Fungalpedia – Note 2035, Johansoniaceae
Johansoniaceae. Doilom, Phookamsak & K.D. Hyde.
Citation when using this data: Hongsanan S et al. 2020 – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank
Classification: Capnodiales, Dothideomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Epiphytic, saprobic, and associated with brown spots on leaves. Sexual morph: Mycelium superficial, septate, brown. Ascomata superficial, scattered, solitary, flattened, brown to black, pulvinate, uni-loculate, membranous, lacking ostioles, with or without hyphae at the base, sometimes with dots in hyphae at the central apex, with or without setae. Setae septate, pale brown to brown, surrounding ascomata, erect, straight to curved. Peridium with meandering arrangement, thin-walled at the base, with cells of textura angularis to textura globulosa. Hamathecium comprising hypha-like, branched, septate, anastomosing, cellular pseudoparaphyses, intermingled among asci. Asci 8-spored, bitunicate, ellipsoid to subcylindrical or clavate, sessile to subsessile or with short furcate pedicel, with ocular chamber, thick-walled. Ascospores 2–3-seriate, ovoid to ellipsoidal, apical cell wider than basal, hyaline, 1-septate cell, with mucilaginous sheath (adapted from Doilom et al. 2018). Asexual morph: Undetermined.
Notes – Crous et al. (2010) indicated that Johansonia based on sequence data of J. chapadiensis was a member of Capnodiales. Doilom et al. (2018) introduced Johansoniaceae to accommodate Johansonia and Orthobellus based on morphology and phylogeny by Crous et al. (2010). Our phylogenetic analyses support these results, with Johansonia forming a distint lineage within Capnodiales. Doilom et al. (2018) inferred that genera in Johansoniaceae are similar to some members in Schizothyriaceae. However, Johansoniaceae has uni-loculate ascomata, a well-developed peridium at the base, with narrowly anastomosing pseudoparaphyses, and mostly ellipsoid to subcylindrical or clavate asci, while members of Schizothyriaceae mostly have multi-loculate ascostromata, poorly-developed peridium at the base, each ascus forming in a network-like structure, with subglobose to ovoid asci (Doilom et al. 2018).
Type genus: Johansonia Sacc.
Other accepted species: Species Fungorum – search Johansoniaceae.
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 23 March 2026