Cat. Lich. Univers. 7: 336 (1931). Basionym: Lecidea approximans Leight., Trans. Linn. Soc. London 27: 157, tab. XXXV, fig. 1-3 (1869).
Basionym: Lecidea approximans Leight., Trans. Linn. Soc. London 27: 157, tab. XXXV, fig. 1-3 (1869).