ETHUSINAE, Guinot, 1977:, 1052

Castro, Peter, 2005, Crabs of the subfamily Ethusinae Guinot, 1977 (Crustacea, Decapoda, Brachyura, Dorippidae) of the Indo-West Pacific region, Zoosystema 27 (3), pp. 499-600 : 506

KEY TO GENERA OF SUBFAMILY ETHUSINAE

1. Basal antennular article normal, not abnormally enlarged or swollen; eye peduncles, eyes visible dorsally. P2, P3 relatively stout, short, not extending well over frontal teeth when folded ...................................................................... Ethusa Roux, 1830

— Basal antennular article moderately or greatly enlarged, swollen, pushing eye peduncles laterally; eye peduncles and eyes usually not visible or only partially visible dorsally. P2, P3 relatively slender, long, extending over or well over frontal teeth when folded .......................................................................................................... 2

2. Dorsal surface of carapace typically granular, with setae or short tomentum; distinct regions of carapace evident; four frontal teeth ........................ Ethusina Smith, 1884

— Dorsal surface of carapace smooth, without conspicuous setae or tomentum; regions of carapace not distinct; two or four frontal teeth .................. Parethusa Chen, 1997