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Revision of the basal sphenacodonts (Haptodontinae): systematic and evolutionary implications

基础蝶齿兽（Haptodontinae）的修订：系统和进化意义

基本信息

批准号：
204358781
负责人：
Professor Dr. Martin Sander
金额：
--
依托单位：
Abteilung Paläontologie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2012
资助国家：
德国
起止时间：
2011-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/204358781?language=en
关键词：
Revision basal sphenacodonts Haptodontinae systematic

项目摘要

Non-therapsid sphenacodonts dominate the early terrestrial tetrapod assemblages. This success began with the basal Sphenacodontia, referred to as haptodonts (previous subfamily Haptodontinae, type genus Haptodus). Their fossils are reported from the Late Pennsylvanian to the Early Permian from North America, England and continental Europe. Only few species have been described the modern way. Many descriptions date back between 1886 and 1925 (H. baylei, Palaeohatteria, Callibrachion, Datheosaurus, and Pantelosaurus) and therefore have to be revised based on new evidence. Furthermore, little is known about their evolution apart from the anatomical characters. This project aims to record the haptodont’s character diversity, leading to a taxonomical revision. Further, this is the basis for palaeobiological (including ontogenetical), ecological and phylogenetic conclusions. Using descriptive, cladistic and comparative zoological methods (anatomy, ontogeny, functional morphology), it will be the first complete study of haptodonts, important for understanding pre-mammal tetrapods. Of special interest is the revision of Palaeohatteria longicaudata Credner 1888, known from juvenile skeletons only, and its comparison to Pantelosaurus saxonicus von Huene 1925 from a nearby locality. As a result, the project will generate a complete characterization of the group, based on the study of all haptodont fossils, containing systematics, palaeobiology and their stratigrafic distribution.

非therapid楔齿占主导地位的早期陆生四足动物组合。这一成功开始于基底楔齿亚目，被称为haptodonts（以前的亚科Haptodontinae，模式属Haptodus）。它们的化石在晚宾夕法尼亚世至早二叠世在北美、英国和欧洲大陆均有报道。只有很少的物种被现代描述。许多描述可以追溯到1886年至1925年（H。Baylei，Palaeohatteria，Callibrachion，Dateosaurus，and Pantelosaurus），因此必须根据新的证据进行修订。此外，除了解剖特征外，对其进化知之甚少。这个项目的目的是记录haptodont的性格多样性，导致分类修订。此外，这也是古生物学（包括个体发生学）、生态学和系统发育学结论的基础。使用描述性，分支和比较动物学方法（解剖学，个体发育，功能形态学），这将是第一个完整的研究haptodonts，重要的理解哺乳动物前四足动物。特别值得注意的是仅从幼龙骨骼中发现的Palaeohatteria longicaudata Creenn 1888的修订，以及它与附近地区的Pantelosaurus saxonicus von Huene 1925的比较。因此，该项目将根据对所有触齿类化石的研究，包括系统学、古生物学及其地层分布，对该组进行完整的描述。