Fungalpedia – Note 2237, Hexagonella
Hexagonella F. Stevens & Guba ex F. Stevens
Citation when using this data: Hongsanan S et al. 2020 – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank.
Classification: Schizothyriaceae, Mycosphaerellales, Dothideomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Hexagonella was introduced as a monotypic genus with H. peleae collected on leaves of Pelea rotundifolia from Hawaii. The genus was characterized by rounded, plane, cushion-like ascomata, with dense, woven mycelium, with the central disk surrounded by irregular periphery of sparsely interwoven, loosely, branched, spreading hyphae, hexagonal, mesh-like peridial structure, 8-spored asci, scattered in hexagonal cell-meshes, resting in a space between the sterile cells and brown, ellipsoidal to oblong, 2-septate ascospores (Stevens 1925, Phookamsak et al. 2016). The type specimens of Hexagonella are located in ILLS and BPI (only micro-slide of ascomata available in BPI). Phookamsak et al. (2016) examined the micro-slide from BPI and noted that the ascomata differed from the original description and iconotype described in Stevens (1925). Phookamsak et al. (2016) tentatively placed the genus in Schizothyriaceae based on the protologue described in Stevens (1925).
Type species: Hexagonella peleae F. Stevens & Guba, in Stevens, Bulletin of the Bernice P. Bishop Museum, Honolulu, Hawaii 19: 89 (1925).
Other accepted species: Species Fungorum – search Hexagonella.
References
Stevens FL. 1925 – Hawaiian fungi. Bernice P. Bishop Museum bulletin 19, 1–189.
Entry by
Sinang Hongsanan, Guangdong Provincial Key Laboratory for Plant Epigenetics, Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Science and Oceanography, Shenzhen University, Shenzhen 518060, People’s Republic of China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50002, Thailand
Published online 25 March 2026