Fungalpedia – Note 572, Phacidina

 

Phacidina Höhn

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

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

Classification: Leptopeltidaceae, Incertae sedis, Incertae sedis, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi

Phacidina was established by Höhnel (1917) as a monotypic genus. The single species, P. gracilis (Bas. Phacidium gracile), is characterized by scattered ascocarps with pseudoparenchymatous shield; unitunicate, J+, clavate asci with aseptate, rod-like, hyaline spores (Voss 1882; Holm and Holm 1981a; Höhnel 1917). Phacidina has an uncertain taxonomic placement among Dothideomycetes genera incertae sedis in Ascomycota (Wijayawardene et al. 2022; Hyde et al. 2024c), but presents an interesting and unique ecology that presume ably co-extensive with Lycopodium species (Voss 1882; Holm and Holm 1981a; Höhnel 1917). Phacidina gracilis is an encountered fungus that has only been collected from ferns belonging to Lycopodium (Lycopodiaceae), including L. alpinum, L. clavatum, L. complanatum, L. obscurum and L. tristachyum (Lind 1934; Cooke 1977; Holm and Holm 1981a).

Type species: Phacidina gracilis (Niessl) Höhn.

≡ Phacidium gracile Niessl.

Other accepted species: Species Fungorum – search Phacidina.

 

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Figure 1 – Phacidina gracilis. a Apothecia on the host substratum. b Asci and ascospores. Redrawn from Holm and Holm (1981a).

 

References

Cooke WB 1977 – The 1973 Massachusetts foray. Mycologia 69:1226–1231.

Höhnel FXR von 1917 – Mykologische Fragmente. Annales Mycologici 15: 293–383.

Holm L, Holm K 1981a –  Ascomycetes on Nordic lycopods. Karstenia 21:57–72.

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

Lind J 1934 – Studies on the geographical distribution of arctic circumpolar micromycetes. Kongelige Danske Videnskabernes Selskabs Naturvidenskabelige og Mathematiske Afhandlinger 11:1–152. 

Voss W 1882 – Zwei neue Ascomyceten. Österreichische botanische Zeitschrift 32:357–359.

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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