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Temporal range: Middle Pennsylvanian, 312–304 Ma
Skull diagram
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Genus: Paleothyris
Carroll, 1969
Species: P. acadiana
Binomial name
Paleothyris acadiana
Carroll, 1969

Paleothyris was a small, agile, anapsid romeriidan reptile which lived in the Middle Pennsylvanian epoch in Nova Scotia (approximately 312 to 304 million years ago). Paleothyris had sharp teeth and large eyes, meaning that it was a nocturnal hunter. It was about a foot long. It probably fed on insects and other smaller animals found on the floor of its forest home. Paleothyris was an early sauropsid, yet it still had some features that were more primitive, more labyrinthodont-like than reptile-like, especially its skull, which lacked fenestrae, holes found in the skulls of most modern reptiles and mammals.

See also[edit]