title: Resolution of morphology-based taxonomic delusions:Acrocordiella, Basiseptospora, Blogiascospora, Clypeosphaeria, Hymenopleella, Lepteutypa, Pseudapiospora, Requienella, SeiridiumandStrickeria.
abstract: Fresh material, type studies and molecular phylogeny were used to clarify phylogenetic relationships of the nine generaAcrocordiella, Blogiascospora, Clypeosphaeria, Hymenopleella, Lepteutypa, Pseudapiospora, Requienella, SeiridiumandStrickeria. At first sight, some of these genera do not seem to have much in common, but all were found to belong to theXylariales, based on their generic types. Thus, the most peculiar finding is the phylogenetic affinity of the generaAcrocordiella, RequienellaandStrickeria, which had been classified in theDothideomycetesorEurotiomycetes, to theXylariales.AcrocordiellaandRequienellaare closely related but distinct genera of theRequienellaceae. Although their ascospores are similar to those ofLepteutypa, phylogenetic analyses do not reveal a particularly close relationship. The generic type ofLepteutypa, L. fuckelii, belongs to theAmphisphaeriaceae.Lepteutypa sambuciis newly described.Hymenopleellais recognised as phylogenetically distinct fromLepteutypa, andHymenopleella hippophaëicolais proposed as new name for its generic type,Sphaeria(=Lepteutypa) hippophaës. Clypeosphaeria uniseptatais combined inLepteutypa. No asexual morphs have been detected in species ofLepteutypa. Pseudomassaria fallax, unrelated to the generic type,P. chondrospora, is transferred to the new genusBasiseptospora, the genusPseudapiosporais revived forP. corni, andPseudomassaria carolinensisis combined inBeltraniella (Beltraniaceae). The familyClypeosphaeriaceaeis discontinued, because the generic type ofClypeosphaeria, C. mamillana, is a member of theXylariaceae. The genusSeiridium, of which the sexual morphBlogiascosporais confirmed, is unrelated toLepteutypa, as isLepteutypa cupressi. The taxonomy of the cypress canker agents is discussed. The familySporocadaceaeis revived for a large clade of theXylarialesthat containsHymenopleella, SeiridiumandStrickeriaamong a number of other genera. Neotypes are proposed forMassaria fuckeliiandSphaeria hippophaës. Didymella vexata, Seiridium marginatum, Sphaeria corni, Sphaeria hippophaës, Sphaeria seminudaare epitypified,Apiosporina fallax, Massaria occulta, Sphaeria mamillanaandStrickeria kochiiare lecto- and epitypified. We also provide DNA data forBroomella vitalbae, Cainia desmazieriandCreosphaeria sassafras.
authors.affiliation: Institute of Forest Entomology, Forest Pathology and Forest Protection, Dept. of Forest and Soil Sciences, BOKU-University of Natural Resources and Life Sciences, Hasenauerstraße 38, 1190 Vienna, Austria; Division of Systematic and Evolutionary Botany, Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, 1030 Vienna, Austria.
authors.forename: W M
authors.initials: WM
authors.lastname: Jaklitsch
authors.affiliation: 14 rue Roulette, F-21260 Véronnes, France.
authors.forename: A
authors.initials: A
authors.lastname: Gardiennet
authors.affiliation: Division of Systematic and Evolutionary Botany, Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, 1030 Vienna, Austria.
authors.forename: H
authors.initials: H
authors.lastname: Voglmayr
keywords: Ascomycota; Dothideomycetes; Pyrenulales; Sordariomycetes; Xylariales; new genus; phylogenetic analysis; pyrenomycetes