貘頭獸下目

貘头兽下目
化石时期:268–260 Ma
二疊紀中期
麝足獸
科学分类 编辑
界: 动物界 Animalia
门: 脊索动物门 Chordata
纲: 合弓綱 Synapsida
演化支 獸孔類 Therapsida
演化支 真兽孔类 Eutherapsida
亚目: 恐头兽亚目 Dinocephalia
下目: 貘头兽下目 Tapinocephalia

貘頭獸下目(Tapinocephalia)是獸孔目恐頭獸亞目的主要演化支之一。與安蒂歐獸類冠鱷獸科不同,貘頭獸類的化石主要來自非洲,只有烏勒米龍獸來自俄羅斯。貘頭獸下目主要形成兩個演化支:戟頭獸偉鱷獸科、以及貘頭獸科。早期貘頭獸類有肉食性雜食性動物,例如偉鱷獸科。偉鱷獸科是有長尾巴的掠食動物,獵食其他草食性獸孔目動物。晚期的貘頭獸類是草食性動物。貘頭獸類有堅硬的頭部,可能用牠們的厚頭顱骨來以頭部互相碰撞。有些物種有角狀物,有些則沒有。最著名的貘頭獸類是麝足獸貘頭獸、以及偉鱷獸

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