Fungalpedia – Note 3098, Hyalohelisphora

 

Hyalohelisphora J. Ma, K.D. Hyde & Y.Z. Lu.

Citation when using this data: Jian Ma et al. 2024 – Fungalpedia.

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

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

Etymology: “Hyalohelisphora” refers to hyaline conidiophores and helicoid conidia of this fungus.

Saprobic on decaying wood in a terrestrial habitat. Sexual morph Undetermined. Asexual morph Hyphomycetous, helicosporous. Colonies on natural substrate superficial, effuse, gregarious, with masses of crowded, glistening conidia, white. Mycelium partly immersed, partly superficial, composed of hyaline to pale brown, branched, septate, smooth hyphae. Conidiophores macronematous, mononematous, erect, irregular cylindrical, short, flexuous, branched, septate, hyaline, smooth-walled, thick-walled. Conidiogenous cells holoblastic, monoblastic, integrated, terminal or intercalary, subcylindrical or irregular, denticulate, hyaline, smooth-walled. Conidia solitary, acropleurogenous, helicoid, tapering towards the ends, developing on tooth-like protrusion, not becoming loose in water, multi-septate, guttulate, hyaline, smooth-walled.

Notes: Hyalohelisphora is morphologically similar but phylogenetically distinct from the asexual morph of Helicosporium (Fig. 4; Ma J et al. 2024) (Lu et al. 2017a, 2018b; Ma et al. 2023c). Hyalohelisphora can be delineated from other helicosporous genera by its hyaline, small conidial morphology, and distinctly hyaline, short conidiophores (Lu et al. 2017a, 2018b; Ma et al. 2023c). Therefore, we introduce Hyalohelisphora as a novel monotypic genus to accommodate H. lignicola as the type species.

Type species: Hyalohelisphora lignicola J. Ma, K.D. Hyde & Y.Z. Lu, sp. nov.

Other accepted species: Species Fungorum – search Hyalohelisphora.

 

Figure 1 – Hyalohyphora lignicola (HKAS 128863, holotype). a, b Colonies on decaying wood. c–e Conidiophores and conidiogenous cells. f, g Conidiogenous cells. h–l Conidia. m Germinating conidium. n, o Colonies on PDA from above and below. Scale bars: e, m = 20 µm, c, d, h–l = 10 µm, f, g = 5 µm

 

References

Lu YZ, Boonmee S, Bhat DJ, Hyde KD, Kang JC. 2017a – Helicosporium luteosporum sp. nov. and Acanthohelicospora aurea (Tubeufiaceae, Tubeufiales) from terrestrial habitats. Phytotaxa 319(3):241–253.

Lu YZ, Liu JK, Hyde KD, Jeewon R et al. 2018b – A taxonomic reassessment of Tubeufiales based on multi-locus phylogeny and morphology. Fungal Diversity 92:131–344.

Ma J, Hyde KD, Tibpromma S, Gomdola D et al. 2024 – Taxonomy and systematics of lignicolous helicosporous hyphomycetes. Fungal Diversity, 129(1), 365–653.

Ma J, Zhang LJ, Boonmee S, Xiao XJ et al. 2023c – Morphological and phylogenetic analyses reveal three new species and one new record of Tubeufia (Tubeufiales, Tubeufiaceae) from southern China. MycoKeys 99:87–108.

 

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 3 September 2026

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