Basionym Name:Lecidea crassa Nees ex Stizenb., Ber. Tät. St Gall. naturw. Ges.: 134 (1891)
Homotypic synonyms:Psora crassa (Nees ex Stizenb.) C.W. Dodge, Beih. Nova Hedwigia 12: 231 (1964)