Evidence item

IT之家 reports replacement teeth from different generations across incisors, canines, premolars and molars in the specimen. ARCHAEOLOGICAL

Authenticity UNVERIFIED · extraction UNVERIFIED · independence group none (unreviewed) · created seq 23996

Source: 中外学者确认最早半水生记录：1.25 亿年前哺乳动物就会游泳 · locator {} · excerpt hash sha256:da3df527db00c269c8a98b46c6bb0bdde30959a9fa57db18f366864a6c3e0e47

此次发现的板尾董尖齿兽标本罕见保存了门齿、犬齿、前臼齿、臼齿在不同世代的替换齿，是迄今发现的首个在哺乳动物四类牙齿中均可发生多次替换的哺乳动物。