Unravelling the diversity of European Caliciopsis (Coryneliaceae, Ascomycota): Caliciopsis valentina sp nov and C. beckhausii comb. nov., with a worldwide key to Caliciopsis

The new species Caliciopsis valentina from the eastern Iberian Peninsula is characterized morphologically, anatomically, and molecularly. The occurrence of C. subcorticalis (Cooke & Ellis) Fitzp. in Europe is discussed. Based on the revision of fresh and herbarium specimens we propose the new combination Caliciopsis beckhausii with a neotype selected for this taxon. New molecular data (ITS and nuLSU) are used in combination with available sequences to build a preliminary phylogenetic hypothesis for this genus. We point out some previously overlooked colour-reaction tests as relevant for the systematics of the group. Finally, an updated key for all known Caliciopsis species is provided.