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首页> 外文期刊>Journal of Natural History: An International Journal of Systematics and General Biology >A cladistic analysis of Platythelphusa A. Milne-Edwards,1887, from Lake Tanganyika, East Africa (Decapoda: Potamoidea: Platythelphusidae) with comments on the phylogenetic position of the group
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A cladistic analysis of Platythelphusa A. Milne-Edwards,1887, from Lake Tanganyika, East Africa (Decapoda: Potamoidea: Platythelphusidae) with comments on the phylogenetic position of the group

机译：对东非坦Tang尼喀湖的鸭嘴兽A.Milne-Edwards，1887年进行的分类分析（十足目：波塔莫地亚：鸭嘴兽科），并对该群体的系统发育状况进行了评论

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摘要

The phylogenetic relationships of the freshwater crab genus Platythelphusa were investigated by means of a cladistic analysis using morphological characters. The platythelphusa were found to be a monophyletic assemblage, this finding supports the recognition of the family Platythelphusidae. Platythelphusa is endemic to Lake Tanganyika, East Afrca, and some of its species bear a striking resemblance to certain marine crabs (grapsids). The study does not support the idea that the Platythelphusidae emerged from a relict population of a grapsid or grapsid-like taxon: the evidence supports an hypothesis for the evolution of this family from freshwater crab ancestors. Parsimony considerations position the freshwater crab family Deckeniidae as the sister group of the platythelphusids. In addition, the Palaeotropical freshwater crabs appear to constitute a monophyletic group.
机译：利用形态学特征进行类群分析，研究了淡水蟹属鸭嘴兽属的系统发育关系。鸭嘴兽被发现是单系组合，这一发现支持对鸭嘴兽科的认识。 Platythelphusa是东非洲地区坦Tang尼喀湖的特有种，其某些物种与某些海洋蟹（grapsids）具有惊人的相似之处。这项研究不支持鸭嘴兽科是从一种psi类或类gra类的分类单元中遗留下来的观点：证据支持这一家族从淡水蟹祖先进化的假说。简约的考虑将淡水蟹科Deckeniidae定位为鸭嘴兽的姊妹群。此外，古热带淡水蟹似乎构成了单亲类群。

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