Ceresiosauridae

Ceresiosauridae is an extinct family of thalattosaurs, marine reptiles that lived during the Middle Triassic period. These reptiles were characterized by their elongated bodies and paddle-like limbs, adapted for a life in the sea. The family name is derived from Ceresiosaurus, the type genus, which means "lizard of Ceres".

Thalattosaurs, including Ceresiosauridae, are thought to have been predominantly herbivorous or omnivorous, feeding on algae or small invertebrates. Their fossil record is primarily found in Europe, with significant discoveries in Switzerland and Italy. The anatomical features of Ceresiosauridae suggest they were relatively agile swimmers, capable of navigating shallow marine environments.

The taxonomic position of Ceresiosauridae within the larger group of thalattosaurs is generally well-established. While other thalattosaur families exist, Ceresiosauridae represents a distinct lineage within this group. Their specialized adaptations for a marine existence provide valuable insights into the diversification of reptiles during the Triassic, a period of significant evolutionary change following the Permian-Triassic extinction event. The study of Ceresiosauridae contributes to our understanding of marine ecosystems and the paleobiogeography of the ancient Tethys Ocean.