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首页> 外文期刊>Zoologica Scripta: An International Journal of Evolutionary Zoology >Monophyly, phylogeny and systematic position of the dagger Synechodontiformes (Chondrichthyes, Neoselachii)
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Monophyly, phylogeny and systematic position of the dagger Synechodontiformes (Chondrichthyes, Neoselachii)

机译：匕首齿形牙齿的单系，系统发育和系统位置（Chondrichthyes，Neoselachii）

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Klug, S. (2010). Monophyly, phylogeny and systematic position of the dagger Synechodontiformes (Chondrichthyes, Neoselachii). - Zoologica Scripta, 39, 37-49.Identifying the monophyly and systematic position of extinct sharks is one of the major challenges in reconstructing the phylogeny and evolutionary history, of sharks in general. Although great progress has been accomplished in the last few decades with regard to resolving the interrelationships of living sharks, a comprehensive phylogeny identifying the systematic position of Problematic or exclusively fossil taxa is still lacking. Fossil taxa traditionally assigned to synechodontiform sharks are very diverse with a fossil record extending back into the Palaeozoic hut with uncertain inter- and intrarelationships. Here, phylogenetic analyses using robust cladistic principles are presented for the first time to evaluate the monophyly of this group, their intrarelationships and their systematic position within Neoselachii. According to the results of this study, taxa assigned to this group form a monophyletic clade, the dagger Synechodontiformes. This group is sister to all living shirks and displays a suite of neoselachian characters. Consequently, the concept of neoselachian systematics needs to he enlarged to include this completely extinct group, which is considered to represent stein-group neoselachians. The origin of modern sharks can he traced back into the Late Permian (250 Mya) based on the fossil record of dagger Synechodontiformes. The systematic position of batoids remains contradictory, which relates to the use of different data (molecular vs. morphological) in phylogentic analyses.
机译：Klug，S.（2010年）。匕首的齿形，系统发育和系统位置（Chondrichthyes，Neoselachii）。 -Zoologica Scripta，39，37-49。识别灭绝的鲨鱼的单系和系统位置是重建鲨鱼系统发育和进化史的主要挑战之一。尽管在过去的几十年中，在解决活体鲨鱼之间的相互关系方面已取得了巨大进展，但仍缺乏一个全面的系统发育系统来确定有问题的或仅是化石类群的系统位置。传统上分配给棘突类鲨鱼的化石分类非常多样，化石记录可以追溯到古生代的小屋，而它们之间和内部的关系都不确定。在这里，首次提出了使用稳健的分类原则的系统发育分析，以评估该组的单方面性，它们的内部关系以及它们在新剑鱼中的系统位置。根据这项研究的结果，分配给该组的分类单元形成了单系进化枝，即匕首齿形。该小组是所有活泼推脱的姐妹，并展示了一组新塞拉奇人角色。因此，新塞拉奇主义系统学的概念需要扩大，以包括这个完全灭绝的群体，这被认为代表了斯坦群新塞拉奇主义者。他根据化石匕首的化石记录可以追溯到二叠纪晚期（250 Mya）。 batoids的系统位置仍然是矛盾的，这涉及在系统发育分析中使用不同数据（分子还是形态学）。

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