Basionym Name:Platygrapha quadrangula Stirt., Proc. Roy. phil. Soc. Glasgow 11: 103 (1879)
Homotypic synonyms:Aulaxina quadrangula (Stirt.) R. Sant., J. Ecol. 40(1): 129 (1952)Lochomyces quadrangulus (Stirt.) Bat., [as 'quadrangularis'] Anais XIII Congr. Soc. bot. Brasil: 430 (1964)Mazosia quadrangula (Stirt.) Zahlbr., Cat. Lich. Univers. 2: 503 (1923)Rotula quadrangula (Stirt.) Müll. Arg., Lich. Epiph. Novi: 19 (1890)