Thelenidia
Thelenidia Nyl., Flora, Regensburg 69: 463 (1886).
Index Fungorum number: IF 5421; Facesoffungi number: FoF 12502, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.
Lichen on pyrenocarp. Superficial mycelium absent. Sexual morph: Ascomata semi-immersed, solitary, globose to sub globose, dark brown to black, ostiole not observed. Peridium 2 layers, inner layer with hyaline textura angularis cells, outer layer with dark brown to black textura angularis cells. Hamathecium comprising paraphyses, embedded in a gelatinous matrix. Asci 1- spored, unitunicate, clavate, ocular chamber absents, long pedicel when young. Ascospores aseptate, obovoid, upper part broader than lower part, slightly constricted at the middle, verrucose, hyaline when immature, brown at maturity. Asexual morph: Unknown.
Type species: Thelenidia monosporella Nyl.
Notes: Thelenidia is characterised by 1-spored asci and aseptate ascospores and has a lichenicolous lifestyle. Lücking et al. (2016) and Doilom et al. (2018) placed Thelenidia in Pezizomycotina incertae sedis. Fresh collections with DNA sequence data are needed to confirm the systematic position of Thelenidia.
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