About Parathelphusa convexa De Man, 1879
This species, Parathelphusa convexa De Man, 1879, has a dark brown, trapezium-shaped carapace that features three teeth. It has small eyes, and its third maxilliped is held closed. The corpses of this crab are used for pest control: their odor attracts Leptocorisa oratoria, a species that feeds on rice ears.