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Two new termite-pathogenic species, Ophiocordyceps globiperitheciata and O. longistipes , are described from Yunnan Province, China. Six-locus (ITS, nrSSU, nrLSU, tef-1α , rpb1 and rpb2 ) phylogenetic analyses in combination with morphological observations were employed to characterize these two species. Phylogenetically, O. globiperitheciata is most closely related to Hirsutella cryptosclerotium and O. communis , whereas O. longistipes shares a sister relationship with O. fusiformis . However, O. globiperitheciata differs from H. cryptosclerotium by parasitizing Blattodea and producing clavate, unbifurcated stromata. Ophiocordyceps globiperitheciata is distinguished from O. communis by multiple stromata, shorter asci and ascospores. Ophiocordyceps longistipes differs from O. fusiformis in producing larger stromata, perithecia, asci and ascospores, as well as smaller citriform or oval conidia. Morphological descriptions of the two new species and a dichotomous key to the 19 termite-pathogenic Ophiocordyceps species are presented.
Fan et al. (Fri,) studied this question.