Podophthalmus nacreus Alcock, 1899

Arzivian, Arteen, Alrubaie, Ahmad, Yang, Jessica, Lin, Huiyu, Zhang, Eva & Leong, Rupert, 2022, Crabs (Crustacea, Decapoda) from the Seas of East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 4. South China Sea, Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (4), pp. 147-191 : 169

Podophthalmus nacreus Alcock, 1899

( Fig. 1C )

Material examined. RV Hakuhō Maru KH-72-1 cruise, sta. 45, 1 8 (CB 11.0×CL 7.1 mm), NSMT-Cr 30925.

Remarks. The female at hand ( Fig. 1C ) is not fully mature, but is clearly identifiable with Podophthalmus nacreus , with the hexagonal carapace armed with a strong epibranchial tooth and the long eyestalk having a large cornea.

Ng et al. (2017) transferred P. nacreus to the genus Vojmirophthalmus erected by Števčič (2011) to accommodate P. minabensis Sakai, 1961 , but P. nacreus as well as P. vigil are generically distinct from V. minabensis by the unusually ornamented eyestalk of the latter species ( Sakai (1961: pl. 4 fig. 1; 1976: fig. 207a, pl. 135 fig. 1) and Huang and Shih (2021: fig. 3E).

Distribution. Indo-West Pacific from Japan through Taiwan, the Philippines, and Indonesia to New Caledonia in the Pacific, and from Western Australia through the Andaman Sea and the Gulf of Martaban to Madagascar, 30–126 m depth ( Alcock, 1899b; Leene, 1938, 1940; Sakai, 1939, 1965, 1976; Crosnier and Thomassin, 1974; Moosa, 1981; Hosie, 2012).

Figures

Fig. 1. A: Mclaydromia colini Guinot and Tavares, 8 (NSMT-Cr 30898; CB 13.1×CL 15.0mm including pseudorostral teeth) from sta. 45. B: Mursia australiensis Campbell, juv. (NSMT-Cr 30905; CB 8.2mm excluding lateral tubercles, CL 7.4 mm) from sta. 52. C: Podophthalmus nacreus Alcock, 8 (NSMT-Cr 30925; CB 11.0×CL 7.1mm) from sta. 45. D: Lissocarcinus arkati Kemp, 8 (NSMT-Cr 30921; CB 9.8×CL 8.7mm) from sta. 45. E–F: Parilia pattersoni Ng, Devi and Kumar, juv. (NSMT-Cr 30906; CB 5.6×CL 6.6mm including posterior median tubercle) from sta. 42.