Evolution and adaptive radiation of dog-fish sharks (Chondrichthyes, Squaliformes)

角鲨（软骨鱼目、角鲨目）的进化和适应性辐射

• 批准号: 31701581
• 负责人: Professor Dr. Jürgen Kriwet
• 金额: --
• 依托单位: Institut für Paläontologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/31701581?language=en
• 关键词: Evolution; adaptive; radiation; dog; fish

The interrelationships and evolution of squaliform sharks are controversially discussed and the processes underlying their radiation in the deep-sea are unknown. Squaliform sharks are wide-spread and constitute a monophyletic group with a fossil record ranging back into the Early Cretaceous. Their fossil record consists almost completely of isolated teeth, only few skeletal remains are known from the Lebanese Late Cretaceous. In this study, the phylogeny of extant and fossil squaliforms is re-examined for the first time using a combination of dental, meristic, and molecular data. Although the separate data sets display high potential for reconstructing phylogenetic relationships within squaliforms, no detailed study concerning the potential of individual data sets in combination has been carried out so far. The radiation of selected speciose groups (e.g., Etmopteridae, Squalidae) will be analysed with modern techniques for gaining better insights into the timing and pattern of processes underlying adaptation and speciation events and to develop general models with relevance to other groups e.g., deep-water carcharhiniform sharks.

方鲨的相互关系和进化受到了争议的讨论，它们在深海中的辐射过程尚不清楚。剑齿鲨分布广泛，是一个单系类群，其化石记录可以追溯到早白垩世。他们的化石记录几乎完全是孤立的牙齿，只有很少的骨骼遗骸是已知的来自黎巴嫩晚白垩世。在这项研究中，利用牙齿、分生组织和分子数据的组合，首次重新研究了现存的和化石的方形动物的系统发育。虽然单独的数据集显示出在方型内重建系统发育关系的很大潜力，但迄今为止还没有对单个数据集的组合潜力进行详细研究。将用现代技术分析选定的物种组(如角鲨科、角鲨科)的辐射，以便更好地洞察适应和物种形成事件的基本过程的时间和模式，并开发与其他组相关的一般模型，如深水角鲨。

项目成果

Cryptic diversity and species assignment of large lantern sharks of the Etmopterus spinax clade from the Southern Hemisphere (Squaliformes, Etmopteridae)

• DOI: 10.1111/j.1463-6409.2010.00455.x
• 发表时间: 2011-01
• 期刊: Zoologica Scripta
• 影响因子: 2.5
• 作者: N. Straube;J. Kriwet;U. Schliewen