Berkleasmium is a polyphyletic genus comprising 37 dematiaceous hyphomycetous species. In this study, independent collections of the type species, B. concinnum, were made from Eastern North America. Nuclear internal transcribed spacer rDNA (ITS) and partial nuc 28S large subunit rDNA (LSU) sequences obtained from collections and subsequent cultures showed that Berkleasmium concinnum is the asexual morph of Neoacanthostigma septoconstrictum (Tubeufiaceae, Tubeufiales). Phylogenies inferred from Bayesian inference and maximum likelihood analyses of ITS-LSU sequence data confirmed this asexual-sexual morph connection and a re-examination of fungarium reference specimens also revealed the co-occurrence of N. septoconstrictum ascomata and B. concinnum sporodochia. Neoacanthostigma septoconstrictum is therefore synonymized under B. concinnum on the basis of priority. A specimen identified as N. septoconstrictum from Thailand is described as N. thailandicum sp. nov., based on morphological and genetic distinctiveness.

中文翻译：

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Berkleasmium类型物种中的无性-性形态连接。

Berkleasmium是一个多属属，包含37种皮臭菌种。在这项研究中，来自北美东部的B. continnum类型物种的独立集合。从收集物和随后的培养物中获得的核内转录间隔区rDNA（ITS）和部分nuc 28S大亚基rDNA（LSU）序列显示，conc草是无花小Neo的无性形态（Tubeufiaceae，Tubeufiales）。从贝叶斯推断和ITS-LSU序列数据的最大似然分析推断的系统发育，证实了这种无性-性形态联系，对真菌参考标本的重新检查也揭示了分离的猪牙结节奈瑟氏球菌和子叶双歧孢子虫同时存在。因此，新ac蚁隔sep在B下是同义词。优先权的基础上。来自泰国的鉴定为N. septoconstrictum的标本被描述为N. thailandicum sp.。nov。，基于形态和遗传特征。