• Natural key to orders including foliicolous species
• Natural key to families including foliicolous species
• Artificial key to genera including foliicolous species

Family to genera keys:

• Arthoniaceae: Key to genera including foliicolous species
• Roccellaceae: Key to genera including foliicolous species
• Verrucariaceae: Key to genera including foliicolous species
• Monoblastiaceae: Key to genera including foliicolous species
• Strigulaceae: Key to genera including foliicolous species
• Porinaceae: Key to genera including foliicolous species
• Asterothyriaceae: Key to genera including foliicolous species
• Gomphillaceae: Key to genera including foliicolous species
• Thelotremataceae: Key to genera including foliicolous species
• Pilocarpaceae: Key to genera including foliicolous species

Genus to species keys:

• Aderkomyces: Key to foliicolous species
• Asterothyrium: Key to foliicolous species
• Psorotheciopsis: Key to foliicolous species
• Tapellaria: Key to foliicolous species
• Tricharia: Key to foliicolous species
• Trichothelium: Key to foliicolous species