Fungalpedia – Note 3149, Brachyhelicoon
Brachyhelicoon G. Arnaud, Bulletin de la Société Mycologique de France 68: 208 (1952).
Citation when using this data: Jian Ma et al. 2024 – Fungalpedia.
Index Fungorum, Faceoffungi, MycoBank, GenBank.
Classification: Incertae sedis, Incertae sedis, Incertae sedis, Incertae sedis, Pezizomycotina, Ascomycota, Fungi.
Notes: Arnaud (1952) introduced a new genus Brachyhelicoon to accommodate B. xylogenum as the type species, which was found on branch litter of rubber (Hevea brasiliensis) in Thailand based on its morphological characteristics. Brachyhelicoon xylogenum is characterized by erect, hyaline, simple, aseptate, shorter, globose or oblong conidiophores, and hyaline, aseptate, spiral conidia (Arnaud 1952; Goos 1987). It should be noted that Arnaud did not provide a Latin diagnosis for B. xylogenum according to their description, and many subsequent authors did not offer further descriptions or comments on this species (Moore 1955; Goos 1987).
Type species: Brachyhelicoon xylogenum G. Arnaud, Bulletin de la Société Mycologique de France 68: 209 (1952).
Other accepted species: Species Fungorum – search Brachyhelicoon.
Figure 1 – (a) Cirrenalia macrocephala (redrawn from Seifert et al. (2011)); (b) Helicoascotaiwania farinosa (redrawn from Dayarathne et al. (2019)), a, b Helicoid conidia. Scale bars: a, b = 20 µm; (c) Torpedospora mangrovei (redrawn from Abdel-Wahab et al. (2010)). a–e conidia from culture, f conidia from natural wood. Scale bars: a–f = 5 µm; (d) Brachyhelicoon xylogenum (redrawn from Arnaud (1952)).
References
Arnaud G. 1952 – Mycologie concrète: genera. Bulletin trimestriel de la Société mycologique de France 68:181–223.
Goos RD. 1987 – Fungi with a twist: the helicosporous hyphomycetes. Mycologia 79(1):1–22.
Moore RT. 1955 – Index to the Helicosporae. Mycologia 47(1):90–103.
Entry by
Jian Ma, School of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang 550003, P.R. China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand.
Published online 10 September 2026