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Araeoscelidia
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Araeoscelidia or Araeoscelida is a clade of extinct tetrapods superficially resembling lizards, extending from the Late Carboniferous to the Early Permian. The group contains the genera Araeoscelis, P
Petrolacosaurus BW
Petrolacosaurus BW
Protorothyris
Protorothyris
Mesosaurus BW
Mesosaurus BW
Amniote
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Amniotes are tetrapod vertebrate animals belonging to the clade Amniota, a large group that comprises the vast majority of living terrestrial and semiaquatic vertebrates. Amniotes evolved from amphibi
Araeoscelidia
…2011, showing classical position of Araeoscelidia at the base of Diapsida sister to Neodiapsida: However, Simões et al. (2022) recover them as stem-amniotes instead, as the sister group to the clade including Captorhinidae and Protorothyris archeri. Cladogram of Reptilia after Jenkins et al 2025, which found…
Amniota
Amniota
Archaeothyris, one of the most basal synapsids, first appears in the fossil records about 306 million years ago.
Archaeothyris, one of the most basal synapsids, first appears in the fossil records about 306 million years ago.
By the Mesozoic, 150 million years ago, sauropsids included the largest animals anywhere. Shown are some late Jurassic dinosaurs, including the early
By the Mesozoic, 150 million years ago, sauropsids included the largest animals anywhere. Shown are some late Jurassic dinosaurs, including the early bird Archaeopteryx perched on a tree stump.