Toxonotus

Toxonotus is an extinct genus of prehistoric ray-finned fish belonging to the family Pycnodontidae. These fish lived during the Late Cretaceous period, specifically in the Cenomanian age. Fossil remains of Toxonotus have been found in marine deposits, indicating they were saltwater fish. They are characterized by their deep-bodied, laterally compressed shape, a common trait among pycnodontids, suggesting a lifestyle possibly associated with coral reefs or other complex marine environments.

Like other pycnodontids, Toxonotus likely possessed a durophagous diet, meaning they were adapted to crush hard-shelled prey such as mollusks, crustaceans, and possibly even echinoderms. Their dentition consisted of rounded, pavement-like teeth suitable for this purpose. Their bodies were covered in thick, rhomboid scales.

The genus Toxonotus contributes to the understanding of fish diversity and paleoecology during the Late Cretaceous, providing insights into the structure and function of ancient marine ecosystems. Further research and discoveries may refine the current understanding of this extinct fish genus.