Davidiellomyces
Davidiellomyces Crous, in Crous et al., Persoonia 38: 251 (2017).
Index Fungorum number: IF 820929; Facesoffungi number: FoF 06630, 2 morphological species (Species Fungorum 2022), 2 species with molecular data.
Saprobic on host. Sexual morph: Ascomata pseudothecial, on dead leaves, amphigenous, black, subepidermal, globose. Ostiole apical. Peridium consisting of 2–3 layers of medium brown textura angularis. Asci aparaphysate, fasciculate, bitunicate, subsessile, obovoid to broadly ellipsoid, straight to slightly curved, 8-spored. Ascospores multiseriate, overlapping, hyaline, prominently guttulate with angular inclusions, thick-walled, straight, fusoid-ellipsoidal with obtuse ends, widest above septum, medianlyuniseptate; enclosed in a mucoid sheath (also visible inside asci), and becoming brown and verruculose in older asci. Asexual morph: Unknown (adapted from Crous et al. 2017).
Type species: Davidiellomyces australiensis Crous
Notes: Davidiellomyces is characterised by amphigenous, black, subepidermal, globose ascomata, obovoid to broadly ellipsoid asci, and hyaline, fusoid-ellipsoidal ascospores with obtuse ends. Davidiellomyces resembles Cladosporium s. str.in having ascospores with angular inclusions which is a conserved character in the Cladosporiaceae. In the phylogenetic analyses of Crous et al. (2017), Davidiellomyces clustered with the genus Toxicocladosporium s. str. but was not congeneric with the genus. Davidiellomyces is morphologically and phylogenetically a well-supported genus in Cladosporiaceae. Molecular markers available for Davidiellomyces are LSU, ITS, actin (actA).
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