Basionym Name:Lecidea postuma subsp. subreducta Vain., Meddn Soc. Fauna Flora fenn. 10: 142 (1883)
Homotypic synonyms:Lecidea subreducta (Vain.) Zahlbr., Cat. Lich. Univers. 4: 393 (1926)Rhizocarpon subreductum (Vain.) Vain., Acta Soc. Fauna Flora fenn. 53(no. 1): 279 (1922)