Basionym Name:Omphalaria pulvinata var. laxa Müll. Arg., Bull. Murith. Soc. Valais. Sci. Nat. 10: 55 (1881)
Homotypic synonyms:Thyrea pachyphylla var. laxa (Müll. Arg.) Henssen, in Henssen & Jørgensen, Lichenologist 22(2): 146 (1990)Thyrea pulvinata var. laxa (Müll. Arg.) Zahlbr., Cat. Lich. Univers. 2: 810 (1924)