Basionym Name:Gyrophora decussata f. maxima Lynge, in Lynge & Scholander, Skr. Svalbard Ishavet (Oslo)(no. 41): 55 (1932)
Homotypic synonyms:Omphalodiscus decussatus f. maximum (Lynge) Llano, Monograph of the Lichen Family Umbilicariaceae in the Western Hemisphere: 84 (1950)