Hongkongmyces
Hongkongmyces C.C.C. Tsang, J.F.W. Chan, Trend. -Sm., A.H.Y. Ngan, I.W.H. Ling, S.K.P. Lau & P.C.Y. Woo, Medical Mycol. 52(7): 740 (2014).
Index Fungorum number: IF 805515; Facesoffungi number: FoF 08269, 8 morphological species (Species Fungorum 2022), 8 species with molecular data.
Parasitic on biopsy tissues of an infected foot of a patient or saprobic on submerged wood. Sexual morph: Ascomata immersed to semi-immersed, scattered or gregarious, subglobose, coriaceous, dark brown to black, with papilla. Peridium composed of several layers of dark brown cells of textura epidermoidea or textura angularis. Pseudoparaphyses numerous, trabeculate, filiform, hyaline, septate, branched. Asci 8-spored, bitunicate, fisitunicate, cylindric-clavate, pedicellate. Ascospores overlapping biseriate, broad-fusiform, sometimes tapering towards the ends, hyaline, septate, surrounded with mucilaginous sheath (Hyde et al. 2017). Asexual morph: Coelomycetous. Conidiomata pycnidial, globose to ampulliform or ellipsoidal, dark brown to black, with a central ostiole to multiple ostioles. Peridium two-layered, or sometimes poorly developed and thinner at the base. Conidiophores reduced. Conidiogenous cells phialidic, sometimes with sympodial proliferations, discrete, subulate to ampulliform or subcylindrical, hyaline, smooth. Conidia white in mass, hyaline, solitary, ellipsoid to obovoid, globose, subglobose, lacking mucilaginous sheath (adapted from Dong et al. 2020).
Type species: Hongkongmyces pedis C.C.C. Tsang et al.
Notes: Hongkongmyces is characterised by grey, velvety colonies, septate grey hyphae and sterile mycelia without production of conidia. In the phylogenetic analyses of Tsang et al. (2014), Hongkongmyces forms a unique branch, not closely related to other fungal species. Hongkongmyces is a distinct genus accommodated in Lindgomycetaceae. Molecular markers available for Hongkongmyces include LSU, SSU, ITS, BTUB, RPB2 and TEF-1.
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