Basionym Name:Calicium trachelinum var. hispidulum Ach., Lich. Univ.: 237 (1810)
Homotypic synonyms:Calicium hispidulum (Ach.) Ach., K. Vetensk-Acad. Nya Handl. 4: 268 (1816)Chaenotheca chlorella var. hispidula (Ach.) Vain., Acta Soc. Fauna Flora fenn. 57(no. 1): 96 (1927)Chaenotheca hispidula (Ach.) Zahlbr., Cat. Lich. Univers. 1: 567 (1922)Chaenotheca hispidula f. hispidula (Ach.) Zahlbr., Cat. Lich. Univers. 1: 567 (1922)Chaenotheca hispidula var. hispidula (Ach.) Zahlbr., Cat. Lich. Univers. 1: 567 (1922)Phacotium hispidulum (Ach.) Trevis., Flora, Regensburg 45(1): 5 (1862)Phacotrum hispidulum (Ach.) Gray, Nat. Arr. Brit. Pl. (London) 1: 483 (1821)