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Asioryctitheria : ウィキペディア英語版 | Asioryctitheria
Asioryctitheria ("asian digging beasts") is an extinct order of early eutherians. ==Skull structure== With the exception of ''Prokennalestes'', these advanced forms lacked a Meckelian groove. Furthermore, they were equipped with double-rooted canines, a lower premolar with a reduced or absent metaconid and a more elongated lower premolar than their predecessors. In addition, the entoconid and hypoconulid on the lower molars are untwinned, the entotympanic is non-existent, the alisphenoid is enlarged, a Vidian foramen is present as well as a promontorium linked to the paroccipital process via the crista interfenestralis.
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「Asioryctitheria」の詳細全文を読む
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