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Updated: May 18, 2025
Hence Hatteria is the phylogenetically oldest of all living reptiles, an isolated survivor from the Permian period, closely resembling the common ancestor of the Amniotes. It must differ so little from this extinct form, our hypothetical Protamniote, that we put it next to the Proreptilia.
Proselachii. : 16. Natidanides. Chlamydoselachius. Heptanchus. Silurian. 17. Ganoides. Plated-fishes. Proganoides. : 17. Accipenserides. Devonian. : 18. Dipneusta. Paladipneusta. : 18. Neodipneusta. Ceratodus. Protopterus. Carboniferous. : 19. Amphibia. Stegocephala. : 19. Phanerobranchia. Salamandrina. Permian. : 20. Reptilia. Proreptilia. : 20. Rhynchocephalia. Primitive lizards. Hatteria.
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