Gonatonotus pentagonus White, 1847

Manikandan, K, Megalaa, N, Valliappan, Subramanian, Nandini, K, Rani, Lourdu V, Dakshinamurthi, Senthil & Nagappan, Nagappan, 2022, Crabs (Crustacea, Decapoda) from the Seas of East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 3. Sahul Shelf, Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (2), pp. 35-83 : 71

Gonatonotus pentagonus White, 1847

( Fig. 13E )

Material examined. RV Hakuhō Maru KH-72-1 cruise, sta. 29, 2 ƏƏ( CB 8.4×CL 7.3 mm; 10.5× 8.4 mm, soft, deformed), 1$ (7.6× 7.5 mm), NSMT-Cr 30751. — Sta. 32, 1Ə ( CB 5.1×CL 4.6 mm), NSMT-Cr 30752.

Remarks. Gonatonotus pentagonus was fully described and figured by Chia and Ng (2000), differing from two congeners, Gonatonotus granulosus ( MacGilchrist, 1905) and G. nasutus Chia and Ng, 2000 , in the frontal margin hardly reaching beyond the orbits. One of the specimens, a male from sta. 29, is soft-shelled and somewhat deformed, but another male ( Fig. 13E ) is in good condition and agrees well with the description, line drawings and photographs of many specimens, including the holotype, given by Chia and Ng (2000: figs. 16–19).

Distribution. Chia and Ng (2000) recorded many specimens from Indonesia, Singapore, Thailand and Australia, 9–54 m in depth.

Figures

Fig. 13.ɹA–B: Pseudolambrus bidentatus (Flipse), Ə (NSMT-Cr 30729; CB 24.5mm×CL 23.9mm) from sta. 29. C: Mclaydromia colini Guinot and Tavares, Ə(NSMT-Cr 30698; CB 4.5×CL 5.1mm) from sta. 29. D: Lupocycloporus gracilimanus (Stimpson), ovig. $ (NSMT-Cr 30733; CB 24.4 excluding lateral tubercles×CL 17.3mm) from sta. 29. E: Gonatonotus pentagonus (White), $ (NSMT-Cr 30751; CB 7.6×CL 7.5mm) from sta. 29. F: Charybdis (Charybdis) jaubertensis Rathbun, Ə(NSMT-Cr 30731; CB 11.3×CL 8.9mm)from sta. 29.