Hexalaughlia orientalis ( Rathbun, 1909 ) Guinot, 2006

Guinot, Danièle, 2006, Rediscovery of the holotype of Paeduma cylindraceum (Bell, 1859) and description of a new genus of Hexapodidae (Decapoda, Brachyura), Zoosystema 28 (2), pp. 553-571 : 566

Hexalaughlia orientalis ( Rathbun, 1909) n. comb.

( Fig. 4 )

Thaumastoplax orientalis Rathbun, 1909: 113 ; 1910: 347, fig. 33, pl. 2, fig. 1. — Tesch 1918: 239 (key). — Sakai 1934: 316, fig. 24; 1935: 193, fig. 100; 1939: 579, pl. 102, fig. 3; 1976: 555, fig. 300a, b. — Imaizumi 1959: 276, fig. 5. — Takeda 1982: 200, fig. 593. — Dai & Yang 1991: 419, fig. 205(3-4), pl. 56(6).

Paeduma orientale – Manning & Holthuis 1981: 174, fig. 35. — Karasawa 1990: 25.

Paeduma orientalis – Huang et al. 2002: 652, table 1.

MATERIAL EXAMINED (specific identification with reservation). — Japan. From Kobe, Tomaga Shima Lt., Albatross, stn 4964, 65 m, 34°05’30’’N, 134°56’40’’E, 27.VIII.1906, Thaumastoplax orientalis , ♂ 5.5 × 8 mm ( USNM 46392).

REMARKS

It was not possible to examine the type material of Thaumastoplax orientalis from Thailand. The Albatross Japanese specimen bears a label from R. B. Manning indicating that it represents a new species. Mannning & Holthuis (1981: 174) add that this genus also includes “… a species from Japan, identified by earlier workers with T. [ Thaumastoplax ] orientalis , which we believe represents a new species, the description of which is in preparation”. The first occurence outside Thailand was by Sakai (1934). There are several other Japanese records (see Sakai 1976; Takeda 1982), although that material should be examined to see if it actually represents H. orientalis n. comb.

Figures

FIG. 4. — Hexalaughlia?orientalis (Rathbun,1909) n. comb.,♂ 5.5 × 8 mm, Japan,Albatross, stn 4964,27.VIII.1906,37 fms,det.Thaumastoplax orientalis (USNM 46392): A, mxp3 (flagellum of exopod not shown);B-D, different views of thoracic sternum and abdomen. Abbreviations: a1-a6, abdominal segments 1-6; c, carapace;cx1-cx4, coxae of P1-P4; e4-e7, épisternites 4-7; p, projection of sternite 4; s8, exposed portion of sternite 8; t, telson; 1-7, sternites 1-7; 4/5-6/7, thoracic sternal sutures 4/5-6/7. Scale bars: 2.5 mm.