Type species: Acantholichen pannarioides P. M. Jørg.

Number of species: 6.

Family: Corticiaceae.

Description: A crustose lichen genus of 6 species in the Corticiaceae, Basidiomycota.

1. Acantholichen albomarginatus Dal-Forno, Marcelli & Lücking
   
2. Acantholichen campestris Dal-Forno, Spielmann & Lücking
   
3. Acantholichen galapagoensis Dal-Forno, Bungartz & Lücking
   
4. Acantholichen pannarioides P.M. Jørg.
   
5. Acantholichen sorediatus Dal-Forno, Sipman & Lücking
   
6. Acantholichen variabilis Dal-Forno, Coca & Lücking