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Obturator externus groove : ウィキペディア英語版 | Obturator externus groove
The obturator externus groove is the groove on the posterior neck of the femur for the insertion of the obturator externus muscle, a muscle that is important during bipedal locomotion. This landmark is used as evidence of bipedal locomotion in the hominins. The fossil ''Orrorin tugenensis'' (6-7 mya) possesses the obturator externus groove, which suggests that it moved bipedally and could represent one of the earliest fossils with evidence of bipedal locomotion.
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「Obturator externus groove」の詳細全文を読む
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