Basionym Name:Acarospora hospitans f. insolita Asta & Cl. Roux, Bull. Mus. Hist. Nat. Marseille 37: 78 (1977)
Homotypic synonyms:Acarospora impressula f. insolita (Asta & Cl. Roux) Clauzade & Cl. Roux, Bull. Mus. Hist. Nat. Marseille 41: 82 (1981)