Conioscypha nakagirii, a new species from naturally submerged wood in Thailand based on morphological and molecular data

Conioscypha nakagirii, a novel fungus, is described and illustrated from decaying submerged wood collected in a small stream in Pak Chong District, Nakhon Ratchasima Province, Thailand. Morphologically, it differs from known Conioscypha species and similar taxa in that it has large, turbinate to pyriform, black and smooth-walled conidia. Phylogenetic analysis of three loci (nuc 18S and nuc 28S, and RPB2) supports a placement of this taxon as a new species in Conioscypha (Conioscyphales, Hypocreomycetidae, Sordariomycetes), as a sister group to a clade including C. lignicola, C. japonica, C. varia and C. peruensis, and shares some morphological characteristics with C. fabiformis and C. taiwaniana. Both morphological and molecular evidence justifies the introduction of the new species, C. nakagirii.