Charybdis (Charybdis) natator (Herbst)

Species of a good size
frontal teeth rounded at tip
first and second anterolateral teeth truncate at tip,last one not larger than preceding one
chelipeds tuberculated,palm with five teeth in all
Dorsal surface of carapace uniformly covered with soft tomemtum
penultimate segmnet of male abdomen not convex on lateral borders.
under surface of palm unifromly covered with squamiform ridges, marked with longitudinal sulcus