The genus was
circumscribed by French botanist
Antoine Laurent Apollinaire Fée in Essai Crypt. Exot. (Paris) 1: XLVI, 100 in 1825. It was later resurrected by Bernhard Marbach in his 2000
monograph on
Buellia sensu lato. The genus contains species that are part of the tropical
Buellia group with 2-celled
ascospores, and which lack
algae in the margin. ==Species==