Cytospora chayuensis Ning Jiang 2026, sp. nov.
Authors/Creators
- 1. Key Laboratory of Forest Ecology in Tibet Plateau, Ministry of Education, Institute of Tibet Plateau Ecology, Xizang Agricultural and Animal Husbandry University, Linzhi, Xizang 860000, China
- 2. The Key Laboratory for Silviculture and Conservation of the Ministry of Education, Beijing Forestry University, Beijing 100083, China
- 3. Key Laboratory of Forest Protection of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing 100091, China
Description
Cytospora chayuensis Ning Jiang sp. nov.
Fig. 4
Etymology.
Named after the collection site of the type specimen, Chayu County.
Description.
Associated with branch canker disease of Salix lasiogyne. Teleomorph: Undetermined. Anamorph: Conidiomata Group AII (type a 7), pycnidial, scattered, immersed to semi-immersed in the bark, conical, 650–1000 μm diam., 350–600 μm high, with multiple subdivided locules with common walls. Conceptacle conspicuous. Ectostromatic disc white, circular to ovoid, 240–380 μm diam., with a single ostiole per disc in the center. Ostiole grey to brown, 75–140 μm diam. Conidiophores borne along the locules, hyaline, unbranched or branched at the base, (11.5 –) 13.5–24.5 (– 35) × (1 –) 1.5–2 (– 2.5) μm. Conidiogenous cells enteroblastic, phialidic, subcylindrical to cylindrical. Conidia hyaline, allantoid, thin-walled, aseptate, smooth, (7.5 –) 8.5–10.5 (– 11.5) × 1.5–2 (– 2.5) (av. = 9.5 ± 1 × 2.1 ± 0.2, n = 50) μm, L / W ratio = 4.5–5.2.
Culture characteristics.
Colonies on PDA flat, spreading, with moderate aerial mycelium and entire margin, smoke grey, fast growing, reaching 90 mm diam. after 1 wk at 25 ° C, sterile.
Materials examined.
China, • Xizang Autonomous Region (Tibet), Linzhi (Nyingchi) City, Chayu (Zayü) County, 29°19'47"N, 97°6'3"E, 2192 m asl, from cankered branches of Salix lasiogyne, 22 Oct. 2024, Ning Jiang, Min Liu, Jieting Li & Yi Li (holotype CAF 800150, ex-type cultures CFCC 71396 and CFCC 71397).
Notes.
Cytospora chayuensis sp. nov. is phylogenetically closely related to C. multiseriata (Fig. 2). Morphologically, C. chayuensis differs from C. multiseriata by possessing a conspicuous conceptacle and larger conidia (8.5–10.5 × 1.5–2 μm in C. chayuensis vs. 4–4.5 × 1.5 μm in C. multiseriata). Additionally, it differs from C. multiseriata by 5 / 513 bp (0.97 %) in ITS, 2 / 238 bp (0.84 %) in act, 4 / 726 bp (0.55 %) in rpb 2, 46 / 306 bp (15.03 %) in tef 1, and 29 / 401 bp (7.23 %) in tub 2 (Lin et al. 2024; Jiang et al. 2025 a).
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Collection code
- CAF, CFCC
- Material sample ID
- CAF 800150, CFCC 71396, CFCC 71397
- Event date
- 2024-10-22
- Verbatim event date
- 2024-10-22
- Scientific name authorship
- Ning Jiang
- Kingdom
- Fungi
- Phylum
- Ascomycota
- Order
- Diaporthales
- Family
- Valsaceae
- Genus
- Cytospora
- Species
- chayuensis
- Taxon rank
- species
- Taxonomic status
- sp. nov.
- Type status
- holotype
- Taxonomic concept label
- Cytospora chayuensis Jiang, 2026
References
- Lin L, Fan X, Groenewald J, Jami F, Wingfield MJ, Voglmayr H, Jaklitsch W, Castlebury L, Tian C, Crous PW (2024) Cytospora: An important genus of canker pathogens. Studies in Mycology 109: 323–401. https://doi.org/10.3114/sim.2024.109.05
- Jiang N, Voglmayr H, Li J, Xue H, Li Y, Crous P (2025 a) Species diversity of Cytospora associated with forest canker diseases in Xizang (Tibet), China. Persoonia 55: 361–438. https://doi.org/10.3114/persoonia.2025.55.10