Name requested: Calicium sphaerocephalumLichenologist 3 (1): 106. 3 (3): 310. 12 (1): 21.
Homotypic synonym: Mucor sphaerocephalusMycologia 20 (3): 176. Mycotaxon 79: 430.
Heterotypic synonym: Calicium salicinumLichenologist 3 (1): 106, 106. 3 (3): 310, 310. 12 (1): 21, 21, 21, 21. Lichens of North America null: 193, 194. Mycotaxon 35 (2): 419. 50: 55. 58: 200. 70: 441. 71: 174, 181, 189, 194. 87: 5, 6, 8, 12.