Orbilia laevimarginata sp. nov. and its asexual morph
Orbilia laevimarginata sp. nov. and its asexual morph
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Orbilia laevimarginata sp.
DOI：
10.11646/phytotaxa.203.3.3
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发表时间：
2015-03
期刊：
影响因子：
1.1
通讯作者：
Zefen Yu
中科院分区：
文献类型：
--
作者：
Ying Zhang;Xiaoxia He;Hans-Otto Baral;Min Qiao;Micheal Weib;Bin Liu;Ke-Qin Zhang;Zefen Yu
O. laevimarginata是一个新种，其无性型不能归属于现有的分类单元。无性型的特征是分生孢子圆柱形-椭圆形至长圆形，主要为单隔膜，单个或大多数为2-10个，在分生孢子梗的顶端头状排列。这些形态特征与食线虫无性型节肢动物属相似，但目前的分离物缺乏与线虫接触时产生任何诱捕装置的能力。根据Orbilia内不同类群的ITS rDNA序列进行系统发育分析，结果表明，O. laevimarginata聚簇在一起，形成一个分支，与Orbilia crenatomorphiata（= Hyalinia stac a）分开。这两个种与O.和一个未描述的种，它们都有一个由固体玻璃状突起组成的细圆齿到具牙齿的子囊盘边缘。该组聚类远离线虫捕获无性型属Arthrobotrophis，Dactylellina和Drechslerella内确定的那些物种，但也远离非捕食性无性型属Dactylella。结合形态学和系统发育分析，我们得出结论，这三个菌株属于一个单一的未描述的全形种。本文还讨论了三个无性型菌株的形态差异以及捕食线虫真菌与相关种的系统发育差异。
O. laevimarginata is here described as a new species, and also its asexual morph could not be assigned to an existing taxon. Anamorphic strains were obtained from three teleomorph specimens which were collected at different sites and dates. The anamorph is characterized by cylindric-ellipsoid to oblong conidia, mainly 1-septate, growing either singly or mostly from 2–10 denticles in a capitate arrangement on the tip of conidiophores. These morphological characters are similar to those of the nematophagous anamorph genus Arthrobotrys , but the present isolates lack the ability to produce any trapping devices when contacting with nematodes. Phylogenetic analysis inferred from ITS rDNA sequences on different groups within Orbilia showed that the isolates of O. laevimarginata clustered together in a clade separate from Orbilia crenatomarginata (= Hyalinia crystallina ). The two species are close to O. scolecospora and an undescribed species, which all have a crenulate to dentate apothecial margin composed of solid glassy processes. The group clustered distant from those species identified within the nematode-trapping anamorph genera Arthrobotrys , Dactylellina and Drechslerella , but also distant from the non-predacious anamorph genus Dactylella . By combining morphological and phylogenetic analysis, we conclude that the three isolates belong to a single undescribed holomorph species. The morphological differences among the three isolated anamorphic strains, and phylogenetic divergence of nematode-trapping fungi and related species are discussed.
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影响因子：
2.8
作者：
D. Pfister
通讯作者：
D. Pfister
DOI：
--
发表时间：
2007
期刊：
--
影响因子：
--
作者：
Chen;Xu;Liu;Ll;Xz
通讯作者：
Chen;Xu;Liu;Ll;Xz
影响因子：
2.1
作者：
D. Ahrén;B. Ursing;A. Tunlid
通讯作者：
D. Ahrén;B. Ursing;A. Tunlid
DOI：
--
发表时间：
1967
期刊：
--
影响因子：
--
作者：
Franz von Höhnel
通讯作者：
Franz von Höhnel
影响因子：
4.1
作者：
Jeewon, R;Liew, ECY;Hyde, KD
通讯作者：
Hyde, KD