Fungalpedia – Note 2256, Posidoniomyces
Posidoniomyces Vohník & Réblová
Citation when using this data: Hongsanan S et al. 2020 – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank.
Classification: Aigialaceae, Pleosporales, Pleosporomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Posidoniomyces was introduced by Vohník et al. (2019) with Posidoniomyces atricolor as the type species. Posidoniomyces atricolor was isolated as root mycobionts of the dominant and endemic Mediterranean seagrass Posidonia oceanica from marine habitat. The morphological characters in vivo are brown, septate hyphae, forming intracellular microsclerotia in the hypodermis of the terminal fine roots and finger-like pseudoparenchymatous net on the surface of roots, while two distinct colonial morphotypes (compact and mycelial) are formed in cultures (see Vohník et al. 2019). The sexual morph is undetermined.
Type species: Posidoniomyces atricolor Vohník & Réblová, in Vohník et al., MycoKeys 55: 72 (2019).
Other accepted species: Species Fungorum – search Posidoniomyces.
References
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 3 April 2026