Basionym Name:Collema decipiens var. diffusum Nyl., Mém. Soc. Imp. Sci. Nat. Cherbourg 5: 338 (1858)
Homotypic synonyms:Anema decipiens var. diffusum (Nyl.) Forssell, Nova Acta R. Soc. Scient. upsal., Ser. 3 13(no. 6): 92 (1885)Anema diffusum (Nyl.) Nyl., Lich. Envir. Paris: 19 (1896)Omphalaria decipiens var. diffusa (Nyl.) Harm., Lich. France 1: 62 (1905)Thyrea decipiens var. diffusa (Nyl.) Arnold, [as 'effusa'] Flora, Regensburg 68: 217 (1885)