Basionym Name:Microthelia willeyana Müll. Arg., Flora, Regensburg 68(17): 332 (1885)
Homotypic synonyms:Mycomicrothelia willeyana (Müll. Arg.) D. Hawksw., Bull. Br. Mus. nat. Hist., Bot. 14(2): 119 (1985)Pyrenula willeyana (Müll. Arg.) Willey, Enum. Lich. New Bedford: 39 (1892)