Gautieria mianjin Kun L. Yang, Xiao Liu & Zhu L. Yang 2023, sp. nov

Autor: Yang, Kun L., Yang, Zhu L., Zhang, Ming, Wang, Geng-Shen, Liu, Xiao
Rok vydání: 2023
Předmět:
DOI: 10.5281/zenodo.7892366
Popis: Gautieria mianjin Kun L. Yang, Xiao Liu & Zhu L. Yang, sp. nov. (Figs. 1 and 2) Mycobank No.: MB847194 Etymology: —The epithet refers to a kind of traditional Chinese food, named “mianjin”. Mianjin is made from gluten, irregularly subglobose and honeycomb-like in shape, and has a thin film on surface present when raw, easily broken when cooked, sharing a strong resemblance to the basidioma of this fungus. Diagnosis: — Gautieria mianjin is similar and close to G. xinjianensis, but differs from the latter by its subglobose to broadly ellipsoid basidiospores mainly measured 11–14×10–12 μm with 10–14 longitudinal ribs. Type: — China, Gansu Province, Gannan Tibetan Autonomous Prefecture, Lintan County, Yeliguan Town, 34°55′ N, 103°39′ E, on soil in temperate forests dominated by plants of Larix and Picea, altitude 2600 m, October 11, 2022, Xiao Liu 001 (HKAS126926, holotype!; Kun-Long Yang’s private herbarium HTBM0250, isotype!). Basidioma with pleasant aroma, emergent, irregularly subglobose, 2.5–5 cm in diameter. Peridium practically absent. Gleba brain-like to honeycomb-like; tramal plates 400–500 μm thick, milky white (C 4 M 3 Y 2 K 0), slightly gelatinous, covered with sandy yellow (C 0 M 10 Y 50 K 10), earthy yellow (C 10 M 40 Y 70 K 10) to mummy brown (C 0 M 50 Y 70 K 40) spore mass; columella indistinct, very slender and sometimes the same thick as the tramal plates, emanating from the base and frequently branching; locules irregularly shaped, labyrinthine. Basal rhizomorph whitish (C 0 M 1 Y 5 K 0). Basidiospores subglobose to broadly ellipsoid, light brown (C 30 M 40 Y 60 K 0) in KOH, with 10–14 longitudinal ribs, sometimes branching or with cross veins in between, (10) 11–14 (16) [12.24 ± 1.20] × (9.5) 10–12 (13) [10.96 ± 0.77] μm, Q = (1.00) 1.04–1.24 (1.26) and Q m = 1.12 ± 0.07 including ribs, (9) 10–12 (15) [11.53 ± 1.36] × (8) 9–10 (11) [9.33 ± 0.69] μm, Q = (1.05) 1.15–1.33 (1.43) and Q m = 1.23 ± 0.10 excluding ribs; apiculus 1–2 (2.5) [1.88 ± 0.42] × 1.5–2 [1.92 ± 0.24] μm. Basidia not observed. Cystidia not observed. Tramal hyphae composed of 2–8 μm wide interwoven filamentous hyphae, frequently branching, not or slightly gelatinized. Clamps absent in all parts of basidioma. Habitat: —Growing in small groups on soil in temperate forests dominated by trees of Larix and Picea. Currently known from northwestern China (Gansu Province, and probably also Xinjiang Uygur Autonomous Region according to the ITS sequence of “Uncultured fungus” (Fig. 1) in Du et al. 2019).
Published as part of Yang, Kun L., Yang, Zhu L., Zhang, Ming, Wang, Geng-Shen & Liu, Xiao, 2023, Gautieria mianjin (Gomphales, Basidiomycota), a new species of false truffle from China, pp. 119-129 in Phytotaxa 594 (2) on page 123, DOI: 10.11646/phytotaxa.594.2.3, http://zenodo.org/record/7892364
{"references":["Du, H. Y., Chang, S. L., Song, C. C. & Zhang, Y. T. (2019) Diversity of mycorrhizal fungi of Picea schrenkiana forest and its affecting factors in the Tianshan Mountains. Arid Zone Research 36 (5): 1194 - 1201. https: // dx. doi. org / 10.13866 / j. azr. 2019.05.17"]}
Databáze: OpenAIRE
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