Class Arthoniomycetes
Order Arthoniales
Family Roccellaceae - Family includes Scribble and Dot Lichens and Lichenicolous Fungus
Class Eurotiomycetes
Subclass Chaetothyriomycetidae
Order Pyrenulales
Family Pyrenulaceae
Subclass Mycocaliciomycetidae
Order Mycocaliciales
Family Mycocaliciaceae - Family includes Holy Pins
Order Verrucariales
Family Verrucariaceae - Family includes Tar and Wart Lichens
Class Lecanoromycetes
Subclass Acarosporomycetidae
Order Acarosporales
Family Acarosporaceae - Family includes Cracked Lichens
Subclass Lecanoromycetidae
Order Lecanorales
Family Bacidiaceae - Family includes Black Shields and Earth Wrinkles Lichen
Family Cladoniaceae - Family includes Pixie-cup, Nipple, Powderhorn and Reindeer Lichens.
Family Lecanoraceae - Family includes Rim Lichens
Family Parmeliaceae - Family includes Smokey Crottle, Treeflutes, Oakmoss, Punctelia, Shield, Toad, Tube, Loop, Beard and Ruffle Lichens
Family Ramalinaceae - Family includes Sea Ivory and Cartilage Lichens
Family Rhizocarpaceae - Family includes Map Lichens
Family Sphaerophoraceae
Family Stereocaulaceae
Order Lecideales
Family Lecideaceae - Family includes Rust Disk, Lecidella and Lecidea Lichens
Family Porpidiaceae
Order Peltigerales
Family Collemataceae - Family includes Jelly, Jelly Skin and Skin Lichens
Family Pannariaceae - Family includes Degelia
Family Peltigeraceae - Family includes Dog Lichens
Order Teloschistales
Family Caliciaceae
Family Physciaceae - Family includes Pleated White, Disc and Strap Lichens, including the rare Ciliate Strap Lichen.
Family Teloschistaceae - Family includes Firedot, Golden Hair, Golden-eye, Scrambled Egg and Orange Lichens
Subclass Ostropomycetidae
Order Ostropales
Family Graphidaceae
Family Porinaceae
Order Pertusariales
Family Pertusariaceae - Family includes Powdery Saucer, Crab-eye and Pore Lichens
incertae sedis
Order Candelariales
Family Candelariaceae - Family includes Egg-yolk Lichens
Family Chaetosphaerellaceae
Chaetosphaerella
Chaetosphaerella phaeostroma - A Lichenized Fungus
Class Leotiomycetes
Order Gyalectales
Family Coenogoniaceae - includes Dimerella
Family Gyalectaceae - includes Belonia
Class Lichinomycetes
Order Lichinales
Family Lichinaceae - Family includes Black Lichens
Class Incertae sedis
Order Incertae sedis
Family Xanthopyreniaceae - Family includes Lichens of Barnacles and Shells.
The following websites are highly recommended:
Alan Silverside's Lichen Pages
British Lichens
Irish Lichens
Lichens.ie - Lichens of Ireland Project and