Pseudoxylomyces
Pseudoxylomyces Kaz. Tanaka & K. Hiray., in Tanaka et al., Stud. Mycol. 82: 126 (2015).
Index Fungorum number: IF 811332; Facesoffungi number: FoF 08272, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.
Saprobic on host. Sexual morph: Unknown. Asexual morph: Colonies on natural substratum scattered, dark brown, glistening. Mycelium immersed in agar medium, pale brown to reddish brown. Stromata lacking. Conidiophores branched, septate, brown. Conidiogenesis holoblastic. Conidia broadly fusiform, with several trans-septa of thick-walled, yellowish brown to dark brown with paler end cells. Chlamydospores absent (adapted from Tanaka et al. 2015).
Type species: Pseudoxylomyces elegans (Goh, W.H. Ho, K.D. Hyde & K.M. Tsui) Kaz. Tanaka & K. Hiray.
Notes: Pseudoxylomyces is characterised by pale brown to reddish brown mycelium, septate, brown conidiophores, holoblastic conidiogenesis, and broadly fusiform, thick-walled conidia with several trans-septa. Pseudoxylomyces differs from Xylomyces in that the latter is characterised by absence of conidiophores and conidiogenous cells and production of large, dark, thick-walled, multiseptate, intercalary, narrowly fusiform chlamydospores (Tanaka et al. 2015). Pseudoxylomyces is unique in that it produces broadly fusiform conidia, with several trans-septa holoblastically at the tip of the conidiophores. Pseudoxylomyces is a distinct and well-supported genus in Longipedicellataceae. Molecular markers available for Pseudoxylomyces are ITS, SSU, LSU and TEF-1.
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