Unique Characters: Large sharks. Head with 5 medium-sized gill slits, all in front of pectoral-fin bases, their upper ends not extending onto dorsal surface of head. Eyes small or moderately large, without nictitating eyelids; no nasal barbels or nasoral grooves. Lower labial furrows present at mouth corners. Two moderately large high dorsal fins, the first dorsal fin originating well in advance of the pelvic fins. Caudal peduncle not depressed, without keels; a deep upper precaudal pit present but no lower pit.
Similar Species: None.