Carcinoplax tomentosa Sakai, 1969

Castro, Peter, 2007, A reappraisal of the family Goneplacidae MacLeay, 1838 (Crustacea, Decapoda, Brachyura) and revision of the subfamily Goneplacinae, with the description of 10 new genera and 18 new species, Zoosystema 29 (4), pp. 609-774 : 648

Carcinoplax tomentosa Sakai, 1969

Carcinoplax tomentosa Sakai, 1969: 270 [in list], 271, figs 16a, 17c, 18a; 1976: 524 [in key], 526, fig. 280, pl. 190, fig. 2 [ Japan]. — Serène & Lohavanijaya 1973: 62 [in list]. — Guinot 1989: 313 [discussion], figs 33, 41, pl. 10, fig. H [holotype]. — Miyake 1991: 146, 220 [in list], pl. 49, fig. 4 [ Japan]. — Ikeda 1998: 15, 42, 136, pl. 56 [ Japan]. — Muraoka 1998: 47 [in list], pl. 1, fig. 7 [colour] [ Japan]. — Watanabe & Muraoka 1999: 41, fig. 1 [ Japan]. — Ng et al. 2001: 33 [ Taiwan]. — Hsueh & Huang 2002: 119 [in key], 120, figs 2E, 7 [ Taiwan]. — Takeda et al. 2006: 204 [in list] [ Japan].

Carcinoplax aff. tomentosa – Serène & Vadon 1981: 118, 119, 123, 126 [Philippine Is].

TYPE MATERIAL. — Status and location of holotype unknown; dry ♂ paratype ( KPM NH106666) (see Muraoka 1998: 47, pl. 1, fig. 7 [colour]) .

TYPE LOCALITY. — Japan, Tosa Bay, 150- 200 m.

MATERIAL EXAMINED. — Japan. Honshu, Boso Peninsula, off Kanaya, 200-250 m, H. Tejima coll., II.1997, 1 ♂ ( CBM-ZC 3517).

?Honshu, Kii Peninsula, off Shinomisaki, 300 m, S. Nagai coll., X.1996, 1 ♂ ( CBM-ZC 3570).

Taiwan. Tai-Chi fishing port, P. K. L. Ng coll., 3- 4.VIII.1996, 1 ♀ ( ZRC 1997.748). — P. K. L. Ng & K. Lim coll., V.1999, 1 ♂ ( ZRC 1999.0775). — IV.2003, 1 ♂ ( NTOU). — Sugo, Nangfangao fishing port, commercial inshore trawlers, 100-400 m, P. K. L. Ng & K. Lim coll., V.1999, 1 ♂ ( ZRC 1999.0808). — 7.VI.1999, 1 ♂ ( ZRC 1999.0720). — XI.2000, 2 ♂♂ ( ZRC 2001.0020). — P. K. L. Ng coll., 5.XI.2000, 1 ♂ cl 37.8 mm, cw 49.6 mm ( ZRC 2001.0021). — Kaohsiung, Tungkang fishing port, P. K. L. Ng & H.-P. Ho coll., 6.XI.2000 ( ZRC 2001.0022). — 11.VIII.2003, 1 ♂ ( NTOU).

TAIWAN 2001, stn CP 113, 24°50.8’S, 121°59.9’E, 281 m, 21.V.2001, 1 ♂ ( MNHN-B 29692).

DISTRIBUTION. — Western Pacific Ocean from Japan to Taiwan and questionably the Philippine Is (doubtful record by Serène & Vadon 1981). Depth: 150- 300 m.

REMARKS

Diagnostic of C. tomentosa , as its name implies, is the conspicuous short tomentum on the carapace, chelipeds (P1), and ambulatory legs (P2-P5). In the largest individuals the carapace becomes smooth, devoid of tomentum, but the ambulatory legs still show the tomentum. A small male (cl 6.7 mm, cw 8.8 mm, CBM-ZC 3570) from Japan, doubtfully identified as belonging to this species, only had a short tomentum throughout the carapace and legs.

Serène & Lohavanijaya (1973: 62, 63) stated that C. tomentosa does not belong in the genus Carcinoplax because of the presence of a short G2. The G2 of specimens examined during this study was actually slightly longer than the G1, raising the possibility that the specimens referred to by Serène & Lohavanijaya (1973) belonged to another, yet unidentified, species. The Philippine material identified by Serène & Vadon (1981) as C. aff. tomentosa also appears to be lost.