Geothelphusa, Stimpson, 1858

Naruse, Tohru, Shokita, Shigemitsu & Ng, Peter K. L., 2006, A revision of the Geothelphusa leIJicerIJix species group (Crustacea: Decapoda: Brachyura: Potamidae), with descriptions of three new species, Journal of Natural History 40 (13 - 14), pp. 759-781 : 776-778

Key to species of Geothelphusa leυicerυix species-group

1. Anterolateral margin faintly cristate or not cristate......... 2

– Anterolateral margin distinctly cristate............. 4

2. Male G1 very slender, total length to width ratio of G1 5.45–6.69, distal margin of subterminal segment narrower than middle part......................... Geothelphusa leυicerυix ( Rathbun, 1898)

– Male G1 not very slender, distal margin of subterminal segment subequal with middle part..................... 3

3. Outer proximal angle of the subterminal segment of G1 with prominent knob............... Geothelphusa kumejima n. sp.

– Outer proximal angle of the subterminal segment of G1 with small knob.............. Geothelphusa grandioυata n. sp.

4. G1 stout, terminal segment strongly directed outwards. Geothelphusa iheya n. sp.

– G1 slender, terminal segment gently directed outwards................ Geothelphusa miyakoensis Shokita, Naruse, and Fujii, 2002