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首页> 外文期刊>Zoologica Scripta: An International Journal of Evolutionary Zoology >Molecules or morphogenesis: how to determine the phylogenetic assignment of Paratetrahymena (Protista, Ciliophora, Oligohymenophorea)?
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Molecules or morphogenesis: how to determine the phylogenetic assignment of Paratetrahymena (Protista, Ciliophora, Oligohymenophorea)?

机译：分子或形态发生：如何确定副猪膜虫（Protista，Ciliophora，Oligohymenophorea）的系统发育分配？

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摘要

The phylogeny of the genus Paratetrahymena was studied based on molecular, morphological and morphogenetic evidence of a poorly known species, P. wassi (The Virginia Journal of Science, 14, 1963, 126). Phylogenetic trees constructed with sequences of small subunit rRNA (SSU-rRNA) demonstrate that P. wassi, together with another morphotype of this genus and Cardiostomatella vermiforme, always form a distinct sister group to the typical scuticociliates and are clearly isolated from the Hymenostomatia and Peritrichia clades. Its stomatogenesis, however, is like that of hymenostomes in that the parental oral structure is completely inherited by the proter and the new oral anlagen of the opisthe derives from the right postoral kinety., thus supporting a close relationship with the Hymenostomatia. The only conclusions that can be reached from molecular, morphological and morphogenetic information are that (1) Paratetrahymena seems to belong to the order Loxocephalida and (2) clarifying the classification, phylogenetic position and composition of the Loxocephalida still depends on obtaining a much more inclusive set of all kinds of data. As a further contribution, a new diagnosis and morphological redescription of Paratetrahymena and P. wassi are provided based on new data. It is interesting that molecular evidence also suggests that the morphologically unique Urocentrum, which has been classified as a peniculid for a long time, is closely related to a putative loxocephalid, Dexiotrichides pangi, and that both might occupy a phylogenetic position distant from the taxa to which they are assigned at present.
机译：根据一种鲜为人知的物种P. wassi的分子，形态和形态发生证据，研究了Paratetrahymenmena属的系统发育（弗吉尼亚科学杂志，14，1963年，126）。用小亚基rRNA（SSU-rRNA）序列构建的系统发育树表明，P。wassi以及该属的另一种形态型和Card形心虫，总是形成典型的cut形虫的一个独特的姐妹群，并且明显地与处女膜毛虫和腹膜炎分离进化枝。然而，它的气孔形成就像是处女膜组，因为亲本的口腔结构完全被前列腺癌所继承，而新的输卵管口服胶原蛋白来源于正确的口腔运动，从而支持与处女膜的紧密联系。从分子，形态学和形态发生学信息可以得出的唯一结论是：（1）副四膜虫似乎属于狐头目目;（2）澄清狐头目的分类，系统发生位置和组成仍然取决于获得更具包容性的内容。各种数据集。作为进一步的贡献，在新数据的基础上，提供了对伞形假单胞菌和芥子型假单胞菌的新诊断和形态学重新描述。有趣的是，分子证据还表明，长期以来被归类为青霉的形态独特的泌尿中心体与推定的头型头目Dexiotrichides pangi密切相关，并且两者都可能占据从类群到植物的远缘。目前已分配给他们。

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