Novel taxa within nectriaceae: Cosmosporella gen. nov. and Aquanectria sp. nov. from freshwater habitats in china

Shi-Ke HUANG, Rajesh JEEWON, Kevin D. HYDE, Darbhe Jayarama BHAT & Ting-Chi WEN

en Cryptogamie, Mycologie 39 (2) - Pages 169-192

Published on 29 June 2018

To clarify phylogenetic relationships among Aquanectria, Cosmospora, Fusicolla and other related taxa in Nectriaceae, we examined detailed morphological characters and performed cladistic analyses of a concatenated dataset based on the ITS, LSU and β-tubulin DNA sequences of fungal specimens collected from freshwater habitats in China. A new genus, Cosmosporella, is described to accommodate C. olivacea as its type species. Cosmospora obscura is transferred to Cosmosporella based on morphological similarities and phylogenetic support. Aquanectria jacinthicolor, a freshwater lignicolous taxon, characterized by its orange ascomata and ellipsoid ascospores with broad paraphyses is a newly described freshwater species. This species has affinities with other two known species of Aquanectria and can be distinguished based on ascospore morphology. A specimen with sexual morph of Fusicolla aquaeductuum is reported for the first time.

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