Carapace smooth. Rostrum armed with 9 to 11 teeth on dorsal, and a single tooth on ventral margin, with an accessory crest on the blade; adrostral crest and groove long, extending almost to posterior margin of carapace, the groove wide; postrostral crest well developed as far back as adrostral groove, with a deep median groove throughout its length; gastrofrontal crest present; gastrofrontal groove bifurcate posteriorly; hepatic crest almost horizontal to base of antennal crest and from there sloping anteroventrally; telson armed with 3 pairs of movable spines; no ischial spine on first pereopod.