The taxonomy and anatomy of rauisuchian archosaurs from the Late Triassic of Germany and Poland
The taxonomy and anatomy of rauisuchian archosaurs from the Late Triassic of Germany and Poland
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DOI：
10.4202/app.2008.0065
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发表时间：
2009-06-01
影响因子：
1.8
通讯作者：
Niedzwiedzki, Grzegorz
中科院分区：
文献类型：
--
作者：
Brusatte, Stephen L.;Butler, Richard J.;Niedzwiedzki, Grzegorz
德国晚三叠世始祖龙Teratosaurus suevicus是一个历史上重要的分类单元，是第一个被描述的rauisuchian。不幸的是，正模标本是一个单一的元素，一个上颌骨，这是保存不良和不完整的。我们重新描述这个上颌骨，并确定一个潜在的自形。这个不完整的模式标本使试图将更多的材料归于这个分类单元的尝试变得复杂，并且其他来自德国的Mittlerer Stubensandstein的无关联的主龙和劳伊苏奇亚标本不能归于T.苏维库斯的任何程度的信心。地层年龄较大的T.产于波兰卡尼阶晚期的silesiacus，其标本保存得更为完整。对T. suevicus和T. silesiacus揭示了这两个是不同的分类群，与最近的建议相反，但它们也没有任何共同的突触形态或相对于Postosuchus kirkpatricki和其他rauisuchians的独特特征组合。因此，波兰的材料必须转移到一个新的属，Polonosuchus gen. nov. Polonosuchus和Teratosaurus都与Postosuchus kirkpatricki非常相似，这三个分类群可能密切相关。
The German Late Triassic archosaur Teratosaurus suevicus is a historically important taxon, being the first described rauisuchian. Unfortunately the holotype is a single element, a maxilla, which is poorly preserved and incomplete. We redescribe this maxilla and identify a single potential autapomorphy. The fragmentary type specimen complicates attempts to refer additional material to this taxon, and other unassociated archosaur and rauisuchian specimens from the Mittlerer Stubensandstein of Germany cannot be referred to T. suevicus with any degree of confidence. The stratigraphically older T. silesiacus, from the upper Carnian of Poland, is represented by a much more complete and better preserved specimen. Comparison of the maxillae of T. suevicus and T. silesiacus reveals that the two are distinct taxa, contra recent suggestions, but also that they do not share any synapomorphies or a unique combination of characters relative to Postosuchus kirkpatricki and other rauisuchians. Thus, the Polish material Must be transferred to a new genus, Polonosuchus gen. nov. Both Polonosuchus and Teratosaurus are very similar to Postosuchus kirkpatricki, and the three taxa arc likely closely related.