Fungalpedia – Note 581, Radiciseta
Radiciseta Sawada & Katsuki
Citation when using this data: Zhang et al. 2025 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1
Classification: Incertae sedis, Incertae sedis, Incertae sedis, Incertae sedis, Pezizomycotina, Ascomycota, Fungi
Radiciseta was introduced as a monotypic genus to accommodate the type species R. blechni, a fern-inhabiting fungus described without photoplates (Sawada 1959). Radiciseta is a poorly studied genus, known only from its type material of R. blechni, which was reported as fern pathogen causing leaf spot of Blechnum orientale in Taiwan Province, China (Sawada 1959). The genus is characterized by yellowish brown to gray leaf spots; fasciculate, 2–3-septate, dark brown conidiophores; acrogenous, lunate, curved, 1–4- septate, and hyaline phragmoconidia, lacking details of conidiogenesis (Sawada 1959; Seifert et al. 2011). Currently, Radiciseta is placed in Ascomycota genera incertae sedis without available molecular data (Hyde et al. 2011). This species is suspected to be a member of the Cercospora complex based on morphology (Seifert et al. 2011) The type species of Radiciseta blechni therefore needs to be recollected and restudied, with an epi-type and subject to phylogenetic analysis, and updated morphology with color photoplates.
Type species: Radiciseta blechni Sawada & Katsuki.
Other accepted species: Species Fungorum – search Radiciseta.
References
Sawada K 1959 – Descriptive catalogue of Taiwan (Formosan) fungi. XI. Special Publication, College of Agriculture, National Taiwan University 8:1–268.
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