Basionym Name:Acanthothecium clavuliferum Vain., Acta Soc. Fauna Flora fenn. 7(no. 2): 95 (1890)
Homotypic synonyms:Acanthotheciopsis clavulifera (Vain.) Zahlbr., Cat. Lich. Univers. 2: 448 (1923)Acanthothecis clavulifera (Vain.) Staiger & Kalb, Mycotaxon 73: 96 (1999)Psorographis clavulifera (Vain.) Clem., [as 'clavuliger'] Gen. fung. (Minneapolis): 174 (1909)