Fungalpedia – Note 283, Pseudoascotaiwania


Pseudoascotaiwania Jing Yang, Bhat & K.D. Hyde

Citation when using this entry: Perera et al. 2024 (in prep) – Fungalpedia, genera described in 2016. 

Index FungorumFacesoffungiMycoBankGenBank, Fig. 1

Classification: Fuscosporellaceae, Fuscosporellales, Hypocreomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi

Yang et al. (2016) introduced the monotypic genus Pseudoascotaiwania based on a combined LSU, SSU, and rpb2 phylogeny to accommodate Ascotaiwania persoonii, which clusters distant from the type species of Ascotaiwania (Fallah et al. 1999). Pseudoascotaiwania persoonii is saprobic on twigs in freshwater habitats (Fallah et al. 1999; Yang et al. 2016). The genus is characterized by scattered, immersed, black, urniform, rostrate, and membranous ascomata. Simple septate periphyses lining the beaked ostiolar canal. The peridium is several layers thick and brown with an angularis texture. Paraphyses are simple or branched. The asci are arranged in a broad hymenium. They are unitunicate, cylindrical, 8-spored, persistent with a long stalk and an apical ring that is stained blue in aqueous cotton blue. Ascospores are uniseriate, septate, pale to light brown, and cylindrical to fusoid with acute or rounded ends (Yang et al. 2016). The asexual morph is undetermined.

Type species: Pseudoascotaiwania persoonii (Fallah, J.L. Crane & Shearer) Jing Yang, Bhat & K.D. Hyde

Other accepted species: This genus is monotypic

Figure 1 – Pseudoascotaiwania persoonii (ILLS 52298, holotype). a Median longitudinal section through ascoma. b Peridium. c Paraphyses. d Ascus. e Apical ring. f Ascospores. Scale bars: a, b = 100 μm, c, e, f = 25 μm, d = 50 μm. Redrawn from Fallah et al. (1999).



Fallah PM, Crane JL, Shearer CA. 1999 – Freshwater ascomycetes: two new species of Ascotaiwania from North America. Canadian Journal of Botany 77, 87–92. 

Yang J, Maharachchikumbura SS, Bhat DJ, Hyde KD et al. 2016 – Fuscosporellales, a new order of aquatic and terrestrial Hypocreomycetidae (Sordariomycetes). Cryptogamie, Mycologie 37, 449–475.


Entry by

Rekhani Hansika Perera, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand.


(Edited by Kevin D. Hyde, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka)


Published online 28 May 2024