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首页> 外文期刊>Acta Geologica Sinica - English Edition >A New Darwinopterid Pterosaur from the Middle Jurassic of Western Liaoning, Northeastern China and its Ecological Implications
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A New Darwinopterid Pterosaur from the Middle Jurassic of Western Liaoning, Northeastern China and its Ecological Implications

机译：辽西中侏罗世的一种新的翼龙翼龙及其生态学意义

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摘要

A new species of Darwinopterus, D. robustodens sp. nov. is described and named. Based on the new specimen, the diagnostic characters of Darwinopterus are amended and include: rostral dentition composed of well-spaced, spike-like teeth; the longest teeth are confined to the anterior half of the tooth row; tooth alveoli have raised margins; nasoantorbital fenestra confluent; inclined quadrate; elongate cervical vertebrae with low neural spine and reduced or absent ribs; long tail of more than 20 caudals partially enclosed by filiform extensions of the pre- and postzygapophyses; short metacarpus less than 60 per cent length of humerus, fifth toe with two elongate phalanges and curved second pedal phalanx of the fifth toe with the angle between the proximal and distal segments about 130 degrees. The complete specimen of the new pterosaur D. robustodens sp. nov. provides much more osteological information. The differences in tooth morphologies between Darwinopterus modularis and D. robustodens sp. nov. suggest that they filled different ecological niches. The hard integument-bearing Coleoptera may have been the main food source of Darwinopterus robustodens.
机译：Darwinopterus的一个新种，D.robustodens sp。十一月被描述和命名。在新的标本的基础上，Darwinopterus的诊断特征得到了修正，包括：由间隔良好的穗状牙齿组成的齿状牙列；最长的牙齿被限制在牙齿排的前半部分；牙齿肺泡边缘增加；鼻眶窗窗汇合处；方形颈椎长，神经脊低，肋骨减少或缺失；超过20个尾鳍的长尾巴，部分被前和后裂丝状的丝状延伸物包围；掌骨短，小于肱骨长度的60％，第五个脚趾有两个细长指骨，第五个脚趾的弯曲第二脚趾指骨，近端和远端之间的夹角约为130度。新翼龙D.robustodens sp。的完整标本。十一月提供了更多的骨科信息。 Darwinopterus moduleis和D.robustodens sp。之间牙齿形态的差异。十一月建议他们填补了不同的生态位。坚硬的被皮包裹的鞘翅目可能已经成为鲁氏达尔文蝇的主要食物来源。

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