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Systematic revision of the genera Holwaya and Patinella (Ascomycota) based on phylogenetic traits

The genus Holwaya was until recently considered monospecific with many taxa treated as synonyms of H. mucida, except for H. pusilla that was transferred to the genus Claussenomyces, and H. salicis to Durandiella. Holwaya was previously considered a member of the family Bulgariaceae based on morphological and DNA data (Wang et al. 2006, Lumbsch & Huhndorf 2010), but it was removed from this family by Crous et al. (2014) who regarded Bulgariaceae as a synonym of Phacidiaceae. In the latest classifications of Ascomycota, Baral (in Jaklitsch et al. 2016), followed by Wijayawardene et al. (2017), placed the genus in Tympanidaceae. Yet, the revision of Tympanidaceae (Quijada et al. in prep.), and the results of the 15 genes phylogeny of Leotiomycetes made by Johnston et al. (in press), showed that the genus is not related to Tympanis, but formed a sister clade to Thelebolales in Leotiomycetes as incertae sedis (Johnston et al. 2019). Here we provide the morphological and phylogenetic evidences that link the genera Holwaya and Patinella. The aim of this work is to improve the classification of Leotiomycetes by placing two genera with currently uncertain position into a new family with the aid of polyphasic taxonomy.

Integrative taxonomy ; Leotiales ; phacidialean fungi ; reclassification ; Tympanidaceae

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