Description
''Physogaleus'' are only known from their fossil teeth and isolated vertebra. It has teeth similar to the modern tiger shark, but smaller. Species of ''Physogaleus'' were originally described as being teeth of extinct tiger shark species in the genus ''Galeocerdo''. Recognition of numerous differences in tooth anatomies of these species with other species of ''Galeocerdo'' lead researchers to erect the genus ''Physogaleus''.Hernandez, C. 2015. Paleobiology of the Mio-Pliocene sharks, with emphasis on the extinct apex predator ''Carcharocles megalodon''. University of Florida. Unpublished Ph.D. Dissertation ''Physogaleus'' teeth are smaller than those of true tiger sharks, lacking the heavy serrations typical of ''Galeocerdo'', are more slender and can be twisted toward the crown. This indicates individuals of ''Physogaleus'' probably had a diet of bony fish, similar to the living sand-tiger shark.References
Eocene sharks Prehistoric fish of Africa {{Paleo-shark-stub