New species and records of Diaporthe from Jiangxi Province, China Author Yang, Qin The Key Laboratory for Silviculture and Conservation of the Ministry of Education, Beijing Forestry University, Beijing 100083, China & Forestry Biotechnology Hunan Key Laboratories, Central South University of Forestry and Technology, Changsha 410004, China & The Key Laboratory for Non-Wood Forest Cultivation and Conservation of the Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China Author Jiang, Ning https://orcid.org/0000-0002-9656-8500 The Key Laboratory for Silviculture and Conservation of the Ministry of Education, Beijing Forestry University, Beijing 100083, China Author Tian, Cheng-Ming https://orcid.org/0000-0002-3352-7664 The Key Laboratory for Silviculture and Conservation of the Ministry of Education, Beijing Forestry University, Beijing 100083, China chengmt@bjfu.edu.cn text MycoKeys 2021 2021-01-14 77 41 64 http://dx.doi.org/10.3897/mycokeys.77.59999 journal article http://dx.doi.org/10.3897/mycokeys.77.59999 1314-4049-77-41 FAE5387DCE535A42BEF6F4E81E9297AA Diaporthe xunwuensis C.M. Tian & Q. Yang sp. nov. Figure 9 Diagnosis. Distinguished from the phylogenetically closely-related species D. oraccinii in having longer conidiophores and larger alpha conidia. Etymology. Named after the county (Xunwu) where the species was first collected. Description. On PDA: Conidiomata pycnidial, globose, solitary or aggregated, deeply embedded in the medium, erumpent, dark brown to black. Hyaline conidial drops exuding from ostioles. Conidiophores (18.5-)21.5-30(-32.5) x 1-1.5(-2) μm , cylindrical, hyaline, phiailidic, unbranched, straight to sinuous. Alpha conidia (6.5-)7-8.5 x 2-3 μm , aseptate, hyaline, ellipsoidal to fusiform, rounded at one end, slightly apex at the other end, usually with 2-guttulate. Beta conidia not observed. Figure 9. Diaporthe xunwuensis on unknown host (BJFC-S1679) a the colony on PDA and conidiomata b alpha conidia c conidiogenous cells attached with alpha conidia. Scale bars: 10 μm ( a-c ). Culture characters. Colony at first white, becoming dark brown in the centre with age. Aerial mycelium white, dense, fluffy, with black conidial drops exuding from the ostioles. Specimens examined. China. Jiangxi Province: Ganzhou City, unknown dead wood, 25°45'17"N , 115°00'41"E , 23 Jul 2018, Q. Yang , Y. Liu , Y.M. Liang & C.M. Tian (holotype BJFC-C003; ex-type culture: CFCC 53085; living culture: CFCC 53086). Notes. Two isolates representing D. xunwuensis clustered in a well-supported clade and appear most closely related to D. oraccinii . Diaporthe xunwuensis can be distinguished from D. oraccinii , based on ITS, his3 and tef1-α loci (5/471 in ITS, 5/432 in his3 and 5/325 in tef1-α ). Morphologically, D. xunwuensis differs from D. oraccinii in having longer conidiopores (21.5-30 vs. 10.5-22.5 μm ) and larger alpha conidia (7-8.5 x 2-3 vs. 5.5-7.5 x 0.5-2 μm ) ( Gao et al. 2016 ).