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鸭嘴龙形类

鸭嘴龙形类
化石时期:白垩纪早期到晚期
大鸭龙
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: 恐龙总目 Dinosauria
目: 鸟臀目 Ornithischia
亚目: 鸟脚亚目 Ornithopoda
演化支 禽龙类 Iguanodontia
演化支 橡树龙形态类 Dryomorpha
演化支 直拇指龙类 Ankylopollexia
演化支 硬棘龙类 Styracosterna
演化支 鸭嘴龙形类 Hadrosauriformes
Sereno, 1986

鸭嘴龙形类(Hadrosauriformes)是鸟臀目禽龙类的一个演化支,生存于白垩纪早期到晚期,分布于亚洲欧洲非洲美洲等地。

概述

鸭嘴龙形类是群衍化的鸟脚下目。鸭嘴龙形类的体型大,可采二足或四足方式行走,脚趾成蹄状。鸭嘴龙形类具有喙状嘴、多排的齿系、以及可做出研磨动作的颌部结构。

分类

鸭嘴龙形类是在1986年由保罗·塞里诺提出,并在1997年首次提出定义,范围是:贝尼萨尔禽龙沃克氏副栉龙的最近共同祖先,与其最近共同祖先的所有后代。这个范围包含禽龙科鸭嘴龙超科…等物种,跟禽龙超科的范围大致相同。

外部链接


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鸭嘴龙形类
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