Fungalpedia – Note 2685, Bachmanniomyces
Bachmanniomyces D. Hawksw.
Citation when using this data: Meng QF et al. – Fungalpedia.
Index Fungorum, Faceoffungi, MycoBank, GenBank, Fig 1.
Classification: Ostropomycetidae genera incetae sedis, Lecanoromycetes, Pezizomycotina, Ascomycota, Fungi
= Phaeopyxis Rambold & Triebel
Bachmanniomyces was established by Hawksworth (1981b) to accommodate the type species B. uncialicola, which grows on Cladonia uncialis f. biuncialis and was initially classified as Phyllosticta uncialicola Zopf. Hawksworth (1981) placed the genus in Sphaeropsidales within Coelomycetes. However, phylogenetic analyses by Pino-Bodas et al. (2017) and Diederich et al. (2018a) have since clustered Bachmanniomyces within the subclass Ostropomycetidae, though relationships within this subclass remain unresolved. Diederich et al. (2018a) proposed that Bachmanniomyces uncialicola represents the asexual stage of Phaeopyxis punctum, suggesting that Phaeopyxis be synonymized with Bachmanniomyces due to the latter’s earlier naming.
Bachmanniomyces is characterized by its asexual morph, featuring solitary, unilocular, globose to subglobose conidiomata that are immersed and hyaline, with orange or brown ostioles. The conidiogenous cells are holoblastic, acrogenous, elongate-ampulliform, proliferative, annellate, and hyaline. The conidia are broadly fusiform to pyriform, mostly asymmetric, hyaline, simple, smooth, and embedded in mucilage (Hawksworth 1981b).
To date, eight species are recognized within Bachmanniomyces, seven of which are lichenicolous. The only exception is B. carniolicus, a lichen found on bark that was transferred from Biatora carniolica Arnold.
Type species: Bachmanniomyces uncialicola (Zopf) D. Hawksw.
= Phyllosticta uncialicola Zopf
Other accepted species: Species Fungorum – search Bachmanniomyces.
Figure 1 – Bachmanniomyces uncialicola redrawn from Hawksworth (1981). a Gall on geniculately deformed branch. b Vertical section of pycnidium. c Vertical section of pycnidial wall. d Conidiogenous cells. e Conidia. Scale bars: a = 1 mm, b = 50 μm, c–d = 10 μm, e = 5 μm.
References
Hawksworth DL. 1981b – The lichenicolous Coelomycetes. Bulletin of the British Museum (Natural History), Botany 9 (1), 1–98.
Entry by
Meng QF, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand and School of Public Health, Zunyi Medical University, Guizhou 563000, China.
Published online 8 July 2026