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Caseidae Caseidae is an extinct family of synapsids from the Carboniferous and Permian period. It was a widespread group of very primitive herbivorous synapsids, which appeared during the late Carboniferous and persisted until the late middle Permian. ==Characteristics== All caseids, whether modest or enormous, are characterized by small cervical vertebrae, bulky, barrel-shaped bodies and relatively massive limbs. Although ranging in size from 1 to 5½ meters (3–18 feet) in body length, caseids were surprisingly conservative in their skeletal anatomy and body proportions. All were large animals with small heads and barrel-like bodies. Some, like ''Angelosaurus'' and ''Cotylorhynchus'', which exceeded 4 meters long and were the largest of the pelycosaurs, seemed to have played the same ecological role during the later part of the early Permian that the pareiasaurs and herbivorous dinocephalians did during the Middle and Late Permian.
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「Caseidae」の詳細全文を読む
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