Abstract

This study re-evaluates the classification of the Lulworthiomycetidae based on phylogenetic analyses of 18S, 28S and ITS (internal transcribed spacers and 5.8S) regions of rDNA and protein coding genes (TEF1α, RPB1, RPB2, TUB2, MCM7) along with comprehensive morphological comparisons. Based on the current phylogenetic data we consider the genus Spathulospora as a member of the Lulworthiales, Lulworthiomycetidae, and redundancy of the taxon Spathulosporales. This study confirms Lulworthia as polyphyletic with the characteristic filiform, long ascospores with an end chamber, which is found in many genera: Halazoon, Halophilomyces, Lulwoana, Lulwoidea, Matsusporium, Paralulworthia, Paramoleospora, Rostrupiella, and Sammeyersia. These genera can be distinguished by morphology, their asexual morphs and molecular phylogeny. The Lulworthiomycetidae includes 23 genera and 69 species. One new genus (Lindriella) and eight new species (Hydea mangrovei, Lulworthia norwegica, Matsusporium japonica, Moromyces mangrovis, Paralulworthia lignicola, Rostrupiella longispora, Sammeyersia yanbuensis, S. thailandica) are introduced, with four new combinations.