Kretzschmaria quercicola sp nov., an Undescribed Fungus from Living Oak in Mt. Daeryong, Korea

초록

We encountered an unfamiliar ascomycete fruiting body, fitting characteristics of the genus Kretzschmaria, which features in a stipitate ascigerous stroma with carbonaceous interior and disintegrating perithecia. In this study, we report and characterize a new species of the decaying fungus. Compared to other species, one of the notable features of this specimen (TPML150908-046) is its stromatal size (up to 15 cm). Although TPML150908-046 is morphologically similar to K. milleri and K. sandvicensis, it differs sharply from both species in apical ring size (TPML150908-046, 6.5 similar to 10.5 mu m; K. milleri, 11 similar to 16 mu m) and ascospore width (TPML150908-046, 10.5 similar to 17 mu m; K. sandvicensis, 8.5 similar to 11.5 mu m). Phylogenetic trees based on beta-tubulin, ITS, and RPB2 sequences showed that our collection clustered with K. sandvicensis, with the respective similarities for these sequences being 95.6%, 91.3%, and 97.7%, signifying it as another species. With these results, we report it as a new species, which we call Kretzschmaria quercicola sp. nov.

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