar.1976; 1 ov. female 4 mm (MNHN-Na.4234), MUSORSTOM 2, st. 35, 13 27.9’N- 121 11.6’E, 160-198 m, 24 Nov.1980; 1 ov. female 5.5 mm (MNHN-Na.4235), MUSORSTOM 2, st. 49, 13 38.4’N- 121 44.1’E, 425- 416 m, 26 Nov.1980; 3 ov. females 6.5 to 7 mm (MNHN-Na.4236), MUSORSTOM 2, st. 83, 13 55.2’N- 121 30.5’E, 320- 318 m, 02 Dec.1980.

Indonesia, KARUBAR: 1 male 6 mm, 1 ov. female 7 mm (MNHN-Na.12144), st. CP 36, 06 05’S- 132 44’E, 268- 210 m, 27 Oct.1991 ; 1 ov. female 8.5 mm (MNHN-Na.12145), st. CC 41 , 07 47’S- 132 39’E, 401- 393 m, 28 Oct.1991 ; 1 ov. female 6.5 mm (MNHN-Na.12146), st. CP 69, 08 45’ S-131 51’E, 356-367 m, 02 Nov.1991; 1 female 6 mm (MNHNNa.12147), st. CP 76, 08 49’S- 131 35’E, 400 m, 03 Nov.1991; 1 ov. female 6.5 mm (MNHN-Na.12148), st. CP 83, 09 24’S- 130 59’E, 285-298 m, 04 Nov.1991; 1 female 4.5 mm (MNHN-Na.12149), st. CP 86, 09 23’S- 131 14’E, 226- 222 m, 04 Nov.1991.

New Caledonia: 1 male 4 mm (MNHN-Na.10776), BIOCAL, st. 42, 23 45’S- 167 12’E, 380 m, 30 Aug.1985 ; 1 male 5.5 mm, 1 female 5 mm (MNHN-Na.10777), BIOCAL, st. 45, 22 47’S- 167 14’E, 430-465 m, 30 Aug.1985; 2 ov. females 5.5 & 6 mm (MNHN-Na.10772), MUSORSTOM 4, st. 171, 18 57.8’S- 163 14.0’E, 425 m, 17 Sep.1985; 1 ov. female 6 mm (MNHN-Na.10865), MUSORSTOM 4, st. 172, 19 01.2’S- 163 16.0’E, 275-330 m, 17 Sep.1985; 2 ov. females 5 & 5.5 mm (MNHN-Na.10774), MUSORSTOM 4, st. 173, 19 02.5’S- 163 18.8’E, 250-290 m, 17 Sep.1985; 1 male 4.5 mm (MNHN-Na.10775), MUSORSTOM 4, st. 180, 18 56.8’S- 163 17.7’E, 440 m, 18 Sep.1985; 1 ov. female 6.5 mm (MNHN-Na.10773), MUSORSTOM 4, st. 201, 18 55.8’S- 163 13.8’E, 490 m, 20 Sep.1985; 1 ov. female 7 mm (MNHN-Na.13219), BATHUS 4, st. CP 910, 18 59’ S-163 08’E, 560-608 m, 05 Aug.1994.

Vanuatu: 1 male 4 mm (MNHN-Na.13220), 1 ov. female 5 mm (MNHN-Na.14473), MUSORSTOM 8, st. CP 1091, 15 10 ’S- 167 13’E, 344-350 m, 06 Oct.1994 .

Fidji Islands, “Alis”, MUSORSTOM 10, coll. Bouchet & Richer de Forges : 1 ov. female 4.5 mm (MNHN-Na.15013), st. CP 1320, 17 16.8’S- 177 53.6’E, 290-300 m, 06 Aug.1998; 1 female 4 mm (MNHN-Na.15014), st. CP 1325, 17 16.4’ S-177 49.8’E, 282-322 m, 07 Aug.1998; 1 ov. female 5.5 mm (MNHN-Na.15015), st. CP 1327, 17 13.3’S- 177 51.6’E, 370-389 m, 07 Aug.1998.

Solomon Islands, “Alis”, SALOMON 1, coll. Bouchet H & al.: 1 ov. female 7.5 mm (MNHN-Na.15016), 1 ov. female 5 mm (MNHN-Na.15017), st. CP 1747, 9 21.8’S- 159 58.7’E, 364-402 m, 25 Sep.2001 ; 1 ov. female 8 mm (MNHNNa.15018), st. CP 1761, 8 46.5’S- 160 01.6’E, 191-290 m, 27 Sep.2001; 1 ov. female 5 mm (MNHN-Na.15019), 1 ov. female 6 mm (MNHN-Na.15020), st. CP 1804, 9 32.0’ S-160 37.4’E, 309-328 m, 02 Oct.2001.

Diagnosis. – Rostrum 1.4 to 1.8 times longer than the carapace, with 16 to 21 dorsal spines situated on the rostrum proper, plus four to seven spines (usually six) situated on the carapace (behind orbit level), reaching to its middle, and four to seven ventral spines.

Remarks. – Examination of specimens in the MNHN collected from different localities ( Philippines, Indonesia, Madagascar, New Caledonia, Vanuatu, Fiji, Solomon) shows that the pleura of the fifth abdominal somite are typically pointed, produced into a spine, at the postero-ventral angle, except for occasional specimens in which one or both of the fifth abdominal pleura do not end in a spine: this is the case for example in some Indonesian specimens. It should be noted that this unfrequent characteristic is the commonest in the Taiwanese specimens: it has been found in 45 out of the 58 specimens examined; only three specimens have the fifth abdominal pleura ending in a spine on each side, and the remaining ten showed the spine on one side only.

Coloration. – Well described by Chan & Yu (1985: 290, Pl. I A-D), who indicated three different color patterns.

Distribution. – Widespread in many Indo-Pacific areas: South Africa, Mozambique, Madagascar, Gulf of Aden, Japan, Korea Strait, East China Sea, Taiwan, Philippines, Admiralty Islands (off New Guinea), Australia, New Caledonia and Vanuatu. It has recently been collected from the Fiji Islands (French cruise MUSORSTOM 10), between 282 and 389 m and from the Solomon Islands (BORDAU 2) between 191 and 402 m. The Taiwanese specimens studied here were collected between 66 and 546 m, extending the known bathymetric range, which was previously 106 to 608 m ( Cleva, 1997: 397).

Figures

Fig. 4. Bathypalaemonetes chani, new species, female ov. 15 mm, Holotype, TAIWAN 2001, st. CD 132. Scale bar = 5 mm.