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The phylogeny and paleobiology of the early Reptilia

早期爬行动物的系统发育和古生物学

基本信息

批准号：
5400650
负责人：
Professor Dr. Johannes Müller
金额：
--
依托单位：
Museum für Naturkunde - Leibniz-Institut für Evolutions- und Biodiversitätsforschung (MfN)
依托单位国家：
德国
项目类别：
Independent Junior Research Groups
财政年份：
2003
资助国家：
德国
起止时间：
2002-12-31 至 2010-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/5400650?language=en
关键词：
phylogeny paleobiology early Reptilia

项目摘要

The origin and early evolution of the Eureptilia, a major amniote clade comprising popular animals like snakes, dinosaurs, and birds, is still not satisfactorily understood. Basal eureptiles are currently subdivided into captorhinids and protorothyridids, but the monophyly of the two is not clear, and maybe some taxa are more closely related to the better-known diapsid reptiles. The investigation of newly recovered specimens of the hitherto incompletely known taxon Thuringgothyris from the Lower Permian of Thuringia, whose anatomy appears "intermediate" between captorhinids and protorothyridids, the revision of closely related taxa from North America including studies of the postnatal ontogeny, as well as a phylogenetic analysis of early eureptiles and related taxa will examine the following questions: 1) Are the earliest eureptiles monophyletic or rather a grade leading to the diapsid reptiles? 2) Are ontogenetic trajectories recognizable and useful for an understanding of the biology of early amniotes/eureptiles? 3) Is it possible to develop an explanatory model for the morphological transition leading to the amniote/eureptile anatomy? The results will then be used for fucture investigations, including studies on extant amniotes.

真爬行动物是羊膜动物的一个主要分支，包括蛇、恐龙和鸟类等常见动物，其起源和早期进化至今仍未得到令人满意的了解。基底真爬行动物目前被细分为captorhinids和protorothyriids，但两者的单系性尚不清楚，可能有些分类群与较知名的diapsid爬行动物关系更近。图林根下二叠世新近发现的尚不完全已知的图林哥特瑞斯（Thuringgothyris）分类群的标本，其解剖学表现为“介于”captorhinids和protrothyriids之间，对北美近缘分类群的修正，包括出生后个体发育的研究，以及早期真爬行动物及其相关分类群的系统发育分析，将探讨以下问题：1)最早的真爬行动物是单系的，还是一个通向双壳类爬行动物的等级？2)个体发生轨迹是否可识别并有助于理解早期羊膜动物/欧洲爬行动物的生物学？3)是否有可能为导致羊膜/准爬行动物解剖的形态转变建立一个解释模型？这些结果将用于未来的调查，包括对现存羊膜动物的研究。