Pseudocoronospora
Pseudocoronospora Z.F. Yu, M. Qiao & R.F. Castañeda, in Zheng et al., Antonie van Leeuwenhoek: 10.1007/s10482-021-01688-3, 6 (2022).
Index Fungorum number: IF 840431; Facesoffungi number: FoF 11945, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.
Saprobic on host. Sexual morph: Unknown. Asexual morph: hyphomycetous. Conidiophores macronematous, mononematous, erect, septate, unbranched, brown. Conidiogenous cells polyblastic, denticulate, integrated, sympodial extended, terminal, indeterminate. Conidial secession rhexolytic. Conidia solitary, acropleurogenous obclavate, crowned, with mammiform protuberances arranged near the apex; septate, smooth or verruculose, hyaline, fringed at the base (adapted from Zheng et al. 2021).
Type species: Pseudocoronospora hainanense Z.F. Yu, M. Qiao & R.F. Castañeda
Notes: Pseudocoronospora is characterised by macronematous, mononematous, erect conidiophores, polyblastic, denticulate, integrated conidiogenous cells, rhexolytic conidial secession and acropleurogenous obclavate, crowned conidia. Pseudocoronospora differs from Coronospora in having small conidiogenous loci with noticeable denticles and fringed conidial basal cells while the latter genus has cicatrized loci formed by sympodial extensions of the polyblastic conidiogenous cells and schizolytic conidial secession (Zhang and Zhang 2004). Matsushima (2001) reported that Coronospora is the asexual state of Ascoronospora but this was not confirmed by molecular data. Ascoronospora is placed in Pleosporales genera incertae sedis but is morphologically different from members of Microthyriaceae (Wijayawardene et al. 2018). In the phylogenetic analysis of Zheng et al. (2021) based on LSU and ITS sequences, Pseudocoronospora was phylogenetically related to the asexual genus Hamatispora and Neoanungitea. Pseudocoronospora differs from Hamatispora in that the latter has staurospores that are hook-shaped with 3 arms rising from each cell on the helicoid part (Yen et al. 2018; Zheng et al. 2021). Pseudocoronospora has completely different morphology from Neoanungitea, which has erect, subcylindrical, flexuous, dark brown macroconidiophores, terminal, subcylindrical, conidiogenous cells, and fusoid-ellipsoid conidia. Pseudocoronospora is morphologically and phylogenetically a distinct and well-defined genus in Microthyriaceae. Molecular markers available for Pseudocoronospora include ITS and LSU.
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