Synapsid Skull Replicas
| Oedaleops campi skull replica ("Pelycosauria")
| Thrinaxodon sp. skull replica ("Cynodontia")
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| Lystrosaurus sp. skull replica ("Therapsida")
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Basal Reptiles
Cast of a Mesosaurus braziliensis fossil
Clade Parareptilia
Early Permian Period, 278-270 Ma; Brazil
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Possible life appearance of Mesosaurus:
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Barasaurus besairiei fossil
Clade Parareptilia
Late Permian Period, 252-247 Ma; Madagascar
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Marine Reptiles (Euryapsida)
Replica of a juvenile Stenopterygius sp. fossil
Clade Ichthyosauria
Early Jurassic Period, 183-179 Ma; Europe
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Possible life appearance of (adult) Stenopterygius:
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Replica of a Xinpusaurus kohi skeleton
Clade Thalattosauria
Late Triassic Period, 237-232 Ma; China
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Keichousaurus hui fossil
Clade Nothosauria
Middle Triassic Period, 245-234 Ma; China
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Possible life appearance of Keichousaurus:
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Cast of a Sinocyamodus sinpuensis fossil
Clade Placodontia
Late Triassic, 237-227 Ma; China
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Partial fossil shell of a Stylemys nebrascensis turtle
Clade Testudines
Paleogene, Oligocene Epoch, 35-31 Ma; South Dakota
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Stem-Archosaurs (Archosauromorphs)
Juvenile Hyphalosaurus lingyuanensis fossil
Clade Choristodera
Early Cretaceous Period, Yixian Formation, 125 Ma; China
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Possible life appearance of Hyphalosaurus:
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Replica of the only fossil of Sharovipteryx mirabilis
Clade Protorosauria
Late Triassic Period, 225 Ma; Russia
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Replica of Icarosaurus siefkeri fossil
Clade Allokotosauria?
Late Triassic Period, 228 Ma; New Jersey
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Possible life appearance of Icarosaurus:
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