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

Fig. 4a-h

Etymology.

guizhouense, in reference to the type location (Guizhou Province), where the fungus was isolated.

Type.

China, Guizhou Province, Guiyang, Huaxi district , plantation forest of Eucommia 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 401.6, holotype; living culture GUCC 401.7; additional living culture GUCC 401.8) .

Description.

Saprobic on fallen leaves of Eucommia ulmoides . Sexual morph: Not developed. Asexual morph: Hyphomycetous. Mycelium abundant, submerged, overgrowing whole culture dishes, hyphae straight to slightly sinuous, septate, branching, light olive-green to olive-brown, mostly smooth- and thin-walled, 1.5-6 µm wide. Conidiophores 13-100 × 3-4.5 µm (x̄ = 60.8 × 3.5 µm; n = 10), erect, branching, light olive-green, smooth- and thin-walled. Conidia 3-7.5 × 2.5-4 µm (x̄ = 4.8 × 3.1 µm; n = 30), in simple and branched acropetal chains, mostly light olive, aseptate, mostly smooth- and thin-walled, variable in size and shape, ellipsoid-ovoid, obovoid, fusiform. Secondary ramoconidia 6.5-23 × 3-5.5 µm (x̄ = 11.3 × 4.1 µm; n = 30), pale olive-green, narrowly ellipsoid to cylindrical-oblong, subcylindrical, aseptate, smooth- and thin-walled.

Culture characteristics:

Colonies on SNA 45-55 mm diam, after 2 weeks at 25 °C, pale olive, flat, velvety, margin regularly, reverse light olive. Colonies on PDA 40-50 mm diam, after 2 weeks at 25 °C, smoke-gray to light olive-gray, reverse leaden-gray, gray-olive at edge both surface and reverse, woolly or felty, broad edge, regular, growth low convex, without protuberant exudates, reverse formed cracks in the middle small circle. Colonies on MEA 30-40 mm diam, after 2 weeks at 25 °C, smoke-gray to light olive-gray, woolly or felty, fluffy, with a whitish narrow final edge; reverse olive-yellow or olive-brown, radially furrowed, irregularly folded, with a whitish narrow final edge. Colonies on OA 30-45 mm diam, after 2 weeks at 25 °C, gray-green or olive, granular and fluffy mycelium, woolly and felty edge, with an irregularly folded whitish and olive final edge; reverse olive-yellow or olive-brown, with a whitish narrow final edge.

GenBank numbers.

ITS: OL579741, tef1: OL504965, act: OL519780 (GUCC 401.7); ITS: ON334728, tef1: ON383470, act: ON383338 (GUCC 401.8).

Figures

Figure 4. Cladosporium guizhouense (GUCC 401.7). a-d colony on SNA, PDA, MEA and OA (left: above, right: reverse) e-h conidiogenous cells, secondary ramoconidia and conidia on SNA. Scale bars: 10 µm (e-h).