islandicus, Gasterosteus Sauvage [H.-E.] 1874:20, Pl. 1 (figs. 8-8c) [Nouvelles Archives du Muséum d'Histoire Naturelle, Paris v. 10; ref. 3904] Iceland. Holotype: MNHN 0000-5594 (1 of 3). Type catalog: Bertin & Estève 1950:38 [ref. 19576]. •Synonym of Gasterosteus aculeatus Linnaeus 1758 -- (Monod 1973:283 [ref. 7193], Paepke in Bănărescu & Paepke 2002:209 [ref. 25856]). •Valid as Gasterosteus islandicus Sauvage 1874 -- (Kottelat 1997:165 [ref. 22952], Kottelat & Freyhof 2007:496 [ref. 29996]). •Possible synonym of Gasterosteus aculeatus Linnaeus 1758 -- (Denys et al. 2015:41 [ref. 35420]). Current status: Valid as Gasterosteus islandicus Sauvage 1874. Gasterosteidae. Distribution: Iceland. Habitat: freshwater.