Lareunionomyces

Fungalpedia – Note 3029, Lareunionomyces

Lareunionomyces. Crous & M.J. Wingf.

Citation when using this data: Wenping Wu et al. 2023 – Fungalpedia.

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1

Classification: Neolauriomycetaceae, Helotiales, Leotiomycetidae, Leotiomycetes, Pezizomycotina, Ascomycota, Fungi

Mycelium consisting of hyaline, smooth, branched hyphae. Anamorph: Conidiophores solitary, erect, subcylindrical, straight, slightly flexuous, unbranched, dark brown, smooth, septate, thick-walled, basal cell slightly swollen, lacking rhizoid, terminating in a pale brown penicillate conidiogenous apparatus. Penicillate conidiogenous apparatus pale brown, smooth; primary branches brown, smooth, subcylindrical to clavate, giving rise to up to one to several secondary branches, pale brown, the upper layers giving rise to several phialides. Conidiogenous cells phialidic, pale brown to medium brown, smooth, flexuous, ampulliform to lageniform, with prominent cylindrical collarette, venter cylindrical to lageniform. Conidia hyaline, smooth, subcylindrical, aseptate, apex bluntly rounded, base truncate, in short chains that form slimy spore masses (Based on Crous et al. 2016b). Teleomorph: Unknown.

Ecology/substrate/host: Saprobe on dead leaves of trees.

Geographical distribution: Australia, China, Columbia, France, Kenya, Malawi and Thailand.

Description and illustration: Crous et al. (2016b).

Notes: The genus Lareunionomyces was created for L. syzygii, which morphologically resembled Neolauriomyces, Sporendocladia and Phialocephala in conidiogenous apparatus and conidial morphology, but was phylogenetically distinct (Wingfield et al. 1987; Jacobs et al. 2003; Crous et al. 2016b, 2018a, b). In Lareunionomyces the conidiogenous apparatus are more intricate, with numerous tightly aggregated branches and phialides, while in other three genera mentioned above, the conidiogenous apparatus are relatively simple and with less secondary branches and less packed phialides (Crous et al. 2016b). Four species, L. eucalypti, L. eucalypticola, S. loeiensis and L. syzygii, are known in the genus and they can be distinguished by conidiogenous apparatus and conidial morphology (Crous et al. 2016b, 2018a, b, 2019). In the phylogenetic trees generated by the integrated LSU and ITS dataset, five accepted species of Lareunionomyces clustered together as one strongly supported monophyletic clade (Figs. 3, 127; Wenping Wu et al. 2023). In this study, three species including one new species were discovered from China.

Type species: Lareunionomyces syzygii Crous & M.J. Wingf.

Other accepted species: Species Fungorum – search Lareunionomyces.

Figure 1 – Lareunionomyces syzygii (Wu16875). a–d Conidiophores and apical fertile region with phialides. e Basal stroma. f, g, i, j Apical fertile region with branches and phialides. h, k–m Conidia. Scale bar: 20 µm for a, b; 10 µm for b–d; 5 µm for e–m