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首页> 外文期刊>Mycologia >The ajellomycetaceae, a new fami of vertebrate-associated Onygenales
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The ajellomycetaceae, a new fami of vertebrate-associated Onygenales

机译：竹节菌科，与脊椎动物相关的Onygenales的新家族

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摘要

Phylogenies inferred from the analysis of DNA sequence data have shown that the Onygenales contains clades that do not correspond with previously described families. One lineage identified in recent molecular phylogenetic studies includes the dimorphic pathogens belonging to the genera Ajellomyces, Emmonsia and Paracoccidioides. To evaluate the degree of support for this lineage and determine whether it includes additional taxa, we examined relationships among the members of this clade and selected saprobic onygenalean taxa based on maximum-parsimony analyses of partial nuclear large RNA subunit (LSU) and internal transcribed spacer (ITS) sequences. A clade distinct from the Onygenaceae was found to encompass Ajellomyces (including the anamorph genera Blastomyces, Emmonsia and Histoplasma) and Paracoccidioides brasiliensis. The members of this lineage are saprobic and pathogenic vertebrate-associated taxa distinguished by their globose ascomata with coiled appendages, muricate globose or oblate ascospores, and lack of keratinolytic activity. Anamorphs are solitary aleurioconidia or irregular alternate arthroconidia. Based on molecular data and on morphological and physiological similarities among these taxa, we propose the new family, Ajellomycetaceae.
机译：根据对DNA序列数据的分析推断出的系统发育史表明，Onygenales含有与先前描述的家族不符的进化枝。在最近的分子系统发育研究中鉴定出的一种谱系包括属于阿美氏菌属，口疮属和副球菌属的双态病原体。为了评估对该谱系的支持程度并确定其是否包括其他类群，我们根据部分核大RNA亚基（LSU）和内部转录间隔子的最大简约分析，检查了该进化枝成员与选择的腐生on草a类群之间的关系。 （ITS）序列。发现一个不同于Onygenaceae的进化枝包含Ajellomyces（包括变形菌属Blastomyces，Emmonsia和Histoplasma）和Paracoccidioides brasiliensis。该血统的成员是腐生的和致病性的脊椎动物相关类群，其特征是它们的球状附生物带有盘绕的附肢，具球状或扁圆形的子囊状孢子，并且缺乏角蛋白分解活性。无性型是单生孢子虫或不规则交替关节炎。基于分子数据以及这些类群之间的形态和生理相似性，我们提出了新的科，Ajellomycetaceae。

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