Homotypic Synonyms See Note

Basionym Name:
Umbilicaria spongiosa C.W. Dodge & G.E. Baker, Ann. Mo. bot. Gdn 25(2): 566 (1938)

Homotypic synonyms:
Gyrophora spongiosa (C.W. Dodge & G.E. Baker) N.S. Golubk. & Savicz, Nov. sist. Niz. Rast. 3: 259 (1966)
Gyrophora spongiosa var. spongiosa (C.W. Dodge & G.E. Baker) N.S. Golubk. & Savicz, Nov. sist. Niz. Rast. 3: 259 (1966)
Omphalodiscus spongiosus (C.W. Dodge & G.E. Baker) Llano, Monograph of the Lichen Family Umbilicariaceae in the Western Hemisphere: 91 (1950)
Omphalodiscus spongiosus var. spongiosus (C.W. Dodge & G.E. Baker) Llano, Monograph of the Lichen Family Umbilicariaceae in the Western Hemisphere: 91 (1950)