Cladosporium perangustum Bensch, Crous & U. Braun, Studies in Mycology 67: 65 (2010)

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

Cladosporium perangustum Bensch, Crous & U. Braun, Studies in Mycology 67: 65 (2010)

Fig. 5a-h

Material examined.

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 401.6, living culture GUCC 401.6) (new substrate record) .

Description.

Saprobic on fallen leaves of Eucommia ulmoides . Sexual morph: Not developed. Asexual morph: Hyphomycetous. Mycelium superficial, hyphae branched, hyaline to subhyaline, 2.5-5 μm wide, usually slightly constricted at the septa and somewhat swollen, smooth to somewhat verruculose or irregularly rough-walled. Conidiophores macro- and micronematous, 14-167 × 2.5-4.5 µm (x̄ = 65.4 × 3.4 µm; n = 20), erect, branched, slightly attenuated towards the apex, light olive-green, smooth and thick-walled. Conidia in acropetal chains, 2-9.5 × 2-4 µm (x̄ = 5.6 × 3.3 µm; n = 30) mostly light olive-green, aseptate, mostly smooth-walled and thin-walled, variable in size and shape, subglobose, ellipsoid-ovoid, obovoid, fusiform. Secondary ramoconidia 6-24 × 2-5.5 µm (x̄ = 11.2 × 3.3 µm; n = 30), olive-green, narrowly ellipsoid to cylindrical-oblong, subcylindrical, aseptate, rarely 1-septate, mostly smooth-walled and thick-walled.

Culture characteristics.

Colonies on SNA 30-40 mm diam, after 2 weeks at 25 °C, pale olive to pale whitish, flat, velvety, with a regular edge, reverse light olive to light white. Colonies on PDA 30-40 mm diam, after 2 weeks at 25 °C, olive-gray to olive-green or olive-brown, powdery or flocculent, fluffy, regular, radially furrowed, lacerated or feathery, and often forming a gray-white or olive bulge in the colony kernel; reverse dark olive or dull green to black. Colonies on MEA 35-45 mm diam, after 2 weeks at 25 °C, gray-green to white or gray-white, fluffy, radially furrowed, with a whitish final edge; reverse olive-yellow to olive-gray to olive-green, with a whitish final edge. Colonies on OA 35-45 mm diam, after 2 weeks at 25°C, white to olive-green, with a pale gray final edge, velvety or fluffy, margins colorless or pale gray, glabrous, regular; reverse olive-green to dark green.

GenBank numbers.

ITS: OL579742, tef1: OL581726, act: OL519779.

Figures

Figure 5. Cladosporium perangustum (GUCC 401.6, new substrate record from Guizhou Province). 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: 50 µm (e); 10 µm (f-h).