taxonID	type	description	language	source
03B7DB73FFD1FFFD5EC4FBB8FAD1633C.taxon	description	MycoBank: MB 849513	en	Zhang, Hong, Jiang, Yu-Lan (2025): Cytospora guizhouensis sp. nov., an endophytic fungus from Rosa roxburghii in Guizhou, China. Phytotaxa 722 (3): 207-221, DOI: 10.11646/phytotaxa.722.3.1, URL: https://doi.org/10.11646/phytotaxa.722.3.1
03B7DB73FFD1FFFD5EC4FBB8FAD1633C.taxon	etymology	Etymology: referring to Guizhou Province, China, where the ex-type strain was isolated.	en	Zhang, Hong, Jiang, Yu-Lan (2025): Cytospora guizhouensis sp. nov., an endophytic fungus from Rosa roxburghii in Guizhou, China. Phytotaxa 722 (3): 207-221, DOI: 10.11646/phytotaxa.722.3.1, URL: https://doi.org/10.11646/phytotaxa.722.3.1
03B7DB73FFD1FFFD5EC4FBB8FAD1633C.taxon	description	Holotype: HGUP 19 - 0048. Endophytic in roots of Rosa roxburghii. Sexual morph: not observed. Asexual morph: Conidiomata (Group AIII), pycnidial, subspherical to spherical, brown to dark brown, most solitary, semi-immersed to immersed, mostly with setae and ostiole, exuding dark brown conidial masses, 100 – 1200 μm diam. Locules numerous, irregular, subdivided frequently by invaginations with common walls. Conidiophores borne along the locules, hyaline, smooth, thin-walled, unbranched, 9.5 – 16 × 1 – 2 μm (x = 12 × 1.5 μm, n = 10). Conidiogenous cells enteroblastic, polyphialidic, hyaline, smooth, cylindrical to ampulliform, tapering towards the apex, 6.5 – 9.5 × 1 – 2 μm (x = 8 × 1.5 μm, n = 10). Conidia hyaline, smooth, thin-walled, aseptate, allantoid, eguttulate, with bluntly rounded ends, straight to slightly curved, 1.5 – 3 × 0.5 – 1 μm (x = 2 × 0.8 μm, n = 30). Culture characteristics: Colonies reaching 55 mm diam. on PDA after 21 d in the dark at 28 ° C; grayish-white, flocculent, aerial mycelium abundant, with irregular edges and reverse concolorous.	en	Zhang, Hong, Jiang, Yu-Lan (2025): Cytospora guizhouensis sp. nov., an endophytic fungus from Rosa roxburghii in Guizhou, China. Phytotaxa 722 (3): 207-221, DOI: 10.11646/phytotaxa.722.3.1, URL: https://doi.org/10.11646/phytotaxa.722.3.1
03B7DB73FFD1FFFD5EC4FBB8FAD1633C.taxon	materials_examined	Material examined: CHINA, Guizhou Province, Liupanshui City, 25 ° 52 ′ 52 ″ N, 104 ° 33 ′ 59 ″ E, on healthy roots of Rosa roxburghii, 4 August 2020, H. Zhang (HGUP 19 - 0048, holotype), ex-type living culture: GUCC 19 - 0048.1; other living culture: GUCC 19 - 0052.1 and GUCC 19 - 0119.1.	en	Zhang, Hong, Jiang, Yu-Lan (2025): Cytospora guizhouensis sp. nov., an endophytic fungus from Rosa roxburghii in Guizhou, China. Phytotaxa 722 (3): 207-221, DOI: 10.11646/phytotaxa.722.3.1, URL: https://doi.org/10.11646/phytotaxa.722.3.1
03B7DB73FFD1FFFD5EC4FBB8FAD1633C.taxon	discussion	Notes: Multigene phylogenetic analyses revealed that Cytospora guizhouensis was closely related to C. lumnitzericola, forming a sister branch with high statistical support (ML-BS = 99 %, BYPP = 1) (Fig. 1). Sequence similarity between these two species (GUCC 19 - 0048.1 and MFLUCC 17 - 0508) in the act region was 94.49 % (240 / 254) with 4 gaps, the ITS region was 95.87 % (511 / 533) with 9 gaps, and the rpb 2 region was 97.43 % (719 / 738) with no gaps. The ex-type MFLUCC 17 - 0508 was missing tef 1 and tub 2 gene sequences. Morphologically, C. guizhouensis can be distinguished from C. lumnitzericola in several key characteristics. The conidiogenous cells of C. guizhouensis are cylindrical to ampulliform (6.5 – 9.5 × 1 – 2 μm), whereas those of C. lumnitzericola are exclusively ampulliform (8.5 – 14 × 0.6 – 1.4 μm). Additionally, the conidial dimensions differ significantly between the two species: C. guizhouensis produces smaller conidia (1.5 – 3 × 0.5 – 1 μm) in contrast to the larger conidia of C. lumnitzericola (4 – 4.5 × 1 – 1.3 μm). No morphological characteristics such as conidiomata, locules, pycnidial wall, and conidiophores were described for C. lumnitzericola (Norphanphoun et al. 2018). Therefore, C. guizhouensis was introduced as a new species.	en	Zhang, Hong, Jiang, Yu-Lan (2025): Cytospora guizhouensis sp. nov., an endophytic fungus from Rosa roxburghii in Guizhou, China. Phytotaxa 722 (3): 207-221, DOI: 10.11646/phytotaxa.722.3.1, URL: https://doi.org/10.11646/phytotaxa.722.3.1
