New genera, species, combinations, and synonyms of saprobic Dothideomycetes and Sordariomycetes from subtropical Texas, USA

As a result of long-term field work in subtropical Texas, USA, three novel genera and three new species are introduced in Pezizomycotina to accommodate new or previously described taxa lacking DNA sequence data. In the Dothideomycetes, Piepenbringia, gen. nov. is established for Taeniolella multiplex (Pleosporales incertae sedis) distant from the type species T. exilis in Kirschsteiniotheliales. Ernakulamia americana, sp. nov. (Tetraplosphaeriaceae, Pleosporales), collected on dead leaves of Sabal minor (Arecaceae), forms a distinct monophyletic lineage distant from representative strains of E. cochinensis, the type species. In the Sordariomycetes, Pseudotaeniolella, gen. nov. is introduced for Taeniolella sabalicola in Distoseptisporaceae (Distoseptisporales), also distant from T. exilis in the Dothideomycetes. Parapenzigomyces ampelinus, gen. et sp. nov. collected on dead stems of hanging vines, forms a strongly supported lineage in Xylariales distant from the type species of Penzigomyces, P. nodipes, in Chaetosphaeriales. A new combination in Parapenzigomyces is proposed for P. flagellatus after examination of ex-type material. Sporidesmina is expanded to accommodate Stanjehughesia floridensis and a few other stanjehughesia-like fungi that cluster together in a distinct lineage incertae sedis in Xylariales. They are distant from St. hormiscioides, the type species in Chaetosphaeriales; therefore, five new combinations in Sporidesmina are proposed. Acrodictys holubovae, sp. nov. (Acrodictyaceae, Sordariomycetes incertae sedis), collected on dead culms of Arundinaria sp. (Poaceae), is phylogenetically distant from other Acrodictys species having clavate or pyriform conidia with 3–4 transverse septa and distinct pores. The identity of Solicorynespora foveolata is revised due to its similarity to several Distoseptispora species. The new combination D. foveolata is proposed, and the name D. bambusae is reduced to its synonym. The genus is also expanded to include previously overlooked tretic conidiogenesis. Pleopunctum ellipsoideum, D. euseptata, and D. meilingensis are newly recorded from North America. Novel phylogenetic placements are provided for Sporidesmium fragilissimum and Tubeufia berkeleyi.

基于在美国德克萨斯州亚热带地区开展的长期野外调查工作，本研究在子囊菌亚门（Pezizomycotina）中发表3个新属（gen. nov.）与3个新种（sp. nov.），用以容纳缺乏DNA序列数据的新类群，或此前已被描述但未获取分子序列的类群。在座囊菌纲（Dothideomycetes）中，为适配原归类于Taeniolella multiplex（格孢菌目（Pleosporales）地位未定）的类群，建立新属Piepenbringia（gen. nov.）；该类群与Kirschsteiniotheliales中的模式种T. exilis亲缘关系较远。Ernakulamia americana，sp. nov.（Tetraplosphaeriaceae，格孢菌目（Pleosporales））采集自矮棕榈（Sabal minor，棕榈科（Arecaceae））的枯死叶片，形成独立的单系支系，与模式种E. cochinensis的代表性菌株亲缘关系疏远。在粪壳菌纲（Sordariomycetes）中，建立新属Pseudotaeniolella（gen. nov.），以容纳原隶属于Distoseptisporaceae（隔孢壳菌目（Distoseptisporales））的Taeniolella sabalicola；该类群同样与座囊菌纲中的T. exilis亲缘关系较远。Parapenzigomyces ampelinus，gen. et sp. nov.采集自悬挂藤蔓的枯死茎秆，在炭角菌目（Xylariales）中形成支持度极高的单系支系，与刺盾炱目（Chaetosphaeriales）中Penzigomyces的模式种P. nodipes亲缘关系疏远。通过对模式标本材料（ex-type material）的研究，将P. flagellatus组合至Parapenzigomyces属，提出新组合。Sporidesmina属被扩充，以纳入Stanjehughesia floridensis及其他数株形态类似Stanjehughesia的真菌；这些类群在炭角菌目中形成独立的地位未定支系。它们与刺盾炱目中的模式种St. hormiscioides亲缘关系较远，因此提出5个Sporidesmina属的新组合。Acrodictys holubovae，sp. nov.（Acrodictyaceae，粪壳菌纲地位未定）采集自赤竹属（Arundinaria sp.，禾本科（Poaceae））的枯死茎秆，与其他具有棒状或梨形、具3-4个横隔膜且带有明显孔口的分生孢子（conidia）的Acrodictys属物种亲缘关系较远。鉴于Solicorynespora foveolata与数种Distoseptispora属物种形态相似，本研究对其分类地位进行了修订。提出新组合D. foveolata，并将D. bambusae降为其异名（synonym）。该属同时被扩充，以纳入此前被忽视的环痕产孢（tretic conidiogenesis）方式。Pleopunctum ellipsoideum、D. euseptata与D. meilingensis为北美地区新记录物种。本研究为Sporidesmium fragilissimum与Tubeufia berkeleyi提供了新的系统发育定位。