Eumedonus niger H. Milne Edwards, 1834

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 : 173-174

Eumedonus niger H. Milne Edwards, 1834

( Fig. 11C )

Material examined. RV Hakuhō Maru KH-72-1 cruise, sta. 50, 1Ə (CB 7.5×CL 7.7 mm), NSMT-Cr 30935.

Remarks. The male examined after ecdysis is wholly semitransparent due to decalcification ( Fig. 11C ), agreeing well with the detailed description, photographs and figures by Chia and Ng (2000) who examined the type specimens and synonymized Gonatonotus crassimanus Haswell, 1880 and Eumedonus villosus Rathbun, 1918 with this species. The front may be somewhat variable individually in the depth and width of the median incision, with V-shaped notch in this specimen just like the holotype represented by Chia and Ng (2000: fig. 1).

Distribution. Known from Japan, the East China Sea, the Philippines, and eastern and western Australia, 40–138 m depth.

Figures

Fig. 11. A–B: Bathypilumnus sinensis (Gordon), 8 (NSMT-Cr 30933; CB 8.7×CL 7.0mm) from sta. 45. C: Eumedonus niger H. Milne Edwards, Ə (NSMT-Cr 30935; CB 7.5×CL 7.7mm) from sta. 50. D: Incultus tuberculosus (A. Milne-Edwards), 8 (NSMT-Cr 30928; CB 25.3mm with epibranchial tubercles, CL 14.5mm) from sta. 45. E: Retropluma denticulata Rathbun, Ə (NSMT-Cr 30943; CB 7.8×CL 6.6 mm) from sta. 42. F: Lupocyclus philippinensis Semper, Ə infested by a Sacculina (NSMT-Cr 30924; CB 20.5mm including lateral teeth, CL 17.0mm including frontal teeth) from sta. 45.