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乔冈龙属

乔冈龙属
化石时期:森诺曼阶
~97–94 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: 恐龙总目 Dinosauria
目: 蜥臀目 Saurischia
亚目: 蜥脚形亚目 Sauropodomorpha
下目: 蜥脚下目 Sauropoda
演化支 泰坦巨龙类 Titanosauria
属: 乔冈龙属 Choconsaurus
Simón et al., 2017
模式种
贝利威利斯乔冈龙
Choconsaurus baileywillisi

Simón et al., 2017

乔冈龙属名Choconsaurus)是植食性蜥脚类恐龙灭绝的一个,属于巨龙形类,生存于白垩纪末期的阿根廷[1]

化石发现于内乌肯省埃尔乔冈村英语Villa El Chocón,据报道在那里发现了蜥脚类的遗骸。2017年,模式种威氏乔冈龙Choconsaurus baileywillisi)由伊迪斯·西蒙(Edith Simón)、莱昂纳多·萨尔加多(Leonardo Salgado)和豪赫·奥兰多·卡尔沃(Jorge Orlando Calvo)等人正式命名、叙述。属名取自化石发现地埃尔乔冈村,种名致敬美国地质学家贝利·威利斯英语Bailey Willis(Bailey Willis),他在1910至1914年间叙述了该地区的地层[1]

正模标本发现于森诺曼阶晚期的乌因库尔组英语Huincul Formation,由缺少颅骨的部分骨骼组成,包括颈椎、背椎、尾椎和部分四肢骨骼,是2017年发现的最完整的基干泰坦巨龙类骨骼。[1]

叙述者确定了一些鉴别特征。在颈椎上,后关节面上缘几乎不发育。在第一节椎骨上,下椎弓突两侧皆有非常大的次级突起。椎体和后段椎骨有一个额外的嵴,位于从外侧突出延伸到椎体的后嵴和平行于主嵴的次嵴之间。前段尾椎的后下椎弓突次级关节有一个突出物。[1]

乔冈龙在其2017年的叙述文章中被归入基干泰坦巨龙类演化支,位于真泰坦巨龙类之外。[1]

参见

[编辑]

参考资料

[编辑]
  1. ^ 1.0 1.1 1.2 1.3 1.4 Simón, Edith; Salgado, Leonardo; Calvo, Jorge O. A new titanosaur sauropod from the Upper Cretaceous of Patagonia, Neuquén Province, Argentina. Ameghiniana. 2017, 55: 1–29 [2020-03-16]. doi:10.5710/AMGH.01.08.2017.3051. (原始内容存档于2019-12-30). 
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乔冈龙属
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