Cladosporium eucommiae S.Y. Wang, Yong Wang bis & Y. Li, 2022

Wang, Si-Yao, Wang, Yong & Li, Yan, 2022, Cladosporium spp. (Cladosporiaceae) isolated from Eucommia ulmoides in China, MycoKeys 91, pp. 151-168 : 151

Cladosporium eucommiae S.Y. Wang, Yong Wang bis & Y. Li sp. nov.

Fig. 3a-h

Etymology.

eucommiae, in reference to the genus name of the host plant ( Eucommia ulmoides ), from which the fungus was isolated.

Type.

China, Guizhou Province, Guiyang, Huaxi district , plantation forest of E. ulmoides , Guizhou University (26°24'16"N, 106°40'29"E), on fallen leaves of E. ulmoides , S.Y. Wang, Y. Wang & Y. Li, 13 January 2021 (HGUP 401.1, holotype; ex-type living culture GUCC 401.1; additional living culture GUCC 401.9) .

Description.

Saprobic on fallen leaves of Eucommia ulmoides . Sexual morph: Not developed. Asexual morph: Hyphomycetous. Mycelium abundant, superficially and submerged, overgrowing whole culture dishes, thin to dense, hyphae straight to slightly sinuous, branched, light olive-green to olive-brown, 1.5-5 µm wide, thin-walled, smooth. Conidiophores (7-)22-198 × 2.5-4.5 µm (x̄ = 77.2 × 3.3 µm; n = 20), erect, branching, slightly attenuated towards the apex, light olive-green, smooth and thick-walled. Conidia 3-9 × 2.5-4.5 µm (x̄ = 5.6 × 3.3 µm; n = 30), in simple and branched acropetal chains, mostly light olive, aseptate, smooth-walled and thin-walled, variable in size and shape, subglobose, ellipsoid-ovoid, obovoid, fusiform, subcylindrical. Secondary ramoconidia 5-25 × 2.5-4.0 µm (x̄ = 11.9 × 3.4 µm; n = 30), olive-green, ellipsoid-ovoid, obovoid, fusiform, subcylindrical, aseptate, smooth-walled and thin-walled, rarely thick-walled.

Culture characteristics.

Colonies on SNA 35-45 mm diam, after 2 weeks at 25 °C, pale olive, flat, velvety, with a regular edge, reverse light olive. Colonies on PDA 30-45 mm diam, after 2 weeks at 25 °C, olive-brown to gray-olive to iron-gray, with a regular white edge, irregularly folded, slightly depressed at the center, thatched, and often forming a bulge in the colony kernel, reverse olive to dark olive, with a whitish final edge. Colonies on MEA 35-45 mm diam, after 2 weeks at 25 °C, gray-green to olive, less radially furrowed, velvety, with an even gray white edge, reverse olive to dark olive, with an even gray-green final edge. Colonies on OA 35-40 mm diam, after 2 weeks at 25 °C, olive to gray-green, white at the final edge, flat, velvety, margin regular; reverse dark green to black, with a whitish final edge.

GenBank numbers.

ITS: OL587465, tef1: OL504966, act: OL519775 (GUCC 401.1); ITS: ON334729, act: ON383337 (GUCC 401.9).

Figures

Figure 3. Cladosporium eucommiae (GUCC 401.1, ex holotype strain). a-d colonies on SNA, PDA, MEA and OA (left: above, right: reverse) e branching conidiophore, secondary ramoconidia and conidia on SNA f-h conidiogenous cells, secondary ramoconidia and conidia on SNA. Scale bars: 10 µm (e-h).