Rostrum long, extending beyond antennular peduncle, slightly sinuous, armed with 7 to 9 dorsal teeth, but toothless on its distal half; postrostral ridge ending near posterior margin of carapace; adrostral crest reaching as far as epigastric tooth, adrostral groove a little beyond; branchiocardiac groove almost reaching to middle of carapace; telson armed only with spinules; no ischial spine on first pereopod. In adult males, basial spine of third pereopod extremely long and barbed, and merus of fifth pereopod with 1 or 2 large, triangular teeth; each distomedian projection of petasma with a short filament on ventral surface and another on dorsal surface; distolateral projections directed forward.