Ptechetelium

Fungalpedia – Note 580, Ptechetelium

 

Ptechetelium Oberw. & Bandoni

Citation when using this data: Zhang et al. 2025 (in prep.) – Fungalpedia, Basidiomycota.

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

Classification: Eocronartiaceae, Platygloeales, Incertae sedis, Pucciniomycetes, Pucciniomycotina, Basidiomycota, Fungi

The monotypic genus Ptechetelium was proposed to accommodate the new combination of P. cyatheae (Bas. Herpobasidium cyatheae) by Oberwinkler and Bandoni (1984). Currently, the genus is placed in Eocronartiaceae within Platygloeales (Pucciniomycetes, Basidiomycota) based on morphological characteristics alone (Wijayawardene et al. 2022; Hyde et al. 2024c). Ptechetelium is characterized by hyphae emerging through a stoma with dendrohyphidia, generative hyphae, probasidia and basidia; stalked, globose to elongate-pyriform probasidia; cylindrical basidia with 4-celled when mature; and hyaline, irregularly sickle-shaped basidiospores with oblique apiculi (Oberwinkler and Bandoni 1984). Ptechetelium cyatheae can be distinguished from the similar species Platycarpa polypodii (the type species of Platycarpa) based on differences of the parasite develops, basidial development, basidiospores shapes, and the intercellular hyphae in mesophyll cells and basidiocarps (Oberwinkler and Bandoni 1984). The only known species in Ptechetelium has been reposted as a parasite on fern sporophylls of Cyathea stuebelii and an unidentified fern, but not on sporangia, in Bolivia and Ecuador (Couch 1949; Oberwinkler and Bandoni 1984).

Type species: Ptechetelium cyatheae (Syd.) Oberw. & Bandoni.

≡ Herpobasidium cyatheae Syd.

= Platycarpa boliviensis Couch.

Other accepted species: Species Fungorum – search Ptechetelium.

 

 

 

Figure 1 – Ptechetelium cyatheae. a Dendrohyphidium, probasidium, young basidium and basidium with sterigmata. b Basidiospores, one germinating by repetition. Redrawn from Oberwinkler and Bandoni (1984).

 

References

Couch JN 1949 – The taxonomy of Septobasidium polypodii and S. album. Mycologia 41:427–441.

Hyde KD, et al. 2024c – The 2024 outline of fungi and fungus-like taxa. Mycosphere (in press).

Oberwinkler F, Bandoni RJ 1984 – Herpobasidium and allied genera. Transactions of the British Mycological Society 83:639–658.

Wijayawardene NN, Hyde KD, Dai DQ, Sánchez-García M, Goto BT, Saxena R, Erdoğdu M, Selçuk F, Rajeshkumar KC, Aptroot A, Błaszkowski J, Boonyuen N, da Silva GA, de Souza FA, Dong W, Ertz D, Haelewaters D, Jones EBG, Karunarathna SC, Kirk PM, Kukwa M, Kumla J, Leontyev DV, Lumbsch HT, Maharachchikumbura SSN, Marguno F, Martínez-Rodríguez P, Mešić A, Monteiro JS, Oehl F, Pawłowska J, Pem D, Pfliegler WP, Phillips AJL, Pošta A, He MQ, Li JX, Raza M, Sruthi OP, Suetrong S, Suwannarach N, Tedersoo L, Thiyagaraja V, Tibpromma S, Tkalčec Z, Tokarev YS, Wanasinghe DN, Wijesundara DSA, Wimalaseana SDMK, Madrid H, Zhang GQ, Gao Y, Sánchez-Castro I, Tang LZ, Stadler M, Yurkov A, Thines M 2022 – Outline of Fungi and fungus-like taxa – 2021. Mycosphere 13:53–453.

 

Entry by 

Jing-Yi Zhang, School of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang, 550025, People’s Republic of 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, Guizhou Key Laboratory of Agricultural Microbiology, Guizhou Academy of Agricultural Sciences, Guiyang, 550009, People’s Republic of China.

 

Published online 11 June 2025

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