Fusicolla gigas C. Liu, Z.Q. Zeng & W.Y. Zhuang, 2022

Liu, Chang, Zhuang, Wen-Ying, Yu, Zhi-He & Zeng, Zhao-Qing, 2022, Two new species of Fusicolla (Hypocreales) from China, Phytotaxa 536 (2), pp. 165-174 : 167-168

Fusicolla gigas C. Liu, Z.Q. Zeng & W.Y. Zhuang , sp. nov. FIGURE 2

Fungal Names: FN570867

Etymology:—Referring to the large-sized macroconidia produced by the fungus.

Typification:— China, Chongqing City, Wushan County, Hongchiba National Forest Park , 31°54′52′′ N, 109°08′56′′ E, in soil, 30 October 2020, Z.Q. Zeng, X.C. Wang, H.D. Zheng & C. Liu, CS25-8 ( CGMCC 3.20680 ) .

Description: —Colonies on PDA reaching 36−39 mm diam. after 2 wk at 25 °C, slimy appearance due to abundant sporulation on medium surface, orange to pale yellow in center, pinkish orange at margin. Colonies on MEA reaching 35−39 mm diam. after 2 wk at 25 °C, surface floccose, with white aerial mycelium, light cinnamon in center. Colonies on SNA reaching 36−38 mm diam. after 2 wk at 25 °C, aerial mycelium absent, sporulation on center medium surface, light yellow to white. Colonies on OA reaching 39−40 mm diam. after 2 wk at 25 °C, aerial mycelium absent with slimy appearance due to abundant sporulation on medium surface, light yellow.

Asexual stage fusarium-like. Conidiophores arising directly from somatic hyphae, simple or rarely branched, monochasial, straight, hyaline, smooth-walled, aseptate or with basal septum, up to 42 µm long. Conidiogenous cells monophialidic or rarely polyphialidic, arising laterally from hyphae or in terminal pairs, cylindrical to subulate, 8−14 × 1.5−3 µm, thin- and smooth-walled. On PDA, macroconidia falcate, long fusiform, slightly narrowing towards the ends, acute, the apical cell often hooked with a more or less pointed tip, basal cell slightly pedicellate, hyaline, thin-and smooth-walled, (1−)3(−4)-septate, (25−)36−42(−53) × 2.5−3.5 µm (av. 39.5 × 2.8 µm) (n = 30), microconidia slightly curved to C-shaped, hyaline, smooth, aseptate, 11–18(−22) × 0.85–1.3 µm (av. 15.7 × 1.1 µm) (n = 20). On OA, macroconidia falcate, generally crescent to threadlike, (3–)4–9-septate, (32−)40–65(−80) × 2.3–3.8 µm (av. 53.2 × 2.9 µm) (n = 30), microconidia strongly curved, hyaline, smooth, 0−4(−5)-septate, (12−)15–24(−32) × 0.85–1.4(−2.2) µm (av. 19.3 × 1.2 µm) (n = 30).

Sexual stage not observed.

Figures

FIGURE 2. Fusicolla gigas (CGMCC 3.20680). a–d. Colonies after 2 wk at 25 °C (a. on PDA, b. on MEA, c. on SNA, d. on OA). e–g. Conidiophores. h, i. Macroconidia and microconidia on PDA. j–n. Macroconidia on PDA. o. Macroconidia and microconidia on OA. p–r. Macroconidia on OA. Scale bars: e–r = 10 μm.