Basionym Name:Pseudopyrenula duplex f. simplicior Vain., Bolm Soc. broteriana, Coimbra, sér. 2 6: 177 (1930)
Homotypic synonyms:Bathelium duplex f. simplicius (Vain.) C.W. Dodge, Ann. Mo. bot. Gdn 40: 290 (1953)Trypethelium duplex f. simplicius (Vain.) Zahlbr., Cat. Lich. Univers. 10: 101 (1938)