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角鼻龍類

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角鼻龍類
化石时期:侏儸紀早期到白堊紀晚期,198–66 Ma
科学分类 编辑
界: 动物界 Animalia
门: 脊索动物门 Chordata
纲: 蜥形纲 Sauropsida
总目: 恐龍總目 Dinosauria
目: 蜥臀目 Saurischia
亚目: 獸腳亞目 Theropoda
演化支 新獸腳類 Neotheropoda
演化支 鳥吻類 Averostra
演化支 角鼻龙类 Ceratosauria
Marsh,1884
演化支

角鼻龍類(Ceratosauria)是一群獸腳亞目恐龍,被定義為:在獸腳亞目之中,比鳥類更接近角鼻龍的所有物種。目前對於角鼻龍類的鑑別特徵、物種列表,並沒有一致的共識。根據其中一個理論,角鼻龍下目包含角鼻龍輕巧龍阿貝力龍等生存於晚侏羅紀到晚白堊紀的獸腳亞目恐龍,主要發現於南半球。角鼻龍類的分布廣泛,而且是恐龍時代早期的主要掠食性恐龍,然而當堅尾龍類出現時,牠們逐漸在北方各大陸消失。

傳統上,角鼻龍類不僅包含以上恐龍,還加上了生存於晚三疊紀到早侏儸紀腔骨龍超科腔骨龍雙脊龍);這使得腔骨龍超科成為角鼻龍類的較早期分支。然而,最近的研究顯示腔骨龍超科並非角鼻龍下目的一個演化支,應該獨立於角鼻龍類。該研究也發現,角鼻龍類是堅尾龍類的姊妹分類單元

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角鼻龍類
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