Homotypic Synonyms See Note

Basionym Name:
Lichen diffractus Ach., Lich. suec. prodr. (Linköping): 63 (1799)

Homotypic synonyms:
Lecanora diffracta (Ach.) Ach., Lich. Univ.: 432 (1810)
Lecanora muralis f. diffracta (Ach.) Tuck., Syn. N. Amer. Lich. (Boston) 1: 184 (1882)
Lecanora muralis subsp. diffracta (Ach.) Fink, Contr. U.S. natnl. Herb. 14(1): 176 (1910)
Lecanora muralis var. diffracta (Ach.) Rabenh., Deutschl. Krypt.-Fl. (Leipzig) 2(1): 42 (1845)
Lecanora saxicola var. diffracta (Ach.) Rabenh., Lich. Ital. Merid.: 118 (1889)
Lichen peltatus * diffracta (Ach.) Lam., Encycl. Méth. Bot., Suppl. (Paris) 3(2): 399 (1813)
Parmelia muralis var. diffracta (Ach.) Schaer., Lich. helv. spicil. 9: 418 (1840)
Parmelia saxicola f. diffracta (Ach.) Fr., Lich. eur. reform. (Lund): 111 (1831)
Parmelia saxicola var. diffracta (Ach.) Fr., Lich. eur. reform. (Lund): 111 (1831)
Parmularia muralis var. diffracta (Ach.) Räsänen, Ann. bot. Soc. Zool.-Bot. fenn. Vanamo 12(no. 1): 63 (1939)
Placodium diffractum (Ach.) A. Massal., Sched. Crit. Lich. Exsicc. (Veronae) 10: 187 (1856)
Placodium murale f. diffractum (Ach.) Arnold, Verh. Kaiserl.-Königl. zool.-bot. Ges. Wien 37: 83 (1887)
Placodium murale var. diffractum (Ach.) Arnold, Flora, Regensburg 67: 312 (1884)
Placodium saxicola f. diffractum (Ach.) Stein, in Cohn, Krypt.-Fl. Schlesien (Breslau) 2(2): 107 (1879)
Placodium saxicola var. diffractum (Ach.) Flot., Übers. Arbeiten Veränd. Schles. Ges. Vaterl. Kultur [27]: 119 (1849)
Placolecanora muralis f. diffracta (Ach.) Kopach., Nov. sist. Niz. Rast. 9: 294 (1972)
Placolecanora muralis f. diffracta (Ach.) Kopach., in Kopaczevskaja et al., Opredelitel' Lishaĭnikov SSSR Vypusk (Handbook ol the lichens of the U.S.S.R.) (Leningrad) 1: 228 (1971)
Protoparmeliopsis muralis var. diffracta (Ach.) M. Choisy ex Werner, Cavanillesia 5: 169 (1932)
Psoroma saxicola var. diffractum (Ach.) Rabenh., Krypt.-Fl. Sachsen, Abth. 2 (Breslau): 245 (1870)
Squamaria diffracta (Ach.) Duby, Bot. Gall., Edn 2 (Paris) 2: 660 (1830)
Squamaria diffracta f. diffracta (Ach.) Duby, Bot. Gall., Edn 2 (Paris) 2: 660 (1830)
Squamaria diffracta var. diffracta (Ach.) Duby, Bot. Gall., Edn 2 (Paris) 2: 660 (1830)
Squamaria muralis var. diffracta (Ach.) Mereschk., Lich. Flor. Ross. Occid. Exsicc.: no. 13 (1913)
Squamaria saxicola var. diffracta (Ach.) Nyl., Mém. Soc. Imp. Sci. Nat. Cherbourg 3: 177 (1855)
Squamarina diffracta (Ach.) H. Kleinig, Nova Hedwigia 11: 521 (1966)