Fungalpedia – Note 2367, Helicoarctatus
Helicoarctatus. Y.Z. Lu, J.C. Kang & K.D. Hyde.
Citation when using this data: Yuan HS et al. 2020 – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1
Classification: Tubeufiaceae, Tubeufiales, Incertae sedis, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Notes: Helicoarctatus was introduced by Lu et al. (2018d) as a monotypic genus with
H. aquaticus as the type species. Helicoarctatus is characterized by setiform, unbranched, septate conidiophores, holoblastic, mono- to poly-blastic, denticulate conidiogenous cells and pleurogenous, helicoid, rounded at tip, multi-septate, tightly coiled 3–4 times, guttulate, hyaline conidia. The sexual morph is unknown (Lu et al. 2018d). We introduce a new species, Helicoarctatus thailandicus, based on both morphology and phylogeny.
Type species: Helicoarctatus aquaticus Y.Z. Lu, J.C. Kang & K.D. Hyde, in Lu, Liu, Hyde, Jeewon, Kang, Fan, Boonmee, Bhat, Luo, Lin & Eungwanichayapant, Fungal Diversity 92: 166 (2018).
Other accepted species: Species Fungorum – search Helicoarctatus.
Figure 1 – Helicoarctatus thailandicus (MFLU 19-0555, holotype). a–c Colony on decaying wood. d–f Conidiophores with attached conidia. g–h Conidiogenous cells with conidia. i–j Conidia. k Germinating conidium. l, m Colony on MEA from above and below. Scale bars: d–f = 50 μm, g–k = 30 μm
References
Entry by
Hai-Sheng Yuan, CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110164, People’s Republic of China, University of the Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
Published online 30 April 2026