Fungalpedia – Note 2746, Flabellascus
Flabellascus. Réblová.
Citation when using this data: Huang SK et al. 2021 – Fungalpedia.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1
Classification: Calosphaeriaceae, Calosphaeriales, Diaporthomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Saprobic on wood. Sexual morph: Ascomata perithecial, immersed to semi-immersed, subglobose, ostiolate, with elongate necks, periphysate. Peridium coriaceous to membranaceous, composed of brown to hyaline cells of textura angularis to textura prismatica. Paraphyses numerous, broad, cylindrical, septate, tapering, longer than the asci. Ascogenous hyphae discrete, hyaline, smooth-walled, elongate, branched, with ellipsoidal to obpyriform cells, growing in sympodial succession, in dense clusters and each giving rise to an ascus. Asci 8-spored, unitunicate, clavate, pedicellate, thickened at the apex. Ascospores bi-seriate to overlapping in the upper part of ascus, hyaline, allantoid to ellipsoidal, smooth-walled, aseptate. Asexual morph: Hyphomycetous. Conidiophores macronematous to semi-macronematous, brown, unbranched or branched, with terminate in a single or multiple verticillate phialide(s). Phialides ampulliform to elongate-ampulliform, hyaline to pale brown, tapering. Conidia aggregated, hyaline, aseptate, allantoid to reniform (adapted from Réblová et al. 2015).
Notes: Flabellascus is monotypic. Its sexual morph is similar to Jattaea and different asexual morphs distinguish them. The former has macronematous and branched conidiophores, whereas the latter generally has micronematous and unbranched conidiophores (Réblová et al. 2015). In our study, Flabellascus is sister to Togniniella in Calosphaeriaceae (100%ML/1.00PP).
Type species: Flabellascus tenuirostris Réblová, in Réblová, Jaklitsch, Réblová & Štěpánek, PLoS ONE 10(12): e0144616, 15 (2015).
Other accepted species: Species Fungorum – search Flabellascus.
Figure 1 – Flabellascus tenuirostris: a, b (redrawn from Réblová et al. 2015). a Asci link with ascogenous hyphae and paraphyses. b Conidiophores with conidia; Kacosphaeria antarctica: c–e (redrawn from Arambarri et al. 2020). c Asci with paraphyses. d Ascospores. e Ascomata. Scale bars: a–d = 10 µm, e = 200 µm.
References
Entry by
Shi-Ke Huang, State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China, The Engineering Research Center of Southwest Bio-Pharmaceutical Resources, Ministry of Education, Guizhou University, Guiyang 550025, Guizhou Province, China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand, The Mushroom Research Centre, Guizhou University, Guiyang 550025, China
Published online 18 June 2026