Type species: Monocalenia monospora (Vězda) XavierLeite, M. Cáceres & Lücking [MycoBank MB 850490]. Basionym: Calenia monospora Vězda, Folia Geobot. Phytotax. 14: 56 (1979).
Genus description: Thallus foliicolous, continuous, lacking setae. Apothecia erumpent, zeorine; disc pruinose; proper margin indistinct, thalline margin distinct, not prominent. Excipulum prosoplectenchymatous, colorless. Hypothecium prosoplectenchymatous, colorless. Epithecium granular, with epithecial algae. Ascospores single, muriform. Hyphophores setiform, pale. Diahyphae inserted apically, moniliform, with fusiform segments.