Fungalpedia – Note 2451, Pseudoxylomyces
Pseudoxylomyces. Kaz. Tanaka & K. Hiray.
Citation when using this data: Dong W et al. 2020 – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Figs 1,2
Classification: Longipedicellataceae, Pleosporales, Pleosporomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Saprobic on submerged wood. Sexual morph: Undetermined. Asexual morph: Colonies on natural substratum, scattered to gregarious, dark brown to black, glistening. Mycelium mostly immersed, pale brown to reddish brown. Stromata lacking. Conidiophores septate, brown, branched or not developed. Conidiogenous cells holoblastic. Conidia single, broadly fusiform or ellipsoidal, straight, with several transverse septa of thick-walled, yellowish brown to dark brown, with paler end cells, without sheath or appendages (Tanaka et al. 2015).
Notes: Pseudoxylomyces was proposed to accommodate Xylomyces elegans Goh et al., which was isolated from submerged wood in Australia (Goh et al. 1997; Tanaka et al. 2015). Xylomyces is characterized as lacking conidiophores and conidiogenous cells, but has large chlamydospores (Goos et al. 1977; Goh et al. 1997). In contrast, Pseudoxylomyces is quite distinctive in producing broadly fusiform conidia at the tip of the conidiophores (Tanaka et al. 2015). One new species P. aquaticus is introduced in Pseudoxylomyces.
Type species: Pseudoxylomyces elegans (Goh, W.H. Ho, K.D. Hyde & C.K.M. Tsui) Kaz. Tanaka & K. Hiray.
Other accepted species: Species Fungorum – search Pseudoxylomyces.
Figure 1 – Pseudoxylomyces elegans (MFLU 17-1712). a–c Colonies on submerged wood. d Conidiophore bearing conidium. e–k Conidia. l Germinated conidium. m, n Colony on PDA (left-front, right-reverse). Scale bars: d = 20 μm, e–k = 50 μm, l = 100 μm.
Figure 2 – Pseudoxylomyces elegans (MAFF 243852 = KT 2887). a, b Asexual morph produced on agar medium. c Conidiophores and conidia. d, e Conidia. Scale bars: a = 1 mm, b = 200 µm, c = 100 µm, d, e = 20 µm.
References
Entry by
Wei Dong, Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming 650500, China, Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand, Innovative Agriculture Research Center, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Institute of Plant Health, Zhongkai University of Agriculture and Engineering, Haizhu District, Guangzhou 510225, China
Published online 22 May 2026