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.