Basionym Name:Umbilicaria subaprina Frey, Ber. schweiz. bot. Ges. 45: 220, 223, tab. XI, fig. 3 (1936)
Homotypic synonyms:Omphalodiscus subaprinus (Frey) Llano, Monograph of the Lichen Family Umbilicariaceae in the Western Hemisphere: 102 (1950)Omphalodiscus subaprinus var. subaprinus (Frey) Llano, Monograph of the Lichen Family Umbilicariaceae in the Western Hemisphere: 102 (1950)