<i>Tricladiaceae</i> <i>fam. nov</i>. (<i>Helotiales</i>, <i>Leotiomycetes</i>)

Abstract

To resolve the polyphyletic nature of Solenopeziaceae as it was originally circumscribed, we establish a new family Tricladiaceae for those genera originally placed in Solenopeziaceae that have aquatic hyphomycetelike asexual morphs and/or a sexual morph with glabrous apothecia. These include Cudoniella , Geniculospora , Graddonia , Halenospora , Mycofalcella , Spirosphaera , and Tricladium . Solenopeziaceae is confined to the genera Lasiobelonium, Solenopezia, Trichopeziza , and Trichopezizella , all of which have a sexual morph having apothecia with smooth-walled hairs. This taxonomy is supported by a multi-gene analysis using up to 15 genes, with a few of the taxa placed on the basis of a separate ITS phylogeny. Tricladiaceae forms a monophyletic clade with a basal sister relationship to Pleuroascaceae plus Helotiaceae ; Solenopeziaceae forms a monophyletic clade with a basal sister relationship to Lachnaceae .

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