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 Chinommatia littoralis ( Tesch, 1918 ) n. comb. ( Figs. 15 A; 25E; 32C; 43H) Hephthopelta littoralis Tesch, 1918 : 233 , pl. 9, fig. 3 [ type localilty: Indonesia ] .— Serène 1968 : 92 [in list].— Zarenkov 1972 : 238 , figs. 1–4 [Vietnam]. — Jiang 2008 : 770 [in list] [South China Sea].—Ng et al. 2008: 76 [in list]. Not Hephthopelta littoralis— Chen 1998 : 298 , fig. 22 [Nansha Is, 53‒105 m ]. [= Chinommatia cavimanus ( Rathbun, 1914] Type material . Holotype female (3.5 × 4.9 mm ) (NNM-ZMA), Indonesia , north coast of Ceram , Waru Bay , Siboga Expedition , stn 174, 18 m, 0 7.1899. Diagnosis . Carapace ( Fig. 15 A; Tesch 1918 : pl. 9, fig. 3, as Hephthopelta littoralis ) subtrapezoidal, convex, short tomentum, 1.4 wider than long in female holotype; front nearly straight; anterolateral margins arcuate, minutely granular with granules higher along lateral margins, without distinct lobes or teeth. Eye peduncle ( Fig. 25 E) long. Epistome ( Fig. 25 E) with semicircular median lobe, semicircular lateral margins. Third maxilliped ( Fig. 32 C; Zarenkov 1972 : fig. 1– 4III , as H. littoralis ) merus ovate, anteroexternal angle rounded; ischium rectangular, slightly longer than merus. Proportionally short ambulatory legs ( Fig. 15 A), with short tomentum ( Tesch 1918: pl. 9, fig. 3, as H. littoralis ). Fingers of minor chela of female holotype ( Fig. 43 H) subcircular in cross-section, scissorlike, cutting margins with short teeth. Inner margin of cheliped carpus with short tooth ( Tesch 1918 : pl. 9, fig. 3, as H. littoralis ; Zarenkov 1972 : fig. 1– 4I , as H. littoralis ). Fused thoracic sternites 1, 2 semicircular, proportionally narrow, long. Male, adult female unknown. Remarks . The holotype specimen is a small female, but in all key characters, it appears to be a species of Chinommatia n. gen. Zarenkov (1972) reported “ Hephthopelta littoralis ” from the South China Sea , and it agrees well with the type , although his specimen is depicted with teeth on the cheliped meri rather than tubercles ( Zarenkov 1972: fig. 1– 4I ). They otherwise agree in the form of the carapace, long eye peduncles, and the morphology of the third maxillipeds, and thus we believe they are conspecific. The shallow-water record of Zarenkov’s South China Sea material ( 10–72 m ) also supports their conspecificity (the type was from 18 m ). The male pleon, chelae, and gonopod features as figured by Zarenkov (1972) support the inclusion of the species in Chinommatia n. gen. Distribution . Western Pacific Ocean ( Indonesia and South China Sea). Depth: 10– 72 m .