Basionym Name:Arthopyrenia adnexa var. leptosperma Zahlbr., in Skottsberg, Nat. Hist. Juan Fernandez Easter Isl., (Bot.) 3(11): 320 (1924)
Homotypic synonyms:Anisomeridium leptospermum (Zahlbr.) R.C. Harris, More Florida Lichens, Incl. 10 Cent Tour Pyrenol. (New York): 147 (1995)