Abstract
Abstract Two scopulariopsis-like fungi were isolated when surveying fungi in pig farm soils in China. Sexual structures of these fungi were not observed and their conidia had spinous walls. Phylogenetic analysis based on nucleotide sequences of the internal transcribed spacer 1 and 2 and intervening 5.8S ribosomal RNA gene (ITS), large subunit ribosomal RNA gene (LSU), beta-tubulin (tub2) and translation elongation factor 1-alpha (tef1) gene showed that they were new members of the genus Microascus, and the name M. aculeatus and M. spinosporus were introduced. Genetically the two new species clustered in a well-supported clade close to M. longicollis, but differed in producing relatively long branches. Morphologically M. aculeatus could be distinguished by its conidia with sparse but long spines; M. spinosporus resembled three species of the genus Scopulariopsis, S. asperula, S. brevicaulis and S. flava, but was different in the color of colony and conidia, and the form of conidiophores.
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