Fungalpedia – Note 2487, Helicotruncatum

 

Helicotruncatum Y.Z. Lu, J.C. Kang & K.D. Hyde

Citation when using this data: Dong W et al. 2020 – Fungalpedia, Ascomycota.

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1

Classification: Tubeufiaceae, Tubeufiales, Incertae sedis, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi

Helicotruncatum was introduced by Lu et al. (2018b) based on ITS and LSU sequence data of Helicoma palmigenum (Penz. & Sacc.) Linder NBRC 32663 (Tsui et al. 2006b) and previous literatures (Linder 1929; Matsushima 1971; Goos 1986). The thickened lateral wall of the conidiophores and conidia of Helicotruncatum are distinct and represents a generic feature in Tubeufiaceae (Lu et al. 2018b). Although the molecular characters of NBRC 32663 warrant a distinct genus, the morphology was not provided (Tsui et al. 2006b). Helicotruncatum palmigenum commonly occurrs in terrestrial habitats, and herein we report it from freshwater habitats.

Type species: Helicotruncatum palmigenum (Penz. & Sacc.) Y.Z. Lu & K.D. Hyde

Other accepted species: Species Fungorum – search Helicotruncatum.

 

image

 

Figure 1 – Helicotruncatum palmigenum (MFLU 15-2715, new habitat and geographical record). a, b Colonies on submerged wood. c, d Conidiophores with attached conidia. e–g Conidiogenous cells. h–k Conidia. l Germinated conidium. m, n Colony on PDA (up-front, down-reverse). Scale bars: a, b = 100 μm, c = 40 μm, d, l = 20 μm, e–k = 10 μm.

 

References

Goos RD 1986 – A review of the anamorph genus Helicoma. Mycologia 78:744–761.

Linder DH 1929 – A monograph of the helicosporous Fungi Imperfecti. Ann Missouri Bot 16:227–388.

Lu YZ, Liu JK, Hyde KD, Jeewon R, Kang JC, Fan C, Boonmee S, Bhat DJ, Luo ZL, Lin CG, Eungwanichayapant PD 2018b – A taxonomic reassessment of Tubeufiales based on multi-locus phylogeny and morphology. Fungal Divers 92:131–344.

Matsushima T 1971 – Microfungi of the Solomon Islands and Papua-New Guinea. Mycologia 64:1–524

Tsui CKM, Sivichai S, Berbee ML 2006b – Molecular systematics of Helicoma, Helicomyces and Helicosporium and their teleomorphs inferred from rDNA sequences. Mycologia 98:94–104.

 

Entry by

Wei Dong, Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming 650500, China, Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand, Innovative Agriculture Research Center, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Institute of Plant Health, Zhongkai University of Agriculture and Engineering, Haizhu District, Guangzhou 510225, China

 

Published online 22 May 2026

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