THE ORIGIN AND EARLY DIVERGENCE OF THERAPSIDS
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dc.contributor.author | Ivakhnenko M.F. | |
dc.date.accessioned | 2021-06-11T04:57:52Z | |
dc.date.available | 2021-06-11T04:57:52Z | |
dc.date.issued | 2002 | |
dc.identifier | https://elibrary.ru/item.asp?id=13412133 | |
dc.identifier.citation | Paleontological Journal, 2002, 36, 2, 168-175 | |
dc.identifier.issn | 0031-0301 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/29001 | |
dc.description.abstract | The study of the temporal area of skulls in various theromorph groups demonstrated that the Ophiacodontia retain a primitive epipteric cavity between the braincase wall and the adductor fossa, which is limited laterally by the palatoquadrate structures (epipterygoid and quadrate); in the Sphenacodontia, the lateral wall of the cavity is reduced and the adductor musculature approaches the lateral surface of the braincase. This process progressed in primitive therapsids (Eotheriodontia: Gorgonopia, Dinocephalia, and Anomodontia). In higher therapsids (Eutheriodontia: Scaloposauria, Therocephalia, and Cynodontia), the epipteric cavity is retained but its lateral wall in the periotic region is formed by the squamosal. As a result, the Sphenacodontia and Eotheriodontia form a morphologically uniform group that should be opposed to the Eutheriodontia. | |
dc.title | THE ORIGIN AND EARLY DIVERGENCE OF THERAPSIDS | |
dc.type | Статья |
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