Key
James P. Bennett and Clifford M. Wetmore
Species Count: 254
Acarosporaceae
Arthoniaceae
Caliciaceae
Candelariaceae
Catillariaceae
Cladoniaceae
Collemataceae
Fuscideaceae
Graphidaceae
Hymeneliaceae
Koerberiaceae
Lecanoraceae
Lecideaceae
Lichinaceae
Massalongiaceae
Megasporaceae
Monoblastiaceae
Mycocaliciaceae
Ochrolechiaceae
Opegraphaceae
Pannariaceae
Parmeliaceae
Peltulaceae
Pertusariaceae
Phlyctidaceae
Physciaceae
Porinaceae
Porocyphaceae
Psilolechiaceae
Psoraceae
Ramalinaceae
Rhizocarpaceae
Roccellaceae
Scoliciosporaceae
Stereocaulaceae
Stictidaceae
Teloschistaceae
Thelenellaceae
Thrombiaceae
Trapeliaceae
Trypetheliaceae
Umbilicariaceae
Verrucariaceae