Abstract
Gohteikhimyces, a new genus of dematiaceous hyphomycete occurring on decaying wood submerged in a freshwater stream of Taiwan, is proposed based on morphological and molecular data. It produces effuse, black, and somewhat glistening colonies on the surface of natural substratum, which mainly composed of solitary, dry, dark, cymbiform or ellipsoidal to obovoid, 3–4-euseptate conidia, and secede rhexolytically from semi-macronematous conidiophores with percurrent regeneration. The conidia resemble those of Bactrodesmium species but they are not produced from sporodochial conidiomata. Phylogenetically, this new genus is placed in the Savoryellomycetidae incertae sedis, closely related to Flammispora, but is distant from the Fucosporellales which contains the Bactrodesmium species. This new genus is proposed based on three collections from different localities in Taiwan, with descriptions of two novel species, G. bactrodesmioides and G. taroides, which differ in geographical conditions of collection sites and conidial morphology. The two species are supported by sufficient differences in their LSU, SSU, and the ITS sequences. In this paper, the genus Gohteikhimyces is illustrated with line diagrams, light micrographs, and scanning electron micrographs.