Quixadomyces
Quixadomyces Cantillo & Gusmão, in Crous et al., Persoonia 40: 317 (2018).
Index Fungorum number: IF 824358; Facesoffungi number: FoF 08325, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.
On natural substrate. Sexual morph: Unknown. Asexual morph: Mycelium superficial or somewhat immersed in the substrate, composed of warty, sinuous, crisscrossed or stringing, verrucose or verruculose, brown, septate hyphae. Stroma composed of tightly clustered and fused hyphae. Conidiophores absent. Conidiogenous cells absent. Propagules rising up directly from interwoven hyphal strands, often globose to subglobose, ovoid to pyriform during development, but may become, ellipsoid-fusoid to obclavate, wall consisting on anastomosed brown to dark olivaceous brown hyphae, textura epidermoidea similis, with some peripheral hyphae around propagule body, smooth or warty, approached at the tip (adapted from Crous et al. 2018).
Type species: Quixadomyces cearensis Cantillo & Gusmão
Notes: Quixadomyces is characterised by superficial or somewhat immersed mycelium in the substrate, propagules rising up directly from interwoven hyphal strands generally globose to subglobose with the wall consisting of anastomosed brown to dark olivaceous brown hyphae, textura epidermoidea similis. Quixadomyces is similar to Akenomyces but the latter has black elliptical-lenticular sclerotia, with pale warty marginal hyphae, brown, consisting of a complex three-layer hyphal structure and, inside the cortex, a firmly interlaced mass of hyaline, thin-walled, branched hyphae which is lacking in Quixadomyces (Hornby 1984). Akenomyces belongs to the phylum Basidiomycota while Quixadomyces belongs to Ascomycota. Akenomyces also resembles Megacapitula in having ovoid to obclavate propagules but the latter has integrated or terminal conidiogenous cells and conidia have a beak-like structure. The ideal molecular marker to differentiate species of Quixadomyces is ITS and LSU. Quixadomyces is morphologically and phylogenetically a well-segregated genus in Parapyrenochaetaceae. Molecular markers available for Quixadomyces are ITS, SSU, BTUB, RPB2 and TEF-1.
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