Lichen gelidus Linnaeus, Systema Naturae, ed. 12, 2: 709; Mantissa Plantarunv. 133. 1767.

"Habitat in Islandiae saxis. König.” RCN: 8176.

Neotype (Jørgensen & al. in Bot. J. Linn. Soc. 115: 317, 376. 1994): Iceland. Kjosarsysla, Reykir, 29 Jun 1937, B. Lynge (O).

Current name: Placopsis gelida (L.) Linds. (Trapeliaceae).