XVI International Botanical Congess

A standard genus concept, based on morphological criteria of peridium, ascospores, apical ring, paraphyses, teleomorph-anamorph connections and a conidiogenesis, was used to distinguish natural groups of the species currently placed in Chaetosphaeria Tul.& C. Tul. Although the pyrenomycetous genus Chaetosphaeria was defined for species having septate, hyaline ascospores, distinct apical ring, persistent paraphyses, brittle peridium and phialidic conidiogenesis, nevertheless very unrelated species were included. The revision of 28 species currently placed in Chaetosphaeria with 3-7-septate, bicolour ascospores and entirely different anatomy of the peridium and teleomorph-anamorph connections revealed that they form a polyphyletic group of species. They are classified into six genera of the three families, viz. Trichosphaeriaceae Winter, Helminthosphaeriaceae Samuels & al. and Chaetosphaeriaceae Reblova & al.