Upper teeth have distally curved crowns, coarse serrations not continued to the apex; root high and compressed. Lower teeth have unserrated, long, pointing and lingually inclined crowns, small cusplets near the base, and bilobate roots.

Size: 5-25 mm (height)

Ecology: inhabited tropical nearshore and offshore waters (1 to 30 m), feeding on bony fish, other sharks, ray, crabs and cephalopods; estimated to reach 6 m in length.

Geological range: Oligocene-Pliocene.

Geographic distribution: fossil record in the Caribbean and Pacific.