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迷雾龙属

迷雾龙属
化石时期:白垩纪后期,马斯特里赫特阶72–66 Ma
复原图
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: 兽脚亚目 Theropoda
演化支 阿贝力龙类 Abelisauria
科: 阿贝力龙科 Abelisauridae
属: 迷雾龙属 Niebla
Rolando et al., 2020
模式种
古迷雾龙
Niebla antiqua

Rolando et al., 2020

迷雾龙学名Niebla)是阿贝力龙科兽脚类恐龙的一个属,生存于晚白垩世坎帕阶马斯特里赫特阶[1])期间的阿根廷内格罗河省,仅含一个物种:古迷雾龙Niebla antiqua),所知于部分脱节骨骼。正模标本发现于艾伦组英语Allen Formation,代表一只成年个体。[2]

发现与命名

正模标本MPCN-PV-796发现于阿根廷内格罗河省罗卡将军市以南70千米(43英里)的马塔德罗山英语Matadero Hill附近。化石材料包括一个近乎完整的脑壳、零碎的颌骨牙齿、相对完整的肩胛鸟喙骨英语scapulocoracoid、背肋以及不完整的椎骨[2]

属名Niebla取自西班牙语单词“雾”,指化石挖掘过程中的雾天。种名antiqua取自拉丁语,意思是“古老的”。[2]

叙述

本属代表最衍生的阿贝力龙科之一,是种中型阿贝力龙科,尽管确切体型未知,但化石显示出的体型相对较小,特别是与有关恐龙如食肉牛龙相比。然而已知骨骼确实来自一只成年恐龙。根据现存遗骸及与其亲缘动物的比较,其身长大概为4—4.5米(13—15英尺)(基于阿克猎龙,另一属中型阿贝力龙科)。[3]

肩胛鸟喙骨英语scapulocoracoid食肉牛龙非常相似,有向后伸展的肩胛盂英语glenoid、背腹扩张且宽的喙突肩胛板英语coraco-scapular plate及非常窄而直的肩胛板英语scapular blade。这些特征与其他阿贝力龙科非常不同,可能表明肩带在这些南美兽脚亚目中有一种独特构造。[2]

古生态学

迷雾龙发现于阿根廷艾伦组,而翼龙类(风巨神翼龙)、兽脚类基尔梅龙波氏爪龙南方盗龙)、蜥脚类博纳巨龙柏利连尼龙洛卡龙)以及鸟脚类拉潘帕龙波拿巴龙)的化石也大量存在于此地层中。

参考资料

  1. ^ Armas, Paula; Sánchez, María Lidia. Hybrid coastal edges in the Neuquén Basin (Allen Formation, Upper Cretaceous, Argentina) (PDF). Andean Geology. 2015, 42: 97–113 [2018-10-02]. (原始内容 (PDF)存档于2020-10-19). 
  2. ^ 2.0 2.1 2.2 2.3 Aranciaga Rolando, Mauro; Cerroni, Mauricio A.; Garcia Marsà, Jordi A.; Agnolín, Federico l.; Motta, Matías J.; Rozadilla, Sebastián; Brisson Eglí, Federico; Novas, Fernando E. A new medium-sized abelisaurid (Theropoda, Dinosauria) from the late cretaceous (Maastrichtian) Allen Formation of Northern Patagonia, Argentina. Journal of South American Earth Sciences. 2020-10-14: 102915. ISSN 0895-9811. doi:10.1016/j.jsames.2020.102915 (英语). 
  3. ^ Grillo, O. N.; Delcourt, R. Allometry and body length of abelisauroid theropods: Pycnonemosaurus nevesi is the new king. Cretaceous Research. 2016, 69: 71–89. doi:10.1016/j.cretres.2016.09.001. 
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迷雾龙属
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