Fungalpedia – Note 305, Rubellisphaeria


Rubellisphaeria Réblová & J. Fourn.

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

Index FungorumFacesoffungiMycoBankGenBank, Fig. 1

Classification: Incertae sedis, Incertae sedis, Sordariomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi

Réblová et al. (2016) introduced the monotypic genus Rubellisphaeria to accommodate Rubellisphaeria abscondita based on LSU-SSU phylogeny. Rubellisphaeria abscondita was isolated from a submerged coniferous wood in a stream (Réblová et al. 2016). The genus is characterized by perithecial ascomata that are astromatic, immersed to semi-immersed, subhyaline to dark reddish brown and subglobose with a lateral neck and periphysate ostiole. The ascomatal wall consists of two layers and is leathery to waxy in texture. Paraphyses are abundant, persistent and septate. Asci are unitunicate, 8-spored, stipitate and have a nonamyloid apical annulus in the apex. Ascospores of the Rubellisphaeria are ellipsoidal, transversely septate, hyaline and thin-walled. The asexual morph remains undetermined (Réblová et al. 2016). The genus is phylogenetically closely related to Atractospora. However, Rubellisphaeria differs from Atractospora by ascomatal morphology and ellipsoidal ascospores having a delayed development of the middle septum (Réblová et al. 2016). 

Type species: Rubellisphaeria abscondita Réblová & J. Fourn.

Other accepted species: This genus is monotypic.

Figure 1 – Rubellisphaeria abscondita (PRM 934681, holotype). a Ascomata on decorticated wood. b Paraphyses. c Asci. d Apical annulus. e, f Ascospores. Scale bars: a = 200 μm, b–f = 10 μm. Redrawn from Réblová et al. (2016).



Réblová M, Fournier J, Štěpánek V. 2016 – Two new lineages of aquatic ascomycetes: Atractospora gen. nov. and Rubellisphaeria gen. et sp. nov., and a sexual morph of Myrmecridium montsegurinum sp. nov. Mycological Progress 15, 1–8.


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 8 July 2024