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Tappenosaurus : ウィキペディア英語版 | Tappenosaurus
''Tappenosaurus'' ("Tappen's lizard") is an extinct genus of synapsid from the Middle Permian of Texas. American paleontologists Everett C. Olson and James Beerbower described the genus in 1953 based on three specimens that were uncovered from the San Angelo Formation. It was named for Dr. Neil Tappen, who found the type specimen in 1951 as a member of the field party. The first specimen (the holotype) is a fragmentary skeleton including parts of the back of the skull, pieces of teeth and ribs, an axis vertebra, a dorsal vertebra, three neural spines, the ends of both humeri and a partial hip. The second specimen includes cervical vertebrae, a rib, and a scapulocoracoid. The third specimen is only represented by ribs. These bones are larger than comparable parts of the largest skeletons of ''Dimetrodon'', a closely related and much better known sail-backed synapsid. Olson and Beerbower designated the type species ''Tappenosaurus magnus'' in reference to its large size, and also placed it in its own family, Tappenosauridae.〔 Olson later estimated the total length of ''Tappenosaurus'' to be , comparing it in size with the largest of the dinocephalians, a more advanced group of synapsids that lived later in the Permian. ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Tappenosaurus」の詳細全文を読む
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