Exophiala yunnanensis Z.F. Yu & R.L. Lv, 2022

Lv, Ruili, Yang, Xiaoqian, Qiao, Min, Fang, Linlin, Li, Jianying & Yu, Zefen, 2022, Exophiala yunnanensis and Exophiala yuxiensis (Chaetothyriales, Herpotrichiellaceae), two new species of soil-inhabiting Exophiala from Yunnan Province, China, MycoKeys 94, pp. 109-124 : 109

Exophiala yunnanensis Z.F. Yu & R.L. Lv sp. nov.

Fig. 3

Etymology.

yunnanensis, pertaining to Yunnan, a province of southwest China from where the type was collected.

Description.

Colonies on CMA medium after 7 days with hyphae olive green, smooth, septate, thin walled, branched, 1.6-3.0 µm wide. Conidiogenous cells slightly differentiated from simple or branched vegetative hyphae, terminal or intercalary, flask-shaped, ovoid to elongate, pale brown, loci at tips and lateral; annellated zones inconspicuous or occasionally finely fimbriate, often inserted on intercalary cells. Conidia aseptate, ellipsoidal, cylindrical or allantoid, 1-2 guttulate, smooth, brown, 2.9-4.8 × 1.8-3.3 µm, with a conspicuous scar of approx. 1 µm wide at the base, containing no evident or few small oil drops.

Culture characteristics.

Colonies on PDA medium, at 25 °C, were slow-growing, mycelium immersed and partly superficial, irregular, umbonate, surface olivaceous-grey to black. Radial growth rates were 0.8-0.9 mm day-1on PDA. Colonies on CMA medium were restricted, mycelium immersed and partly superficial, effuse, cottony, reverse olivaceous-buff to olivaceous, reaching 12 mm diam. in 15 days at 25 °C.

Type.

China. Yiliang County, Yunnan Province, isolated from soil of rocky desertification area, 24°96'N, 102°66'E, ca. 1886 m elev., Oct 2020, Z.F.Yu, preserved by lyophilisation (a metabolically-inactive state) in State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan (holotype YMFT 1.06739), ex-holotype live culture: YMF 1.06739; CGMCC 3.16095; GDMCC 3.725; JCM 39339 .

Figures

Figure 3. Exophiala yunnanensis (YMFT 1.06739, holotype) A colony on PDA after 14 days B colony on CMA after 14 days C-G conidiogenous cells H conidia and budding cells. Scale bars: 3.2 cm (A, B); 10 µm (C-H).