Basionym Name:Physcia tribacia f. tenuissima Vain., Meddn Soc. Fauna Flora fenn. 6: 135 (1881)
Homotypic synonyms:Physcia dubia f. tenuissima (Vain.) Nádv., Stud. Bot. Čechoslov. 8: 92 (1947)Physcia tribacia var. tenuissima (Vain.) Sántha, Folia Cryptog., Szeged 1: 498 (1928)