taxonomic reconsideration of a sequestrate fungus, octaviania columellifera, with the proposal of a new genus, heliogaster, and its phylogenetic relationships in the boletales.during taxonomic revision of genus octaviania in japan we examined herbarium and fresh specimens of o. columellifera and o. asterosperma sensu s. yoshimi & y. doi with morphological and molecular techniques. these two species were identical in both macro- and micromorphological characters and were clearly different from the generally known o. asterosperma. the identity of the two species and their distinctness from o. asterosperma was further supported by both nuclear large subunit and its rdna ...201020120234
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