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Updated: Mar 11, 2026

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
Published on: July 11, 2025
Hidden diversity in Thyridaria and a new circumscription of the Thyridariaceae
1Institute of Forest Entomology Forest Pathology and Forest Protection, Dept. of Forest and Soil Sciences, BOKU-University of Natural Resources and Life Sciences, Hasenauerstraße 38, 1190 Vienna, Austria; Division of Systematic and Evolutionary Botany, Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, 1030 Wien, Austria.
Abstract:
A multigene analysis of a combined ITS-LSU-SSU-rpb2-tef1 sequence data matrix was applied to infer the phylogenetic position of the genus Thyridaria in the Pleosporales. The generic type of Thyridaria, T. broussonetiae (syn. T. incrustans), is situated in a clade currently named Roussoellaceae, which becomes a synonym of Thyridariaceae. However, Thyridaria rubronotata does not belong to this clade, but is here recognised as Cyclothyriella rubronotata in its own family Cyclothyriellaceae. The Thyridariaceae contain the genera Thyridaria, Roussoella, Roussoellopsis, Neoroussoella and the new genus Parathyridaria. Roussoella acaciae is combined in Thyridaria and Roussoella percutaenea in Parathyridaria. Ohleria modesta and an additional new thyridaria-like genus, Hobus, are found to represent isolated lineages with unresolved phylogenetic affinites within the Pleosporales. For Ohleria the new family Ohleriaceae is established. Melanomma fuscidulum belongs to Nigrograna, and three new species are described in this genus. A strain named Biatriospora marina clusters with Nigrograna. Based on the newly recognised species in Nigrograna, morphology and ecology do in no way correlate among these genera, therefore we erect the new family Nigrogranaceae for Nigrograna and recommend to discontinue the use of the family name Biatriosporaceae until fresh material of B. marina becomes available for sequencing.
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