Freshwater hyphomycetes in Sordariomycetes: two new species of Tainosphaeria (Chaetosphaeriaceae, Chaetosphaeriales) from Thailand

Ongoing investigation of diversity and taxonomy of lignicolous freshwater fungi in Thailand have revealed plenty of new hyphomycetous species. In this study, Tainosphaeria aquatica sp. nov. and T. thailandense sp. nov., occurred on submerged wood in Thailand, are described and illustrated based on the evidences of morphological characters and phylogenetic analysis of combined LSU, ITS and TEF1-alpha dataset. Tainosphaeria aquatica is characterized by hyaline, 0-3-septate, cylindrical to long fusiform conidia with hair-like, hyaline appendages at both ends. Tainosphaeria thailandense is distinct in having laurel-green, 0-1-septate, reniform to ellipsoidal conidia with polar appendages. A synopsis of morphological characteristics of Tainosphaeria species is provided.

Automated summary

The ongoing investigation of lignicolous freshwater fungi in Thailand has led to the discovery of numerous new hyphomycetous species. In this study, two new species, Tainosphaeria aquatica and T. thailandense, are described and illustrated based on morphological characteristics and phylogenetic analysis. A synopsis of the morphological characteristics of Tainosphaeria species is also presented.