Fungalpedia – Note 751, Helicoma

 

Helicoma Corda

Citation when using this data: Karimi O et al. 2025 (in prep.) – Fungalpedia, Ascomycota.

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

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

Corda (1837) established the genus Helicoma (H.), based on the type species H. muelleri. Currently, there are 65 accepted Helicoma species listed in Species Fungorum (2024). Helicoma has a worldwide distribution and is reported from both freshwater and terrestrial habitats (Boonmee et al. 2014, Lu et al. 2018, Lu & Kang 2020, Li et al. 2022, Ma et al. 2023). To date, one species of this genus (H. gigasporum) and one unidentified Helicoma taxon (Helicoma sp.) have been reported from peat swamp forests (Pinnoi et al. 2006, Pinuruan et al. 2007). In this study, we describe H. narathiwatense and H. eleiodoxae as novel species found on submerged rachides of Eleiodoxa conferta from the peat swamp forest in Narathiwat, Thailand.

Type species: Helicoma muelleri Corda, Icon. fung. (Prague) 1: 15 (1837).

Other accepted species: Species Fungorum – search Helicoma.

 

image

 

Figure 1 – Helicoma narathiwatense (MFLU 24-0498, holotype). a Host. b Colonies on the natural substrate. c–e Conidiophores and conidiogenous cells. f–h Conidia. i A germinated conidium. Scale bars: b = 200 μm, c = 50 μm, d = 30 μm, e = 15 μm, f = 100 μm, g = 50 μm, h, i = 65 μm.

 

References

Boonmee S, Rossman AY, Liu JK, Li WJ et al. 2014 – Tubeufiales, ord. nov., integrating sexual and asexual generic names. Fungal Diversity 68, 239–298.

Corda ACJ. 1837 – Icones fungorum hucusque cognitorum 1, 1–32.

Li LL, Shen HW, Bao DF, Wanasinghe DN et al. 2022 – The plethora of Tubeufiaceae in lakes of the northwestern Yunnan plateau, China. Frontiers in Microbiology 13, 1056669.

Lu Y, Kang J. 2020 – Research progress on helicosporous hyphomycetes. Journal of Fungal Research 18, 304–314.

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

Ma J, Xiao XJ, Liu NG, Boonmee S et al. 2023 – Morphological and multi-gene phylogenetic analyses reveal Pseudotubeufia gen. nov. and two new species in Tubeufiaceae from China. Journal of Fungi 9, 742.

Pinnoi A, Lumyong S, Hyde KD, Jones EBG et al. 2006 – Biodiversity of fungi on the palm Eleiodoxa conferta in Sirindhorn peat swamp forest, Narathiwat, Thailand. Fungal Diversity 22, 205–218.

Pinruan U, Hyde KD, Lumyong S, McKenzie EHC, Jones EBG 2007 − Occurrence of fungi on tissues of the peat swamp palm Licuala longicalycata. Fungal Diversity 25: 157−173.

 

Entry by

Omid Karimi, State Key Laboratory of Discovery and Utilization of Functional Components in Traditional Chinese Medicine & School of Pharmaceutical Sciences, Guizhou Medical University, Guian New District, Guizhou 550004, 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 28 July 2025

Back to Glossary Index Page