Geotrichum hubeiense L. C. Guo, H. Y. Zhu, P. J. Han & F. Y. Bai 2025, sp. nov.
Creators: name: Zhu, Hai-Yan
name: Wei, Yu-Hua
name: Guo, Liang-Chen
name: Wen, Zhang
name: Hu, Shuang
name: Wang, Di-Qiang
name: You, Xiao-Long
name: Fan, En-Di
name: Yao, Shang-Jie
name: Bai, Feng-Yan
name: Han, Pei-Jie
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Fungi
Ascomycota
Saccharomycetes
Saccharomycetales
Dipodascaceae
Geotrichum
Geotrichum hubeiense

description: Geotrichum hubeiense L. C. Guo, H. Y. Zhu, P. J. Han & F. Y. Bai sp. nov.
Fig. 2
Etymology.
The species is named after the location “ Hubei Province, China, ” where the type strain of the species was collected.
Holotype.
China • Hubei Province, Enshi City, Xianfeng County, from a bark sample, on July 7, 2023, L. C. Guo, (holotype CGMCC 2.7499 T, permanently preserved in a metabolically inactive state, ex-holotype JCM 36896 = 2-17-ESXF-26-1).
Description.
Culture characteristics: After 10 days on YPD agar at 30 ° C, colonies are 22 mm in diameter, flesh colour, flat, dry, with finely hairy and regular margins (Fig. 2 A). Hyphae soon disarticulate into cubic arthroconidia measuring 2.1–5.2 × 3.8–9.8 μm (Fig. 2 B-C). Hyphae and arthroconidia produce oblong blastoconidia measuring 2.9–6.8 × 5.2–17.2 μm, which were observed on PDA and YCB agar after one month at 25 ° C (Fig. 2 D). Sexual structures were not observed on YCB, PDA, V 8, YM, and CMA agar. Physiological and biochemical characteristics: Glucose is not fermented. Glucose, D-galactose, L-sorbose, D-xylose, ethanol, glycerol, D-mannitol, D-glucitol, DL-lactic acid, succinic acid (weak), and citric acid (weak) are assimilated as sole carbon sources. Trehalose, ribitol, sucrose, D-maltose, cellobiose (slow), lactose, melibiose, raffinose, melezitose, inulin, starch soluble, L-arabinose, D-arabinose, D-ribose, L-rhamnose, D-glucosamine, methanol, erythritol, galactitol, α-methyl-D-glucoside, salicin, D-glucuronic acid, inositol, hexadecane, N-acetyl-D-glucosamine, and xylitol are not assimilated as sole carbon sources. Ethylamine, cadaverine, ammonium sulfate, L-lysine, potassium nitrate (late), and sodium nitrite (weak) are assimilated as sole nitrogen sources. Urease activity is negative. Diazonium Blue B reaction is negative. Extracellular starch compounds are not produced. No growth occurs in 10 % (w / v) sodium chloride plus 5 % (w / v) glucose medium. Growth occurs on 60 % (w / v) glucose-yeast extract agar. Growth in vitamin-free medium is positive. Growth occurs on YPD agar at 35 ° C, but not at 37 ° C.
Materials examined.
China • Hubei Province, Enshi City, Xianfeng County, from a bark sample, in July 2023, L. C. Guo, living culture 2-25-ESXF-26-2 = CGMCC 2.7418 = JCM 36897.
Notes.
Physiologically, G. hubeiense sp. nov. differs from its closely related species, G. carabidarum and G. histeridarum, in its ability to assimilate D-galactose and grow on 60 % (w / v) glucose-yeast extract agar.
description: Published as part of Zhu, Hai-Yan, Wei, Yu-Hua, Guo, Liang-Chen, Wen, Zhang, Hu, Shuang, Wang, Di-Qiang, You, Xiao-Long, Fan, En-Di, Yao, Shang-Jie, Bai, Feng-Yan & Han, Pei-Jie, 2025, Two new arthroconidial yeast species from bark and pit mud in China, pp. 57-72 in MycoKeys 113 on pages 57-72, DOI: 10.3897/mycokeys.113.141799