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Thrapsid sphenacodonts主导着早期的陆地四足动物组合。这一成功始于巴萨·斯图纳科多孔孔（Bassal sphenacodontia），称为haptodonts（先前的亚家族haptodontinae，type haptodus属）。据报道，他们的化石是从宾夕法尼亚州已故的北美，英格兰和继续欧洲的早期二叠纪的。只有很少的物种被描述为现代方法。许多描述可以追溯到1886年至1925年（H. Baylei，Palaeohatteria，Callibrachion，Datheosaurus和Pantelosaurus），因此必须根据新证据进行修订。此外，除了解剖特征外，对它们的进化知之甚少。该项目旨在记录HAPODONT的性格多样性，从而导致分类学修订。此外，这是古生物学（包括个体发育），生态学和系统发育结论的基础。使用描述性，clad和比较动物学方法（解剖学，个体发育，功能形态），它将是首次对触觉的完整研究，对于理解哺乳动物前四足动物而言很重要。特别感兴趣的是1888年的Palaeohatteria Longicaudata Credner的修订，仅从少年骨骼中闻名，以及与Pantelosaurus Saxonicus von Huene 1925年的比较。结果，该项目将基于对所有触觉化石的研究，其中包含系统学，古生物学及其地层分布的所有效果。