Calonarius Niskanen & Liimat.

Index Fungorum number: IF 552199; Mycobank number: MB 552199

Notes – This species-rich genus with an estimated around 200 species is only known from the Northern Hemisphere. The species are predominantly calcicolous or calciphilous, many are rare with narrow ecological preferences and thus are included in national red lists in several countries. Typical for the members of this genus are medium- to large-sized, pileocarpic, often brightly coloured basidiomes with a more or less, usually distinctly marginated bulb at the base of the stipe. The pileus is viscid to glutinous, and the stipe is dry. The basidiospores are amygdaloid to citriform and coarsely verrucose, and the pileipellis is simplex. Part of the species have a positive KOH-reaction. The genus includes three subgenera: Calonarius, Calochroi and Fulvi (Liimatainen et al. 2022).