Stylodactylus multidentatus multidentatus Kubo, 1942

Cleva, Régis, 2004, Stylodactylidae And Bathypalaemonellidae From Taiwan (Crustacea: Decapoda: Caridea), Raffles Bulletin of Zoology 52 (2), pp. 497-511 : 500-502

Stylodactylus multidentatus multidentatus Kubo, 1942

Stylodactylus multidentatus Kubo, 1942: 34 , Figs. 4 , 5; Hayashi & Miyake, 1968: 586, Fig. 1 ; Miyake, 1982: 26, Pl.9, fig. 5 (color photograph); Chace, 1983: 11 (key), 20, Figs. 8a-o; Chan & Yu, 1985: 290, Pl.I E, F (color photographs); Hayashi in Baba et al., 1986: 93, Fig. 53 (color photograph); Kensley et al., 1987: 293; Hayashi, 1991a: 43.

Stylodactylus multidentatus multidentatus - Cleva, 1990: 100, Figs. 7, 8h-m;1994: 59;1997: 391.

Stylodactylus discissipes - Balss 1933: 84 (not Bate, 1888).

Stylodactylus bimaxillaris - Miyake 1982: Pl. 9, fig. 4 (not Bate, 1888).

Stylodactylus brevidactylus - Cleva 1990: 106, Figs. 8a-g.

Material examined. – 1 ov. female 18 mm (MNHN-Na.15001), South Taiwan, Tong Kung, fishing port, 20 Sep.1990, coll. T.Y. Chan ; 2 females 20 and 21 mm ( MNHN.Na-14177), NE Taiwan, Tai Shi fishing port, commercial trawler, 27 May.1997 ; 1 ov. female 17 mm (MNHN-Na.15002), NE Taiwan, Tai-Shi fishing port, Feb. 2003 , coll. T. Y. Chan; 1 ov. female 19 mm ( ZRC), NE Taiwan, Tai-Shi fishing port, about 300 m, coll. T.Y. Chan 26 Jun.2003 ; 1 male 14.5 mm ( ZRC), “ TAIWAN 2000”, R. V. “FISHERY RESEARCHER 1”, st. CP 27, 22 13.3’N- 120 23.4’E, 329-377 m, 30 Jul.2000 ; 1 female 17 mm ( ZRC). “ TAIWAN 2001”, commercial trawler, st. CP 91, 24 50.6’N- 122 1.39’E, 400 m, 10 May.2001 ; 1 male 15 mm, 1 ov. female 16 mm ( ZRC), “ TAIWAN 2002”, commercial trawler, st. CP 159, 22 14.61’N- 120 59.94 E, 208 m, 24 May.2002 ; 1 ov. female 20 mm ( MNHN.Na-14197), “ TAIWAN 2002”, st. CP 161, 22 09.63’N- 120 35.48’E, 302 m, 25 May.2002 ; 2 males 9.5 & 11 mm ( MNHN.Na-14198), “ TAIWAN 2002”, st. CP162, 22 09.64’N- 120 37.86’E, 190-200 m, 25 May.2002 ; 1 ov. female 17.5 mm ( MNHN. Na-14199), “ TAIWAN 2002”, st. CP 163, 22 13.35’N- 120 36.03’E, 151 m, 25 May.2002 ; 2 males 13.5 & 14 mm ( ZRC), “ TAIWAN 2002”, st. CC 175 , 22 14.59’ N-120 26.37’E, 210 m, 28 May.2002 ; 9 males 8 to 15.5 mm, 8 females 7.5 to 14.5 mm ( NTOU), “ TAIWAN 2003”, st. CP 212, 24 34.60’ N-122 5.84’E, 223-260 m, 26 Aug.2003 ; 3 females (1 ov.) 9 to 16.5 mm ( NTOU), “ TAIWAN 2003”, st. CP 216, 24 34.71’ N-122 04.02’E, 209-280 m, 27 Aug.2003 .

Comparative material. – Fidji Islands , “Alis”, MUSORSTOM 10, coll. Bouchet & Richer de Forges:2 ov. females 13 et 15.5 mm (MNHN-Na.14269), st. CP 1327, 17 13’S- 177 51’E, 370-389 m, 07 Aug.1998 ; 1 male 12.5 mm (MNHN-Na.14270), st. CP 1349, 17 31’S- 178 38’E, 244-252 m, 11 Aug.1998; 1 female 7.0 mm (MNHNNa.14273), st. CP 1360, 17 59’S- 178 48’E, 402-444 m, 13 Aug.1998; 1 male 12.5 mm (MNHN-Na.14272), st. CP 1389, 18 18’S- 178 04’E, 241-417 m, 19 Aug.1998. Fidji Islands , “Alis”, BORDAU 1 , coll. Bouchet et al.: 1 female 17 mm (MNHN-Na.14276), st. CP 1429, 17 17’S- 179 01’W, 400- 410 m, 01 Mar.1999 ; 1 male 15 mm (MNHN-Na.14275), st. CP 1434, 17 11 ’S- 178 41’W, 400-401 m, 02 Mar.1999; 1 male 15.5 mm, 1 ov. female 15.5 mm (MNHN-Na.14980), st. CP 1444, 17 11 ’S- 178 41’W, 398-409 m, 03 Mar.1999; 1 male 14.5 mm, 1 ov. female 14 mm (MNHN-Na.14268), st. CP 1468, 18 16’S- 178 41’W, 478-500 m, 07 Mar.1999; 2 males 15 mm, 1 female 14.5 mm (MNHN-Na.14979), st. DW 1493, 18 43’S- 178 24’W, 429-440 m, 11 Mar.1999; 1 male 14 mm (MNHN-Na.14271), st. CP 1504, 18 13’ S-178 34’W, 427-440 m, 13 Mar.1999; 2 males 10 & 14.5 mm, 3 females (1 ov.) 14 to 15 mm (MNHN-Na.14981), st. CP 1505, 18 12 ’S- 178 37’W, 420-450 m, 13 Mar.1999. Tonga Islands , “Alis”, BORDAU 2 , coll. Bouchet et al.; 3 males 7.5 to 13 mm, 2 ov. females 13.5 mm (MNHN-Na.14990), 1 male 13.5 mm (MNHN-Na.14992), st. CP 1511, 21 08 ’ S-175 22’W, 384-402 m, 31 May.2000 ; 3 males 11.5 to 13.5 mm, 2 females (1 ov.) 11.5 & 12.5 mm (MNHN-Na. 14987), st. CP 1560, 19 52’S- 174 39’W, 365-372 m, 08 Jun.2000; 3 ov. females 11.5 to 14 mm (MNHN-Na.14983), st. CP 1561, 19 52’S- 174 40’W, 383-393 m, 08 Jun.2000; 5 males 13 to 14.5 mm, 5 females (4 ov.) 11 to 14.5 mm (MNHNNa.14986), 1 ov. female 11.5 mm (MNHN-Na.14994), st. CP 1562, 19 52’S- 174 42’W, 417-424 m, 08 Jun.2000; 2 males 13.5 & 15 mm, 1 ov. female 12 mm (MNHNNa.14984), st. CH 1563, 19 52’S- 174 39’W, 362-388 m, 08 Jun.2000 ; 2 males 13.5 mm, 6 females (5 ov.) 12 to 14 mm (MNHN-Na.14988), st. CH 1564, 19 52’S- 174 39’W, 371- 387 m, 08 Jun.2000 ; 6 males 7.5 to 13.5 mm, 4 females (1 ov., 4 juv.) 6.5 to 13 mm (MNHN-Na.14989), 1 male 13.5 mm, 1 ov. female 13 mm (MNHN-Na.14985), st. CP 1572, 19 42’S- 174 31’W, 391-402 m, 11 Jun.2000; 1 female (damaged) (MNHN-Na.14995), st. CP 1575, 19 42’ S-174 21’W, 232-295 m, 11 Jun.2000; 1 male 8.5 mm (MNHNNa.14996), st. CP 1578, 19 42’S- 174 25’W, 329-331 m, 11 Jun.2000; 3 males 13 mm (MNHN-Na.14991), st. CP 1592, 19 08 ’S- 174 17’W, 391-426 m, 14 Jun.2000; 1 female 12 mm (MNHN-Na.14993), st. CH 1596, 19 06 ’S- 174 18’W, 371-437 m, 14 Jun.2000 ; 3 males 10.5 to 12 mm, 4 females (2 ov., 1 juv.) 5.5 to 14.5 mm (MNHN-Na.14982), st. CP 1641, 21 09 ’S- 175 22’W, 395 m, 21 Jun.2000.

Solomon Islands, “Alis”, SALOMON 1, coll. Bouchet et al.: 1 male 17 mm (MNHN-Na.14997), st. CP 1802, 9 31.1’ S-160 35.0’E, 245-269 m, 02 Oct.2001; 2 males 11.5 & 15.5 mm (MNHN-Na.14998), st. CP 1851, 10 27.6’S- 162 00’E, 297-350 m, 06 Oct.2001; 1 male 18.5 mm (MNHNNa.14999), 1 male 17 mm (MNHN-Na.15000) st. CP 1860, 9 22 ’S- 160 31’E, 620m, 07 Oct.2001.

Remarks. – On the Taiwanese specimens, the rostrum/ carapace ratio varies from 0.75 to 1.2. The rostrum bears from 34 to 52 dorsal spines (8 to 12 being on the carapace proper) and from 12 to 22 ventral spines. The rostral formula is not clearly related with the specimens size nor with the rostrum/ carapace ratio.

Coloration. – Typically reddish-pink with red stripes and some white stripes (Chan & Yu, 1985: Pl. 1E, F).

Distribution. – Widespread in the Indo-Pacific: Japan (225- 300 m); Philippines (152-366 m); Indonesia (146-314 m); Australia (237-412 m); New Caledonia (205-580 m); Vanuatu (314-830m?). It has recently been collected from the Fiji Islands, between 241 and 500 m, by the French Cruises MUSORSTOM 10 and BORDAU 1, from the Tonga Islands (BORDAU 2 cruise) between 232 and 437 m and from the Solomon Islands between 245 and 620 m, the last number being exceptional. This Taiwanese material extends the bathymetric distribution of the species in Taiwan to 150-400 m; Chan & Yu (1985: 291) stated: “rather common in Taiwan waters and usually occurs as by-caught among coastal shrimp fisheries at about 150-250 m depth off north-east and southern Taiwan ”.

Stylodactylus libratus Chace, 1983

( Figs. 2a , 6b )

Stylodactylus libratus Chace, 1983: 12 , Fig. 5; Kensley et al., 1987: 292; Cleva, 1990: 108, Figs. 9b, 18a, b (color photographs); Hayashi, 1991a: 40; Cleva, 1997: 393, Figs. 1A, C, E ; 2A, C .

Material examined. – 1 male 11 mm ( NTOU), NE Taiwan, SuAou fishing Port, commercial trawler, depth unknown, 17 Jun.1993 .

Comparative material. – Marquesas Islands, “Alis”, MUSORSTOM 9, coll. Bouchet et al.: 1 male 9.5 mm (MNHN-Na.13458), st. CP 1268, 7 56’S- 140 43’W, 285-320 m, 04 Sep.1997; 2 males 11 mm, 1 ov. female 11 mm (MNHN-Na.13457, st. CP 1282, 7 52’S- 140 31’W, 416-460 m, 07 Sep.1997. Solomon Islands, “Alis”, SALOMON 1, coll. Bouchet et al.: 1 ov. female 12 mm (MNHN-Na.15008), st. DW 1817, 9 48.2’S- 160 54.3’E, 233-269 m, 03 Oct.2001 ; 1 male 11.5 mm (MNHN-Na.15009), st. DW 1852, 9 46.6’ S-160 53’E, 236-250 m, 07 Oct.2001; 1 female 8.5 mm (MNHN-Na.15010), st. DW 1854, 9 46.4’S- 160 52.9’E, 229- 260 m, 07 Oct.2001.

Remarks. – This single specimen has been identified as Stylodactylus libratus . The nearly straight rostrum is 1.35 times longer than the carapace; it bears 39 dorsal spines (six are situated on the carapace proper, behind the orbital level), and 16 ventral spines ( Fig. 2a ).

In the holotype, a male from Indonesia (CL = 13.5 mm), rostrum only slightly longer than the carapace, bearing 30 dorsal and eight ventral spines. In another Indonesian specimen ( Cleva, 1997: 393), rostrum/carapace ratio 1.3, and rostral formula 39(7)/13. In the specimens from Marquesas Islands, rostrum/carapace ratio ranging from 1.3 to 1.4, and rostral formulae as follows: 34(7)/12, 38(7)/16 and 39(7)/14. In the specimens from Solomon Islands, rostrum/carapace ratio ranging from more than 1.2 to 1.35; rostral formulae: 38(9)/16 and 39(9)/13 (tip of rostrum missing in the male). These differences could be within the range of variations of the species.

Coloration. – On a color photograph of this specimen, one can observe more or less some of the red and white stripes which seem to characterise the color pattern ( Cleva, 1990: 133, Figs. 18a, b). It is likely that variations exist, as observed in other species.

Distribution. – Indonesia (315-459 m); Japan (depth not mentioned); Australia (540 m); New Caledonia and Loyalty Islands (270-390 m), Chesterfield Islands (360-610 m); French Polynesia, Marquesas Islands (285-460 m); Solomon Islands (229-269 m); Taiwan, first record, depth unknown.

Figures

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

Fig. 1. Stylodactylus major Hayashi & Miyake, 1968: (a), (b), anterior part of cephalothorax; (c), abdomen (part); (d), telson; (a) male 20 mm, TAIWAN 2002, st. CD 199; (b) male 37 mm, TAIWAN 2001, st. CD 136; (c),(d), male 32 mm TAIWAN 2001, st. CD 136. Scale bars: b= 10 mm; a, c, d = 5 mm.

Fig. 2. (a), Stylodactylus libratus Chace, 1983, male 11 mm, Su-Aou fishing Port; (b), Stylodactylus tokarensis Zarenkov, 1968, male 8.5 mm, TAIWAN 2001, st. CP 115. Scale bars= 5 mm.

Fig. 6. (a) Stylodactylus major Hayashi & Miyake, 1968, male 37 mm, TAIWAN 2001, st. CD136; (b) Stylodactylus libratus Chace, 1983, male 11 mm, Su-Aou fishing Port; (c) Stylodactylus licinus Chace, 1983, female ov. 16 mm, TAIWAN 2001, st. CD132; (d) Stylodactylus tokarensis Zarenkov,1968, male 8.5 mm, TAIWAN 2001, st. CP115; (e) Bathypalaemonella hayashii Komai, 1995, female 12.5 mm, TAIWAN 2001, st. CP139; (f) Bathypalaemonetes brevirostris (Bruce, 1986), 8.5 mm, TAIWAN 2000, st. CP58; (g) Bathypalaemonetes pilosipes (Bruce, 1986), female 10.5 mm, TAIWAN 2001, st. CD139; (h) Bathypalaemonetes chani, new species, female ov.15 mm, holotype, TAIWAN 2001, st. CD132.