COLEOFASCICULUS GEN. NOV. (CYANOBACTERIA): MORPHOLOGICAL AND MOLECULAR CRITERIA FOR REVISION OF THE GENUS MICROCOLEUS GOMONT 1
COLEOFASCICULUS GEN. NOV. (CYANOBACTERIA): MORPHOLOGICAL AND MOLECULAR CRITERIA FOR REVISION OF THE GENUS MICROCOLEUS GOMONT 1
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DOI：
10.1111/j.1529-8817.2008.00604.x
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发表时间：
2008-12
影响因子：
2.9
通讯作者：
Maria A. Siegesmund;J. Johansen;U. Karsten;T. Friedl
中科院分区：
文献类型：
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作者：
Maria A. Siegesmund;J. Johansen;U. Karsten;T. Friedl
目前分类为蓝藻微鞘藻属的物种被确定为 16S rDNA 系统发育中的两个不同的进化枝，一个包含颤藻科内的类群，另一个包含藻科内的类群。通过对 16S-23S 内部转录间隔区 (ITS) 区域序列和二级结构的分析证实了这两个谱系。 Microcoleus 的模式种是 M. vaginatus Gomont，该分类群属于颤藻科。因此，席藻科中的微鞘藻类群必须被放置在不同的属中，并且我们建议新的鞘束属（Coleofasciculus）包含目前放置在微鞘藻中的海洋类群。鞘束菌的模式种是经过充分研究且分布广泛的海洋垫层形成物种 Microcoleus chthonoplastes (Mert.) Zanardini ex Gomont。区分这两个家族的其他特征包括细胞分裂类型和类囊体结构。
Species currently classified within the cyanobacterial genus Microcoleus were determined to fall into two distinct clades in a 16S rDNA phylogeny, one containing taxa within the Oscillatoriaceae, the other containing taxa within the Phormidiaceae. The two lineages were confirmed in an analysis of the 16S–23S internal transcribed spacer (ITS) region sequences and secondary structures. The type species for Microcoleus is M. vaginatus Gomont, and this taxon belongs in the Oscillatoriaceae. Consequently, Microcoleus taxa in the Phormidiaceae must be placed in separate genera, and we propose the new genus Coleofasciculus to contain marine taxa currently placed in Microcoleus. The type species for Coleofasciculus is the well‐studied and widespread marine mat‐forming species Microcoleus chthonoplastes (Mert.) Zanardini ex Gomont. Other characters separating the two families include type of cell division and thylakoid structure.