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Extreme morphological divergence: phylogenetic position of a termite ectoparasite

机译：极端形态差异：白蚁外寄生虫的系统发育位置

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摘要

Species of Termitaria are lesion-forming ectoparasites occurring worldwide on a diverse group of termites. The reduced thallus consists of a basal cell layer from which haustorial cells penetrate the termite and a darkly pigmented sporodochium. One species, Termitaria snyderi, has been the subject of several morphological studies, but its phylogenetic position has remained enigmatic. Here we provide evidence of a close relationship between T. snyderi and the morphologically distinct ascomycetes, Kathistes analemmoides and K. calyculata, based on phylogenetic analysis of molecular characters derived from portions of the nuclear-encoded small-subunit ribosomal RNA gene (ssu rDNA) and supplemental evidence from the beta-tubulin gene. Trees were derived using parsimony and maximum-likelihood criteria. Bayesian analysis and parsimony bootstrap methods were used to assess support for the tree nodes.
机译：Termitaria的物种是形成病变的外寄生虫，遍布世界各地的各种白蚁群中。减少的丘疹由基底细胞层和深色的孢子囊组成，基底细胞层从该基底细胞层穿透白蚁。一个物种，即Sermitaria snyderi，已经成为一些形态学研究的主题，但其系统发育地位仍然是个谜。在这里，我们根据分子编码的小亚基核糖体RNA基因（ssu rDNA）部分分子特征的系统发育分析，提供了S. snyderi和形态独特的子囊，Kathistes analemmoides和k。calyculata之间密切关系的证据。以及来自β-微管蛋白基因的补充证据。树木是根据简约性和最大似然标准得出的。贝叶斯分析和简约引导方法用于评估对树节点的支持。

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