Hadoneinidae
Hadoneinidae is a family of extinct cartilaginous fishes belonging to the order Euselachii. These ancient sharks lived during the Mesozoic Era, with fossils primarily found in deposits dating back to the Jurassic and Cretaceous periods. The family is characterized by distinct dental morphology, with numerous small, flattened teeth that were likely adapted for crushing or grinding. Unlike many modern sharks that possess large, serrated teeth for tearing flesh, hadoneinid teeth suggest a diet that may have included hard-shelled invertebrates or other benthic organisms.
The fossil record of Hadoneinidae is relatively sparse, with most discoveries consisting of isolated teeth. However,