Readerielliopsis
Readerielliopsis Crous & Decock, in Crous et al., Persoonia 34: 195 (2015).
Index Fungorum number: IF 812436; Facesoffungi number: FoF 01736, 2 morphological species (Species Fungorum 2022), 2 species with molecular data.
Saprobic on decaying leaf of an angiosperm. Sexual morph: Unknown. Asexual morph: Mycelium consisting of brown, smooth, branched, septate hyphae, constricted at septa, cells frequently guttulate. Conidiomata pycnidial, arising from superficial mycelium; pycnidia brown, subglobose to pyriform, aggregated, somewhat papillate, ostiolate, mostly with single, central ostiole, rarely with 1–2 lateral ostioles, unilocular, exuding a brown conidial mass. Conidiophores reduced to conidiogenous cells lining the inner cavity. Conidiogenous cells pale brown, subglobose, phialidic, apex with visible minute collarette. Conidia solitary, brown, smooth, globose to clavate or obdeltoid, with three bluntly rounded ends, mostly straight, but sometimes somewhat curved (adapted from Crous et al. 2015).
Type species: Readerielliopsis fuscoporiae Crous & Decock
Notes: Readerielliopsis is unique in having deltoid conidial projections. Readerielliopsis differs from Readeriella in having phialidic conidiogenesis, and aggregated, somewhat papillate conidiomata compared to the phialides with percurrent proliferation, and separate, apapillate conidiomata in Readeriella. Readerielliopsis is reported to have Cibiessia and Nothostrassia synasexual morphs, and teratosphaeria-like sexual morphs (Crous et al. 2009a, b). Molecular markers available for Readerielliopsis are LSU, ITS, RPB2 and TEF-1.
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