Key
James P. Bennett and Clifford M. Wetmore
Species Count: 254
Acarosporaceae
Arthrorhaphidaceae
Baeomycetaceae
Caliciaceae
Candelariaceae
Cladoniaceae
Collemataceae
Didymellaceae
Graphidaceae
Gyalectaceae
Harpidiaceae
Hymeneliaceae
Icmadophilaceae
Koerberiaceae
Lecanoraceae
Lecideaceae
Lichinaceae
Massalongiaceae
Megasporaceae
Mycocaliciaceae
Ochrolechiaceae
Ophioparmaceae
Pannariaceae
Parmeliaceae
Peltigeraceae
Pertusariaceae
Physciaceae
Pilocarpaceae
Placynthiaceae
Protothelenellaceae
Psoraceae
Ramalinaceae
Rhizocarpaceae
Sagiolechiaceae
Sphaerophoraceae
Sporastatiaceae
Stereocaulaceae
Teloschistaceae
Tephromelataceae
Trapeliaceae
Umbilicariaceae
Verrucariaceae
Xylographaceae