XII.—The Postcranial Skeleton of Rhipidistian Fishes Excluding Eusthenopteron

S. M. Andrews, T. S. Westoll
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引用次数: 120

Abstract

Synopsis In a previous paper (Andrews and Westoll 1970) the postcranial skeleton of the best known rhipidistian, Eusthenopteron, was described, and its bearing on the origin of the tetrapod postcranial skeleton discussed. The postcranial remains of other Rhipidistia are now described as far as they are known, and comparisons are made with Eusthenopteron and other forms where relevant. Possible modes of function are considered in relation to the habitats in which these fishes may have lived. These studies have made it necessary to revise rhipidistian classification; the Family Rhizodontidae is re-defined and placed alone in a third Order of Rhipidistia (the Rhizodontida, alongside the better known Osteolepidida and Holoptychiida). Fresh insight has been gained into the following morphological problems: the composition of the osteolepid ring-like centrum, the origin of the tetrapod scapular blade and the diphyletic origin of the tetrapods.
十二。-不包括真鳍鱼的鲤科鱼类的颅后骨骼
在之前的一篇论文(Andrews and Westoll 1970)中,描述了最著名的鳍足动物真鳍龙的颅后骨骼,并讨论了它与四足动物颅后骨骼起源的关系。目前已知的其他里脊鱼的颅骨残骸已经被描述,并与真鳍龙和其他相关的形式进行了比较。可能的功能模式被考虑与这些鱼类可能生活的栖息地有关。这些研究表明,有必要修订海鞘分类;根齿虫科被重新定义,并被单独置于齿虫目的第三目(根齿虫目,与更知名的骨齿虫目和全齿虫目并列)。在以下形态学问题上获得了新的见解:骨脂环状椎体的组成,四足动物肩胛骨的起源和四足动物的双系起源。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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