Colletotrichum karsti Y. L. Yang, Z. Y. Liu, K. D. Hyde & L. Cai, Cryptog. Mycol. 32: 241. 2011 Material examined. China. Sichuan Province, Guangyuan City, Lizhou District, Shuiwo Village, 32 ° 23 ' 38 " N, 105 ° 39 ' 22 " E, from leaf of Juglans regia L., 11 Oct. 2023, Y. X. Li, L. Lin & X. L. Fan (BJFC - S 2224, living culture CFCC 59901). Notes. Colletotrichum karsti was identified as a pathogen on Vanda species, causing ellipsoid lesions on leaves, and was also found as an endophyte in roots in Guizhou Province, China. This species is recognized as the most prevalent and geographically widespread within the C. boninense species complex, with a broad host range (Yang et al. 2011; Damm et al. 2012 a; Jayawardena et al. 2016 b). Zhang et al. (2022) synonymized C. wuxuhaiense with C. karsti. In this study, the strain CFCC 59901 is confirmed to be C. karsti based on morphological characteristics and DNA sequence data. Furthermore, this represents a new host record for C. karsti on walnut trees.

Published as part of Li, Yixuan, Lin, Lu, Cao, Jing, Gan, Mingxu & Fan, Xinlei, 2024, Three new species of Colletotrichum (Glomerellales, Glomerellaceae) associated with walnut (Juglans regia) anthracnose from China, pp. 147-167 in MycoKeys 108 on pages 147-167, DOI: 10.3897/mycokeys.108.125382