Setosamon, Yeo & Ng, 2007

Tan, Zhi Wan, , Jose Christopher E. Mendoza, Yeo, & Darren C. J., 2022, Description of a new species of Setosamon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae) from Sakon Nakhon Province, northeastern Thailand, Raffles Bulletin of Zoology 70, pp. 572-579 : 578

Key to the species of Setosamon

1. Carapace anterolateral margins entire; G1 terminal segment lacking dorsal subdistal opening, dorsal flap with broad bluntly angular apex ( Ng & Naiyanetr, 1993: figs. 7A, B, 41B–E) [Nakhon Phanom, north-eastern Thailand]............ S. somchaii

– Carapace anterolateral margins weakly serrated; G1 terminal segment with dorsal subdistal opening, dorsal flap with broadly convex apex ............................................................................2

2. G1 more strongly bent outwards, dorsal flap of terminal segment relatively narrower, extending about two-thirds length of terminal segment from tip, with rounded apex skewed towards distal portion, at the distal third ( Ng & Naiyanetr, 1993: fig. 40B–E) [ Ubon Ratchathani , north-eastern Thailand]............... ...................................................................................... S. ubon

– G1 more gently bent outwards, dorsal flap of terminal segment relatively broader, extending almost entire length of terminal segment, with rounded apex in median portion ( Fig. 1A–D) [Sakon Nakhon, north-eastern Thailand].................................. ............................................................... S. sakon , new species