Basionym Name:Thelotrema hiatum Hale, Smithson. Contr. bot. 38: 44 (1978)
Homotypic synonyms:Chapsa hiata (Hale) Sipman, in Sipman, Lücking, Aptroot, Chaves, Kalb & Umaña Tenorio, Phytotaxa 55: 38 (2012)