Fungalpedia – Note 300, Katherinomyces


Katherinomyces Khodos

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

Index Fungorum, Facesoffungi, MycoBankGenBank, Fig. 1

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

Katherinomyces cetrariae is a lichenicolous species associated with Cetraria aculeate (Khodosovtsev et al. 2016). Khodosovtsev et al. (2016) incorrectly published the names Katherinomyces and K. cetrariae since the provided MycoBank identifier was for the genus and no identifier had been obtained for the species. Later, Khodosovtsev et al. (2018) validated the names by providing MycoBank identifiers for the species and the genus. The genus is characterized by light brownish, immersed vegetative hyphae. Conidiomata are stromatic with brownish walls. Conidiophores are brown, short and poorly developed. Conidiogenous cells are broadly ellipsoid, bacilliform or polygonal and brown. Katherinomyces produces holoblastic conidia that are aseptate and irregular in shape, bacilliform, broadly ellipsoid, ovoid or rarely polygonal. The sexual morph is undetermined (Khodosovtsev et al. 2018). No DNA sequence data are available for the genus yet.

Type species: Katherinomyces cetrariae Khodos.

Other accepted species: This genus is monotypic.

Figure 1 – Katherinomyces cetrariae (KHER 5461, holotype). a Conidiomata on the thallus of Cetraria aculeata.b Section through conidioma. c Conidiogenous cells (arrows) with bacilliform conidia. d Ornamented bacilliform conidia. e Conidiogenous cells (arrows) with bacilliform conidia f Ellipsoid to rounded conidia a. Scale bars: a = 100 μm, b–f = 10 μm. Redrawn from Khodosovtsev et al. (2016). 



Khodosovtsev A, Darmostuk V, Suija A, Ordynets A. 2018 – Didymocyrtis trassii sp. nov. and other lichenicolous fungi on Cetraria aculeata. The Lichenologist 50, 529–540.

Khodosovtsev AY, Gavrylenko LM, Klymenko VM. 2016 – Katherinomyces cetrariae gen. et sp. nov. asexual Ascomycota and Sphaerellothecium aculeatae sp. nov. Mycosphaerellaceae, new lichenicolous fungi on Cetraria aculeata in Ukraine. Nova Hedwigia 103, 47–55.


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