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首页> 外文期刊>Neues Jahrbuch fur Geologie und Palaontologie. Abhandlungen >Taxonomy, morphology and phylogeny of Lower Jurassic teudopseid coleoids (Cephalopoda)
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Taxonomy, morphology and phylogeny of Lower Jurassic teudopseid coleoids (Cephalopoda)

机译：下侏罗世的拟假胶体类脂（Cephalopoda）的分类学，形态学和系统发育

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摘要

Previously, the number of teudopseid coleoids that roamed the European seas during Early Toarcian times has been unclear. Re-study of a large set of teudopseid gladii from different European localities show that three species existed at that time: Teudopsis bunelii EUDES-DES-LONGCHAMPS, 1835, Teudopsis bollensis VOLTZ, 1836 and Teudopsis subcostata (MONSTER, 1843). In the course of taxonomic treatments, the three taxa are re-described, a lectotype is designated for the first one, and neotypes are designated for the latter two. The most striking difference concerns the anterior shape. It is rachis-like in Teudopsis bunelii, triangular in Teudopsis bollensis, and lanceolate in Teudopsis subcostata. Although an out-group comparison is problematic, the pronounced dorsal keel is an unequivocal autapomorphy of the Teudopseina. The gladius of Teudopsis subcostata seems to possess the most ancient character combination. Phylogenetically, the trachyteuthidid lineage might have been originated from Teudopsis subcostata, whereas the palaeololiginid/muensterellid lineage evolved from Teudopsis bunelii. A close phylogenetic relationship between teudopseids and modern decabrachian as sometimes proposed is not supported.
机译：以前，在早期Toarcian时代漫游于欧洲海域的拟南芥胶质体数量尚不清楚。对来自欧洲不同地区的一组大型拟南芥进行的重新研究表明，当时存在三种：Teudopsis bunelii EUDES-DES-LONGCHAMPS（1835年），Teudopsis bollensis VOLTZ（1836年）和Teudopsis subcostata（MONSTER，1843年）。在分类学处理过程中，重新描述了三个分类单元，第一个选择了一个选型，后两个选择了新型。最显着的差异涉及前部形状。它在Teudopsis bunelii中呈Rachis状，在Teudopsis bollensis中呈三角形，在Teudopsis subcostata中为披针形。尽管小组外比较是有问题的，但明显的背龙骨是Teudopseina的明确明确的亚同形。拟南芥肋前缘的剑角虫似乎拥有最古老的角色组合。从系统发育的角度看，准线虫谱系可能起源于拟南芥（Teudopsis subcostata），而古鳞茎/粘粒虫谱系则起源于布氏拟南芥（Teudopsis bunelii）。不支持有时提出的拟南芥和现代十足动物之间的亲密的系统发育关系。

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