Revision of the family Chasmocarcinidae Serène, 1964 (Crustacea, Brachyura, Goneplacoidea) Author Ng, Peter K. L. Author Castro, Peter text Zootaxa 2016 4209 1 1 182 journal article 37321 10.11646/zootaxa.4209.1.1 2de5b7bf-3975-458a-b200-07ec69f4e013 1175-5326 272646 849BAB5C-464A-4B4A-A586-5742411EDC01 Statommatia pubescens ( Chen, 1998 ) , n. comb. ( Figs. 16 G; 33D; 78A, B) Hephthopelta pubescens Chen, 1998 : 300 , 315, fig. 23 [ type localilty: South China Sea, Nansha Is.].— Jiang 2008 : 770 [in list].— Ng et al. 2008: 76 [in list]. Type material (not examined). Holotype male (5.0 × 7.9 mm ) (depository unknown), South China Sea, Nansha Is., 04°30’N , 113°30'E , 80m . Diagnosis . Carapace ( Fig. 16 G; Chen 1998 : fig. 23-1) subtrapezoidal, convex dorsally, wider than long; granular, tomentose surface; front bilobed, with shallow median cleft; anterolateral margins arcuate, without distinct lobes or teeth. Eye peduncle ( Fig. 16 G; Chen 1998 : fig. 23-1) filling orbit, short, immobile, cornea reduced. Third maxilliped ( Fig. 33 D; Chen 1998 : fig. 23-5) incompletely covering buccal cavity; merus subquadrate, ischium subquadrate, about same length as merus. Proportionally short ambulatory legs ( Fig. 16 G; Chen 1998 : fig. 23-4), pubescent. Chelipeds ( Fig. 16 G; Chen 1998 : fig. 23-2, 3) subequal in length, heteromorphic in males; fingers of minor chela scissor-like, cutting margins with small teeth; major chela with most proximal teeth enlarged. Inner margin of cheliped carpus with tooth. Male pleon ( Fig. 16 G; Chen 1998 : fig. 23-6) with proportionally long telson. G1 ( Fig. 78 A, B; Chen 1998 : fig. 23-7) slender, distal segment slightly curving outwards, with short spinules. G2 short. Female unknown. Remarks . The figure of the carapace given by Chen (1998: fig. 23-1) shows an individual with relatively long eye peduncles that seem to suggest her species may be closer to Chinommatia . This may not be very accurate, however, as the base is not drawn, and she describes three features that indicate her Hephthopelta pubescens is probably a species of Statommatia : the eyestalks do not move, the merus and ischium of the third maxilliped are quadrate and short, and the G2 is short (“tiny”) ( Chen 1998: 300, 315 ). Like some species of Chinommatia , H. pubescens was obtained from relatively shallow water. The G1 of the species illustrated by Chen (1998: fig. 23-7) is also similar in form to that of Chinommatia species, with the distal half long and slender. We are therefore confident it is in fact a species of Chinommatia and that the original drawing of the eye of H. pubescens is not accurate. The G1 of C. pubescens ( Fig. 78 A, B) is similar to that of C. knudseni ( Fig. 77 E‒G). Both species are nevertheless distinct. Compared to C. knudseni , C. pubescens has a relatively less broad carapace ( Fig. 16 G) (cf. Fig. 16 D); the dorsal carapace surface is more distinctly granular ( Fig. 16 G) (cf. Fig. 16 D); the male pleonite 6 is more elongated with a proportionately longer telson ( Fig. 16 G) (cf. Fig. 54 E); and the distal part of the G1 is gently curved rather than straight ( Fig. 78 A, B) (cf. Fig. 77 E, F). We have not been able to locate the type specimen. It does not appear to be among the type material in IOCAS where the author, H.-L. Chen, worked (W. Jiang, pers. comm.). The material of Chinommatia cavimanus (identified as Hephthopelta littoralis ) she examined are in IOCAS (see discussion for the species). The type specimen of Statommatia pubescens may have been transferred somewhere else or just misplaced. Distribution . Known only from the South China Sea. Depth: 80 m .