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Acleistorhinus (ah-kles-toe-RYE-nuss) is an extinct genus of parareptile known from the Early Permian (middle Kungurian stage) of Oklahoma. [1] It is notable for being the earliest known anapsid reptile yet discovered.
Numerous parareptile lineages appeared during the early Permian and the group reached a cosmopolitan distribution. Parareptile diversity declined towards the end of the Permian and procolophonoids, which first appeared during the Late Permian, were the only group of parareptiles to survive the Permian–Triassic extinction event. Procolophonid ...
Acleistorhinidae is notable for being the oldest-known parareptilian clade. The family is diagnosed by the presence two synapomorphies: (1) the largest tooth is located far anteriorly on the maxilla; and (2) cranial ornamentation consists of sparse and shallow circular dimples. [2]
Carbonodraco is the oldest known parareptile, and is slightly older than Erpetonyx, the previously oldest known parareptile. Specimens of Carbonodraco are limited to skull and jaw fragments found at the Ohio Diamond Coal mine in Linton, Ohio.
However, Hylonomus, the oldest eureptile known from fossil evidence, lived millions of years before parareptiles appeared in the fossil record. The discovery of Erpetonyx helped to shorten this gap between parareptile and eureptile fossils, as Erpetonyx lived in the Late Carboniferous and is one of the oldest known parareptiles (though ...
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Scientists have found what they believe are Europe’s oldest pair of shoes in a Spanish cave network populated by bats.. The discovery of the grass-woven sandals in Cueva de los Murciélagos, or ...
The oldest known owenettid, Owenetta rubidgei, dates back to the Wuchiapingian stage of the Late Permian. It and Saurodektes , have been found from the Beaufort Group in the Karoo Basin of South Africa , while Barasaurus is known from the Late Permian and the Early Triassic of Sakamena Group in Madagascar .