Department of Botany, Faculty of Science, Sohag University, Sohag 82524, Egypt;
IMA Fungus. 2011 Jun;2(1):1-6. doi: 10.5598/imafungus.2011.02.01.01. Epub 2011 Mar 10.
Annulatascus nilensis sp. nov., from freshwater habitats in Egypt, is described, illustrated and compared to other species in the genus. Phylogenetic analyses of its LSU rDNA sequence with similar fungi placed the new species in the genus Annulatascus (Annulatascaceae, Sordariomycetidae incertae sedis). Annulatascus nilensis is characterized by immersed ascomata with an ascomatal neck oriented horizontally to the substrate surface, asci with a long, narrow stalk and massive bipartite apical ring, and 5-11-septate, hyaline ascospores surrounded by a large irregular, granular sheath that is not seen in water.
埃及淡水生境中的 Annulatascus nilensis sp. nov. 被描述、图示并与属内其他种进行了比较。其 LSU rDNA 序列的系统发育分析表明，新种属于 Annulatascus 属（Annulatascaceae，Sordariomycetidae incertae sedis）。Annulatascus nilensis 的特征是埋生的子囊壳，子囊壳颈呈水平状朝向基质表面，具有长而狭窄的梗和巨大的二分叉顶端环，以及 5-11 个隔膜、透明的子囊孢子，周围环绕着一个大的不规则、颗粒状的鞘，但在水中看不到。
