Basionym Name:Pyrenula nitidella var. nigrescens B. de Lesd., Recherch. Lich. Dunkerque: 258 (1910)
Homotypic synonyms:Pyrenula nitida f. nigrescens (B. de Lesd.) Keissl., Rabenh. Krypt.-Fl., Edn 2 (Leipzig) 9.1(2): 415 (1937)