Humicola koreana Hyang B. Lee & T.T.T. Nguyen, sp. nov.
MycoBank number: MB 814402, Facesoffungi number: FoF 02068, Fig. 1
Etymology – koreana. Referring to the country which from the species was first isolated (Korea)
Holotype – EML-UD33-1
Colonies of strain grow slowly on potato dextrose agar (PDA), initially nearly buff and then changing to luteus, reaching 59 – 61 mm in diam. at 25 °C after 7 days of incubation. The reverse of colonies is yellow in the center with a lighter margin and irregular zonation. Conidia are formed laterally, the shapes are commonly round, ovovoid to some ellipsoid, and measure 8 – 10.7 μm in diam. The conidia have outwardly melanized thick wall layers. At maturity, conidia are detached from the conidiophores having scars.
Notes – Humicola koreana is morphologically similar to H. fuscoatra and H. grisea, but differs from the related species in having smaller spores and producing yellow pigment when cultivated on PDA.
Material examined – REPUBLIC OF KOREA, from a soil sample from Ulleung-do island; EML-UD33-1 (EML-UD33-1, holotype a dried culture, stored at Division of Food Technology, Biotechnology & Agrochemistry, College of Agriculture & Life Sciences, Chonnam National University, Gwangju 61186, Korea) ex-type living culture at the Culture Collection of National Institute of Biological Resources (NIBR), Incheon, preserved as glycerol stock at –80 °C in the CNUFC and deposited at Jena Microbial Resource Collection (University of Jena and Leibniz Institute for Natural Product Research and Infection Biology, Jena, Germany) (JMRC:SF:012183).
Fig. 1 Humicola koreana (holotype) a, b Yellow colonies in potato dextrose agar (a from above, b from below) c – f, I – l Two different types of conidiophores (white arrows) and aleuriconidia, vase-shaped conidiophore c Column-shaped conidiophore e Ground to obovoid conidia with scar (purple arrow) and thick wall layer h Scar on the conidiophore after detachment (yellow arrow). Scale bars: c – h = 20 μm, i, k = 10 μm, j, l = 15 μm.