Neoxylomyces M.S. Calabon, Boonmee, E.B.G. Jones & K.D. Hyde, in Calabon, Jones, Boonmee, Doilom, Lumyong & Hyde, Journal of Fungi 7(2, no. 117): 14 (2021)

Index Fungorum number: IF 838554; MycoBank number: MB 838554; Facesoffungi number: FoF 09533;

Etymology – referring to the similarity to the genus Xylomyces

Saprobic on decaying wood submerged in freshwater habitats. Sexual morph: Undetermined. Asexual morph: Colonies on the substrate effuse, scattered, dark brown to black. Mycelium mostly immersed, composed of branched, septate, smooth, thin-walled, dematiaceous, anastomosing hyphae. Conidiophores and conidia not developed. Chlamydospores narrowly fusiform, cylindrical, intercalary, erect, mostly straight, slightly curved, solitary or in chains, occasionally branched, multiseptate, constricted at septa, brown, paler end cells, thick-walled with scarce irregular longitudinal striations.

Type species: Neoxylomyces multiseptatus M.S. Calabon, Boonmee, E.B.G. Jones &K.D. Hyde

Notes:Neoxylomyces is similar to Xylomyces in having brown, thick-walled, multi-septate chlamydospores [14,48]. The latter, typified by X. chlamydosporus, is placed in Aliquandostipitaceae while Neoxylomyces clustered with other taxa of Phyllachorales with 100% ML, 1.00 BYPP support (Figure 7). In multi-loci phylogenetic analyses, Neoxylomyces shared the same clade with Clathrosporium retortum (CCIBt 4122; CCIBt 4123) with 100% ML, 1.00 BYPP support.

Figure 7. Neoxylomyces multiseptatus (MFLU 21–0014, holotype). (a) Host; (be) colonies on wood; (fl) chlamydospores; (m) germinated chlamydospore; (n) culture on MEA. Scale bars: (a) 10 mm; (b,c) 500 µm; (d) 100 µm; (em) 50 µm.