鴨嘴龍形類

鴨嘴龍形類
化石时期:白堊紀早期到晚期
大鴨龍
无效状况
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: 鸟臀目 Ornithischia
亚目: 鸟脚亚目 Ornithopoda
演化支 禽龍類 Iguanodontia
演化支 橡树龙形态类 Dryomorpha
演化支 直拇指龍類 Ankylopollexia
演化支 硬棘龍類 Styracosterna
演化支 鴨嘴龍形類 Hadrosauriformes
Sereno, 1986

鴨嘴龍形類(Hadrosauriformes)是鳥臀目禽龍類的一個演化支,生存於白堊紀早期到晚期,分佈於亞洲歐洲非洲美洲等地。

概述

鴨嘴龍形類是群衍化的鳥腳下目。鴨嘴龍形類的體型大,可採二足或四足方式行走,腳趾成蹄狀。鴨嘴龍形類具有喙狀嘴、多排的齒系、以及可做出研磨動作的頜部結構。

分類

鴨嘴龍形類是在1986年由保羅·塞里諾提出,並在1997年首次提出定義,範圍是:貝尼薩爾禽龍沃克氏副櫛龍的最近共同祖先,與其最近共同祖先的所有後代。這個範圍包含禽龍科鴨嘴龍超科…等物種,跟禽龍超科的範圍大致相同。

外部連結


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