Basionym Name:Placodium ferdinandii Müll. Arg., [as 'ferdinandi'] Flora, Regensburg 64(32): 508 (1881)
Homotypic synonyms:Acarospora ferdinandii (Müll. Arg.) Hue, Nouv. Arch. Mus. Hist. Nat., Paris, 5 sér. 1(2): 160 (1909)