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Mesosaurus
Extinct genus of reptile from the early Permian of South Africa / From Wikipedia, the free encyclopedia
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Mesosaurus (meaning "middle lizard") is an extinct genus of reptile from the Early Permian of southern Africa and South America. Along with it, the genera Brazilosaurus and Stereosternum, it is a member of the family Mesosauridae and the order Mesosauria. Mesosaurus was long thought to have been one of the first marine reptiles, although new data suggests that at least those of Uruguay inhabited a hypersaline water body, rather than a typical marine environment.[3] In any case, it had many adaptations to a fully aquatic lifestyle. It is usually considered to have been anapsid, although Friedrich von Huene considered it to be a synapsid.[4] Recent study of Mesosauridae phylogeny places the group as either the basal most clade within Parareptilia or the basal most clade within Sauropsida (with the latter being the less supported position)[5] despite the skull of Mesosaurus possessing the "Synapsid condition" of one temporal fenestra.[6][7]
Mesosaurus | |
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Holotype of Mesosaurus tenuidens (specimen MNHN 1865-77) | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Clade: | †Parareptilia |
Order: | †Mesosauria |
Family: | †Mesosauridae |
Genus: | †Mesosaurus Gervais, 1865[1] |
Species: | †M. tenuidens |
Binomial name | |
†Mesosaurus tenuidens Gervais, 1865[1] | |
Synonyms | |
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