antiquus, Hippocampus Risso [A.] 1827:183 [Histoire naturelle des principales productions de l'Europe méridionale v. 3; ref. 3757] No locality. No types known. Not available; an incorrect subsequent spelling of Hippocampus antiquorum Leach 1814. •In the synonymy of Hippocampus hippocampus (Linnaeus 1758) -- (Wheeler 1973:278 [ref. 7190], Lourie et al. 1999:99 [ref. 23993], Kuiter 2009:58 [ref. 30404], Lourie et al. 2016:27 [ref. 34632]). Misspelling. Current status: Synonym of Hippocampus hippocampus (Linnaeus 1758). Syngnathidae: Syngnathinae. Habitat: brackish, marine.