Basionym Name:Lecidea bifera Nyl., Annls Sci. Nat., Bot., sér. 4 15: 47 (1861)
Homotypic synonyms:Heterothecium biferum (Nyl.) Müll. Arg., Flora, Regensburg 64(7): 104 (1881)Letrouitia bifera (Nyl.) Hafellner, Nova Hedwigia 35(4): 666 (1983)Lopadium biferum (Nyl.) Zahlbr., Cat. Lich. Univers. 4: 300 (1926)Lopadium biferum var. biferum (Nyl.) Zahlbr., Cat. Lich. Univers. 4: 300 (1926)