Lichen aquaticus Linnaeus, Species Plantarum 2: 1148. 1753.

"Habitat in Suecia sub aqua, in paludibus." RCN: 8212.

Neotype ( Jørgensen & al. in Bot. J. Linn. Soc. 115: 274, 372. 1994): Sweden. Västergötland, Floda, Nääs, 16 Aug 1919, H. Magnusson (Malme Lich. Suec. Exs. 790) (UPS).

Current name: Dermatocarpon luridum (With.) J.R. Laundon ( Verrucariaceae).