Petrolisthes scabriculus (Dana, 1852)

(Fig. 8 C, D)

Porcellana scabriculus Dana, 1852: 424 (type locality: Sulu Sea); 1855: pl. 28, fig. 13. Petrolisthes scabriculus.— Haig, 1964: 358, fig. 2; 1979: 120, fig. 1.— Nakasone & Miyake, 1968b: 107, text-fig. 6.— Hsieh et al., 1997: 291, figs. 5F, 10.

Material examined. New Caledonia. Maitre Islet, lagoon, 22°10.35’S, 166°25.85’E, 21 m, 10 Nov. 1995, coll. J. Lowry, 2 males CL 5.8, 6.6 mm. Woodin Channel, lagoon, 18 Nov. 1992, coll. J.-L. Menou, 2 males CL 3.6, 5.2 mm. Pins Island, lagoon, Aug. 1993, coll. Menou, 1 female CL 5.6 mm, 1 ovig. female CL 7.8 mm. Maitre Islet, lagoon, 22°19.35’S, 166°25.85’E, 10 m, sponge, coll. I. Takeuchi, 10 Nov. 1995, 1 male CL 5.8 mm, 2 females CL 4.1, 5.2 mm, 1 ovig. female CL 4.9 mm. Maitre Islet, lagoon,, 22°19.35’S, 166°25.85’E, 20 m, green sponge, coll. I. Takeuchi, 10 Nov. 1995, 3 males CL 4.0– 7.6 mm, 3 ovig. females CL 4.7–6.3 mm. Maitre Islet, lagoon, 3 m, 13 Sep. 1978, coll. C. Vadon, 1 male CL 6.1 mm. Récif du Croissant, reef, lagoon, 9 m, coral, 29 Sept. 1978, coll. C. Vadon, 1 male CL 3.8 mm. Lagon, St. 253, 22°22’S, 166°23’E, 16 m, coll. B. Richer de Forges/ ORSTOM, 2 males CL 5.6, 6.3 mm. Récif du Croissant, lagoon, 5 m, coral, 21 Sep. 1978, coll. C. Vadon, 1 male CL 5.4 mm, 1 female CL 4.0 mm. Nouméa., lagoon, St. 258, 22°21’S, 166°21’E, 10 m, coll. B. Richer de Forges/ ORSTOM, 1 ovig. female CL 5.6 mm. Maitre Channel, lagoon, 20 m, tubes of Eunicidae, Jun. 1992, coll. P. Bouchet, 2 male CL 4.6, 7.6 mm, 1 female CL 5.6 mm, 1 ovig. female CL 7.7 mm. Maitre Islet, lagoon, 6–8 m, 29 Mar. 1993, coll. P. Bouchet, 1 ovig female CL 5.2 mm. Récif du Larégnère, lagoon, 12–16 m, 3 May 1993, 2 male CL 3.9, 5.0 mm, 1 female CL 5.1 mm. Séche Croissant, lagoon, 22°19.90’S, 166°22.30’E, 13 m, Pocillopora sp., 26 Apr. 1995, 1 female CL 4.7 mm. Passe de Boulari, lagoon, St. 505, Pocillopora, 12 Apr. 1994, coll. J.-L. Menou, 1 male CL 2.8 mm. Grande Rade, lagoon, 10–11 m, 14 Apr. 1993, coll. P. Bouchet, 1 male CL 4.0 mm. South of Grand Récif, St. 294, 22°42’S, 166°43’E, 21 m, coll. B. Richer de Forges/ ORSTOM, 1 male CL 6.5 mm. Pins Island, St. 589, 22°32’S, 167°24’E, 31 m, 18 Jul. 1985, coll. B. Richer de Forges-ORSTOM, 1 ovig. female CL 6.3 mm. Pins Island, St. 593, 22°33’S, 167°20’E, 25 m, 18 Jul. 1985, coll. B. Richer de Forges-ORSTOM, 1 male CL 5.0 mm. Ouen Island, Prony Bay, lagoon, St. 110, 22°24’S, 166°47’E, 40 m, coll. B. Richer de Forges/ ORSTOM, 2 males CL 4.3, 5.8 mm. Nouméa, St. 283, 122 °27’S, 166°24’E, 3 m, coll. B. Richer de Forges/ ORSTOM, 1 female CL 3.0 mm. N/ O "Alis" Campagne SURPRISES, St. DW1395, 18°17.6’S, 163°01.9’E, 34–36 m, 13 May 1999, coll. B. Richer de Forges-IRD, 1 male CL 3.4 mm, 1 female CL 4.4 mm.

Loyalty Islands. Lifou Island. Santal Bay. Atelier LIFOU. St. 1458 (St. 3), Ngoni, 20°46.7’S, 167°03.1’E, 17–24 m, dredge, 4 Nov. 2000, 1 female CL 5.5 mm. St. 1451 (St. 48B), Esao, 20°47.3’S, 167°06.8’E, 10–21 m, 19 Nov. 2000, 1 male CL 6.3 mm, 1 ovig. female CL 5.6 mm. St. 1454 (St. 58), Cap Lefèvre (= Nem), 20°56.65’S, 167°02.0’E, 15–18 m, 23 Nov. 2000, 1 ovig. female CL 5.0 mm. St. 1434 (St. 12), Huca Htighé Island, 20°52.5’S, 167°08.1’E, 5–20 m, 6 Nov. 2000, 1 male CL 3.3 mm. St. 1410 (St. 63A), between Cap Wekutr and Cap Wajez, 20°56.7’S, 167°03.1’E, 2–4 m, 25 Nov. 2000, 1 male CL 2.3 mm. St. 1410 (St. 63B), between Cap Wekutr and Cap Wajez, 20°56.7’S, 167°03.1’E, 2–4 m, 25 Nov. 2000, 1 male CL 2.3 mm. St. 1457 (St. 67), Ngoni, 20°46.8’S, 167°02.75’E, 5–10 m, 27 Nov. 2000, 1 male CL 4.9 mm, 1 ovig. female CL 6.1 mm.

Remarks. The relationships between this species and two congeners, P. militaris and P. heterochrous, are discussed in the Remarks of P. militaris.

Distribution. Gulf of Thailand, Philippines Islands, Indonesia, New Guinea, western and eastern Australia, Nansha Islands in China; Taiwan, Ryukyu Islands, New Caledonia, and the Loyalty Islands; shallow water to about 55 m, frequently in association with corals (Haig 1979; Hsieh, et al. 1997; Yang & Naiyanetr 1997; present study).