Moguai elongatum ( Rathbun, 1931 )

Naruse, Tohru, 2005, Species of Moguai Tan and Ng, 1999 (Decapoda: Brachyura: Camptandriidae) from brackish waters in the Ryukyu Islands, Japan, with the description of a new species, Zootaxa 1044, pp. 57-64 : 61-62

Moguai elongatum ( Rathbun, 1931)

( Fig. 1 b)

Camptandrium elongatum — Rathbun 1931: 95, pl. 13, figs. 40–43; Shen 1935: 33, fig. 10A–C; 1940a: 73, 93; 1940b: 234; Shen & Dai 1964: 115; Manning & Holthuis 1981: 199; Dai et al.

1986: 439, fig. 246; Dai & Yang 1991: 482, pl. 61 (3), fig. 246(1). Moguai elongatum — Tan & Ng 1999: 205, figs. 3C, D, G, 4D, E.

Material examined. 1 male, CL 2.8 mm, 2 females, CL 2.3, 3.2 mm, RUMF­ZC­32, Motonagura, Ishigaki I., coll. T. Naruse & T. Nagai, 21 Dec. 2004; 1 female, CL 5.1 mm, RUMF­ZC­33, Motonagura, Ishigaki I., coll. T. Naruse & T. Nagai, 20 Mar. 2005.

Remarks. The specimens from Ishigaki Island agree well with the description of M. elongatum by Rathbun (1931) and Tan & Ng (1999). The range of this species is extended east from Fukien Province, China.

Shokita (1990) had recorded M. elongatum from Iriomote I., which is located less than 20 km west of Ishigaki I., but he did not provide a description or figure. Shokitaís (1990) material is almost certainly lost (S. Shokita, pers. comm.), and as such, the identity of his specimens cannot be determined.

Specimens from Ishigaki I. were collected from riverbeds of river mouths, with a pebbly­sandy substratum. The locality is exposed by seawater at high tide.

Figures

FIGURE 1 Moguai pyriforme, sp. nov. and M. elongatum (Rathbun, 1931). a, M. pyriforme, Holotype, female, RUMF­ZC­ 31, CL 5.0 mm; b, M. elongatum, female, RUMF­ZC­ 33, CL 5.1 mm