Brunneodinemasporium jonesii and Tainosphaeria jonesii spp. nov. (Chaetosphaeriaceae, Chaetosphaeriales) from southern China

Abstract

A study of the fungi of Guangxi Province, China revealed two novel species, namely Brunneodinemasporium jonesii and Tainosphaeria jonesii which are introduced in this paper. Molecular analysis based on combined ITS and LSU sequence data showed that 1) Brunneodinemasporium jonesii formed a distinct clade with the type species B. brasiliense and is therefore introduced as the second species in this monotypic genus; 2) The isolates of Tainosphaeria jonesii clustered together with T. crassiparies and T. siamensis, and showed a close relationship with T. siamensis, but is a phylogenetically distinct species. It is herein described as the third species of Tainosphaeria. Morphological examination showed that 1) Brunneodinemasporium jonesii differs from the generic type species as its conidia have mucilaginous balls at each end, which are aggregated in chains, arising from conidiogenous cells that are aggregated into conspicuous slimy, dome-shaped masses; 2) Tainosphaeria jonesii is characterized by its mononematous conidiophores, phialidic conidiogenous cells with funnel-shaped collarettes at the apices and conidia with single unbranched, flexuous, tubular appendages at each end. Descriptions, illustrations and molecular analyses are provided for these new species.