Fungalpedia – Note 2843, Oxenbollia
Oxenbollia. W.P. Wu & Y.Z. Diao.
Citation when using this data: Wenping W et al. 2022 – Fungalpedia.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1
Classification: Chaetosphaeriaceae, Chaetosphaeriales, Sordariomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Etymology: Named after the former mycologist Karen Oxenboll from Novozymes A/S, who gave strong support to this work.
Diagnosis: Similar to Codinaeella and Tainosphaeria in morphology of conidiophores, conidiogenous cells and conidia, but differs phylogenetically.
Colonies effuse, hairy, dark brown. Mycelium partly immersed and partly superficial, composed of brown, branched and septate hyphae. Teleomorph: Unknown. Anamorph: Setae absent. Conidiophores macronematous, mononematous, simple, scattered or rarely aggregated, erect, straight, or slightly flexuous, cylindrical, dark brown and thick- and smooth-walled in lower part, becoming paler and thin-walled towards the apex, septate, terminating with a conidiogenous cell. Conidiogenous cells integrated, terminal, monophialidic, occasionally with 1–2 sympodial proliferation, cylindrical, pale brown to brown, thin-walled, ending in a flared collarette which is funnel-shaped. Conidia holoblastic, acrogenous, solitary, formed in droplet surrounding the tips of conidiogenous cells, lunate, fusiform, curved, aseptate, hyaline, smooth, guttulate, both apex and base bear a setula.
Ecology/Substrate/Host: Saprobe on dead plant material.
Geographical distribution: China.
Notes: Phylogenetic analysis indicates that Tainosphaeria is a polyphyletic genus and the monophyletic generic concept was proposed with 5 lineages that correspond to particular morphologies (Réblová et al. 2021). One strain obtained from China is grouped together with Tainosphaeria and related genera, but forms a distinct linkage and the new genus Oxenbollia is introduced for it. The absence of setae, unbranched conidiophores, terminal mono phialidic conidiogenous cells with funnel-shaped collarette, and lunate, aseptate conidia with simple setulae are the main diagnostic characters of this newly established genus. Morphologically it is very similar to member of Codinaeella and Tainosphaeria s. str.
Type species: Oxenbollia lunatospora W.P. Wu & Y.Z. Diao, Fungal Diversity 116: 190 (2022)
Other accepted species: Species Fungorum – search Oxenbollia.
Figure 1 – Oxenbollia lunatospora (Wu6065, holotype). a–i Conidiophores and conidiogenous cells with funnel-shaped collarettes. j–t Conidia. Scale bar: a 10 μm, b–t 5 μm.
References
Entry by
Wenping Wu, R&D Center, Novozymes China, No. 14 Xin Xi Lu, Shangdi Zone, Haidian District, Beijing 100085, People’s Republic of China
Published online 20 July 2026