期刊文献

A reassessment of the enigmatic diapsid Paliguana whitei and the early history of Lepidosauromorpha 收藏

重新评估神秘的Diapsid Paliguana Whitei和Lepidosauromorpha的早期历史

原文求助发布源

作者

David P. Ford[1];Susan E. Evans[2];Jonah N. Choiniere[3];Vincent Fernandez[4];Roger B. J. Benson[5];David P. Ford[1];Susan E. Evans[2];Jonah N. Choiniere[3];Vincent Fernandez[4];Roger B. J. Benson[5]

作者单位

[1]Evolutionary Studies Institute, University of Witwatersrand, 1 Jan Smuts Avenue, Johannesburg 2000, South Africa;[2]Research Department of Cell and Developmental Biology, University College London, London WC1E 6BT, UK Contribution: Conceptualization, Data curation, Methodology, Writing-review & editing;[3]Evolutionary Studies Institute, University of Witwatersrand, 1 Jan Smuts Avenue, Johannesburg 2000, South Africa Contribution: Conceptualization, Funding acquisition, Investigation, Resources, Writing-review & editing;[4]Core Research Laboratories, The Natural History Museum, London, UK ESRF, The European Synchrotron, Grenoble, France Contribution: Resources, Software, Visualization, Writing-review & editing;[5]Department of Earth Sciences, University of Oxford, South Parks Road, Oxford OXI 3AN, UK Contribution: Conceptualization, Investigation, Methodology, Resources, Writing-original draft, Writing-review & editing

关键词

lepidosaur; phylogeny; synchrotron; Triassic; anatomy; Lepidosauromorpha

关键词译文

Lepidosaur;系统发生;同步rotron;三叠纪;解剖学;Lepidosauromorpha

发布日期

25 August 2021

DOI

10.1098/rspb.2021.1084

来源信息

Proceedings of the Royal Society of London B: Biological Sciences ISSN：0962-8452, 2021年, 288卷, 1957期

摘要

Lepidosaurs include lizards, snakes, amphisbaenians and the tuatara, comprising a highly speciose evolutionary radiation with widely varying anatomical traits. Their stem-lineage originated by the late middle Permian 259 million years ago, but its early fossil record is poorly documented, obscuring the origins of key anatomical and functional traits of the group. Paliguana whitei, from the Early Triassic of South Africa, is an enigmatic fossil species with the potential to provide information on this. However, its anatomy and phylogenetic affinities remain highly uncertain, and have been debated since its discovery more than 100 years ago. We present microtomographic three-dimensional imaging of the cranial anatomy of P. whitei that clarifies these uncertainties, providing strong evidence for lepidosauromorph affinities based on the structure of the temporal region and the implantation of marginal dentition. Phylogenetic analysis including these new data recovers Paliguana as the earliest known stem-lepidosaur, within a long-lived group of early diverging lepidosauromorphs that persisted to at least the Middle Jurassic. Our results provide insights into cranial evolution on the lepidosaur stem-lineage, confirming that characteristics of pleurodont dental implantation evolved early on the lepidosaur stem-lineage. By contrast, key functional traits related to hearing (quadrate conch) and feeding (streptostyly) evolved later in the lepidosaur crown-group.

摘要译文

Lepidosaurs包括蜥蜴，蛇，朝鲜巴斯和图帕拉，包括具有广泛变化的解剖性状的高度种类的进化辐射。他们的茎谱系起源于二叠代二倍半年前，但其早期化石记录记录尚未记录，掩盖了本集团关键解剖和功能性状的起源。 Paliguana Whitei从南非的早期三叠系，是一种有可能提供信息的神秘化石物种。然而，其解剖和系统发育亲和力仍然非常不确定，并且自于100多年前的发现以来已经争论。我们呈现了P. Whitei的颅骨解剖学的微调三维成像，阐明了这些不确定性，为基于时间区域的结构和边际牙列的植入提供了强有力的血糖孢瓜亲密性证据。系统发育分析包括这些新数据作为最早的患有最早的已知的茎叶龙，在早期分歧的长期分歧的尿囊孢瓜氏症中，持续到中间侏罗纪的长期分歧。我们的结果提供了对羊毛龙血栓血统血统进化的洞察力，证实了牙龈牙龙血栓谱系早期演化的牙龈牙植入的特征。相比之下，与听力（Quadrate CONCH）相关的关键功能性状和喂养（Strectostyly）以后在Lepidosaur Crown-Group中逐渐发展。

David P. Ford[1];Susan E. Evans[2];Jonah N. Choiniere[3];Vincent Fernandez[4];Roger B. J. Benson[5];David P. Ford[1];Susan E. Evans[2];Jonah N. Choiniere[3];Vincent Fernandez[4];Roger B. J. Benson[5]. A reassessment of the enigmatic diapsid Paliguana whitei and the early history of Lepidosauromorpha[J]. Proceedings of the Royal Society of London B: Biological Sciences, 2021,288(1957)