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奧伊考角龍屬

奥伊考角龙属
化石时期:晚白堊紀桑托階
奥伊考角龍的想像圖
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
科: 弱角龙科 Bagaceratopidae
属: 奥伊考角龙属 Ajkaceratops
Ősi et al, 2010
模式種
科氏奥伊考角龍
Ajkaceratops kozmai

Ősi et al, 2010

奥伊考角龍屬(学名:Ajkaceratops)是角龍亞目恐龍的一屬,生活於上白堊纪歐洲,當时相當於西特提斯群島,距今约8600萬到8400萬年前。奥伊考角龍的最近親位於亞洲,牠們的祖先可能藉由多個群島而從亞洲遷徙而來。

敘述

奥伊考角龍化石發現於匈牙利西部包科尼山脈的Csehbánya組地層,地質年代为上白堊紀桑托階。在2010年,由Attila Ősi, 理察·巴特勒(Richard J. Butler)和大衛·威顯穆沛(David Weishampel)描述、命名。模式種科氏奥伊考角龍A. kozmai),屬名裡的Ajka是以匈牙利城市奥伊考為名,ceratops古希臘文ceratops)意為“有角的面孔”,是角龍類的常見字根;而種名是以當地的地質學家卡羅伊·科兹瑪(Károly Kozma)[1]

奥伊考角龍的正模標本(編號V2009.192.1),只包含少数頭顱骨碎片,其中包括喙骨,癒合的前上頜骨上頜骨碎片(嘴和下巴)。這些化石目前保存於布達佩斯匈牙利自然史博物館。雖然這些化石很零碎,但命名研究估計奥伊考角龍的身長約有1公尺(3.3英尺)[1]。其他化石材料則是四個前齒骨,這些化石被認為來自於較小的個體,跟正模標本不是來自於同一個體[1]

分類

奥伊考角龍的化石被認為類似於亞洲弱角龍科弱角龍巨嘴龍,这表示奥伊考角龙是親緣關係接近弱角龍科的角龍類恐龍,但比祖尼角龍角龍科更為原始[1]

古生物學

奥伊考角龍的化石被發現於匈牙利西部包科尼山脈的Csehbánya組地層,過去是個多個河流經過的氾濫平原,形成多黏土、砂礫的地層。奥伊考角龍與多種恐龍生存於相同群島:凹齒龍結節龍科獸腳類恐龍,以及真鱷類神龍翼龍科側頸龜亞目的Bothremydidae科、美洲蜥蜴科反鳥亞綱[2]

参考资料

  1. ^ 1.0 1.1 1.2 1.3 Ősi, Attila; Butler, R.J.; Weishampel, David B. A Late Cretaceous ceratopsian dinosaur from Europe with Asian affinities. Nature. 2010-05-27, 465: 466–468. doi:10.1038/nature09019. 
  2. ^ Ősi, Attila; Butler, R.J.; Weishampel, David B. A Late Cretaceous ceratopsian dinosaur from Europe with Asian affinities (supplementary data) (PDF). Nature. 2010-05-27, 465 (7297): 466–468 [2010-05-29]. PMID 20505726. doi:10.1038/nature09019. (原始内容存档 (PDF)于2016-03-05). 

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