ABSTRACT

Phoebodont-like teeth originally described as Phoebodus brodiei and Phoebodus keuperinus from the Upper Triassic of England and Germany, respectively, are attributed to a new genus Keuperodus of the family Jalodontidae. The characteristic features of all jalodontid genera are re-examined leading to the conclusion that this group formed a separate, distinct chondrichthyan evolutionary line for which a new order, the Jalodontiformes is established. The jalodontid dentition evolved from a homodont-like type to one which was markedly heterodont.

中文翻译：

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来自欧洲三叠纪最年轻的jalodontid鲨鱼和Jalodontidae的修订版

摘要

Phoebodont-like 牙齿最初被描述为Phoebodus brodiei和Phoebodus keuperinus，分别来自英国和德国的上三叠统，属于Jalodontidae科的一个新属Keuperodus。重新检查了所有jalodontid 属的特征，得出的结论是，该组形成了一个单独的、独特的软骨鱼类进化线，为此建立了一个新的目，即Jalodontiformes。jalodontid 牙列从类homodont 类型演变为一个明显的heterodont 类型。