Cho, Sung-EunLee, Dong HyeonWingfield, Michael J.Marincowitz, Seonju2021-05-212021-05-212020-06-02Sung-Eun Cho , Dong-Hyeon Lee , Michael J. Wingfield & Seonju Marincowitz (2020) Ceratocystis quercicola sp. nov. from Quercus variabilis in Korea, Mycobiology, 48:4, 245-251, DOI: 10.1080/12298093.2020.1766649.1229-8093 (print)2092-9323 (online)10.1080/12298093.2020.1766649http://hdl.handle.net/2263/79996During a survey of putative fungal pathogens infecting oak trees in the Gangwon Province of the Republic of Korea, a fungus resembling a Ceratocystis sp. was repeatedly isolated from natural wounds on Quercus variabilis. Morphological comparisons and DNA sequence comparisons based on partial b-tubulin and TEF-1a gene regions showed that the fungus resided in a distinct lineage. This novel Ceratocystis species is described here as C. quercicola sp. nov. This is the first novel species of Ceratocystis to be reported from Korea. A pathogenicity test showed that it can cause lesions on inoculated trees but that it had a very low level of aggressiveness. The discovery of this fungus suggests that additional taxa residing in Ceratocystis are likely to be discovered in Korea in the future.en© 2020 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License.MicroascalesOakOphiostomatoidWoundKoreaQuercus variabilisCeratocystis quercicola sp. nov.Article