Archosaur remains from the Otter Sandstone Formation (Middle Triassic, late Anisian) of Devon, southern UK
Archosaur remains from the Otter Sandstone Formation (Middle Triassic, late Anisian) of Devon, southern UK
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DOI：
10.1016/j.pgeola.2010.08.004
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发表时间：
2011-01-01
影响因子：
1.2
通讯作者：
Benton, Michael J.
中科院分区：
文献类型：
--
作者：
Benton, Michael J.
来自德文郡中三叠世（阿尼西亚）水獭砂岩组的一个新的颌骨证实了一个衍生的祖龙（阿鲁奇亚）的存在。许多孤立的牙齿和椎骨已经表明水獭砂岩组中存在主龙，推测它们是temnospondyls，procolophonids和rhynchosaurs动物群的掠食者，但新化石是第一个显示出一些诊断特征的化石。其他与颌骨在同一区块的元素，但不一定来自同一动物，包括一个可能的头骨或骨盆骨，一个细长的长骨，一颗小牙齿（可能是prolacertiform），以及两个推测的祖龙皮盾。另外还有一个盾形骨，以及可能是耻骨的远端，可能来自一个大型的波波龙类主龙，如阿尼西亚时代的布罗姆格罗夫龙或亚利桑那龙。下颚和耻骨代表了非常不同大小的动物，估计体长分别为0.8米和3米。(C)2010年地质学家协会。由爱思唯尔有限公司出版。保留所有权利。
A new jaw from the Middle Triassic (Anisian) Otter Sandstone Formation of Devon confirms the existence of a derived archosaur (avesuchian). Numerous isolated teeth and vertebrae had already suggested the presence of archosaurs in the Otter Sandstone Formation, presumed predators on the fauna of temnospondyls, procolophonids, and rhynchosaurs, but the new fossil is the first to show some diagnostic characters. Other elements in the same block as the jaw, but not necessarily from the same animal, include a possible skull or pelvic bone, a slender long bone, a small tooth (perhaps prolacertiform), and two presumed archosaur dermal scutes. An additional scute is present, as well as the probable distal end of a pubis, perhaps from a large poposauroid archosaur like the Anisian-age Bromsgroveia or Arizonasaurus. The jaw and pubis represent animals of very different sizes, some 0.8 m and 3 m long in estimated body length respectively. (C) 2010 The Geologists' Association. Published by Elsevier Ltd. All rights reserved.