Comoclathris xiangshawanensis X. G. Tian, T. Y. Du & D. F. Bao 2026, sp. nov.
Authors/Creators
- 1. School of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang 550003, China & Guizhou Key Laboratory of Agricultural Microbiology, Guizhou Academy of Agricultural Sciences, Guiyang 550009, China
- 2. Yunnan International Joint Laboratory of Digital Conservation and Germplasm Innovation and Application of China-Laos Tea Resources, School of Tea and Coffee, Pu'er University, Pu'er 665000, China
- 3. Department of Health Sciences, Faculty of Medicine and Health Sciences, University of Mauritius, Réduit 80837, Mauritius & Honghe Center for Mountain Futures, Kunming Institute of Botany, Chinese Academy of Sciences, Honghe County 654400, Yunnan, Kunming, China & School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou Province 563000, China
- 4. Center for Yunnan Plateau Biological Resources Protection and Utilization & Yunnan International Joint Laboratory of Fungal Sustainable Utilization in South and Southeast Asia, College of Biology and Food Engineering, Qujing Normal University, Qujing 655099, China
Description
Comoclathris xiangshawanensis X. G. Tian, T. Y. Du & D. F. Bao sp. nov.
Fig. 4
Etymology.
Named after the type locality, “ the desert region of Xiangshawan, China ”.
Holotype.
GMB-W 1526.
Description.
Saprobic on dead branches of an unidentified wood. Sexual morph: Ascomata 100–200 × 90–200 μm (x ̄ = 132 × 118 μm, n = 10), solitary, scattered or aggregated into small groups, semi-immersed, subglobose, black, ostiole not obvious. Peridium 10–20 μm wide, comprising thin-walled cells of textura angularis, dark brown to black. Hamathecium comprising numerous, 2 μm wide, filamentous, septate, branched, cellular pseudoparaphyses, hyaline, embedded in a gelatinous matrix, extending above the asci. Asci 65–85 × 15–23 μm (x ̄ = 73 × 21 μm, n = 30), bitunicate, fissitunicate, 8 - spored, cylindrical-clavate, short pedicellate, apically rounded. Ascospores 17–23 × 7–11 μm (x ̄ = 19 × 8.5 μm, n = 30), 1–2 - seriate, broadly fusiform, initially yellowish, becoming brown, muriform, with 5 (– 6) transversely septa and 1–2 vertical septa, consisting of 9–14 cells, with conical or obtuse ends, straight or slightly curved, smooth-walled, surrounded by a mucilaginous sheath. Asexual morph: Undetermined.
Culture characteristics.
Ascospores germinated on PDA within 12 h at 28 ° C and germ tubes were produced around spores. Colonies on PDA reached 2 cm diam. after one week at 28 ° C. Colonies obverse: circular, white-cream, with sparsely hairy edge; cream to light yellow from below.
Material examined.
China • Inner Mongolia Autonomous Region, Ordos City, Xiangshawan, on dead branches of an unidentified wood in the desert, 01 October 2023, J. Y. Zhang, BTD 16 (GMB-W 1526, holotype), ex-type, GMBCC 2305, other living culture, GMBCC 2318.
GenBank numbers.
GMBCC 2305: ITS = PX 660510, LSU = PX 660514, SSU = PX 660506, rpb 2 = PX 672977; GMBCC 2318: ITS = PX 660511, LSU = PX 660515, SSU = PX 660507, rpb 2 = PX 672978.
Notes.
Comoclathris xiangshawanensis clustered with C. antarctica (WA 0000074564, ex-type) and C. acuminata Mattoo, Nonzom & A. Ghosh (MCC 9771, ex-type and MN 3-2019) in the phylogenetic tree (Fig. 2). A comparison of nucleotide base pair differences between our new strain (GMBCC 2305, ex-type) and C. antarctica (WA 0000074564, ex-type) in ITS and LSU, the result (without gaps) showed a 1.65 % (8 / 484 bp) difference in ITS, 0.24 % (2 / 818 bp) difference in LSU. Between our new strain (GMBCC 2305, ex-type) and C. acuminata (MCC 9771, ex-type) in ITS and LSU, the result (without gaps) showed a 1.86 % (9 / 484 bp) difference in ITS, 0.25 % (2 / 807 bp) difference in LSU (C. antarctica (WA 0000074564, ex-type) and C. acuminata (MCC 9771, ex-type) have no available SSU and rpb 2 sequences in NCBI and hence cannot be compared).
Morphologically, C. xiangshawanensis differs from C. antarctica and C. acuminata in having brown ascospores with 5 (– 6) transversely septa and 1–2 vertical septa, consisting of 9–14 cells, surrounded by a mucilaginous sheath; while C. antarctica has ascospores with 6–8 transvers septa, consisting of 10–17 cells (Crous et al. 2021); while C. acuminata has dark brown ascospores, with 3–8 transverse septa, 3–5 vertical septa, consisting of 15–21 cells, with a beak-like extension (Mattoo et al. 2023). In addition, our collection is saprobic on dead branches in desert areas in China, while C. antarctica is isolated from soil sample in Antarctica, and C. acuminata was isolated as an endophyte from the stem of Ephedra gerardiana Wall. in India (Mattoo et al. 2023).
Therefore, C. xiangshawanensis is introduced as a new species from China based on morphological and molecular evidence. To provide a better overview of the different morphologies associated with different Comoclathris species, we also compiled ascospore morphology and other ecological data in a table (Table 2).
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Collection code
- GMBCC
- Material sample ID
- GMB-W 1526, GMBCC 2305, GMBCC 2318
- Event date
- 2023-10-01
- Verbatim event date
- 2023-10-01
- Scientific name authorship
- X. G. Tian, T. Y. Du & D. F. Bao
- Kingdom
- Fungi
- Phylum
- Ascomycota
- Order
- Pleosporales
- Family
- Diademaceae
- Genus
- Comoclathris
- Species
- xiangshawanensis
- Taxon rank
- species
- Taxonomic status
- sp. nov.
- Type status
- holotype
- Taxonomic concept label
- Comoclathris xiangshawanensis Tian, Du & Bao, 2026
References
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