marginalis, Hippocampus Kaup [J. J.] (ex Heckel) 1856:15 [Catalogue of lophobranchiate fish in the collection of the British Museum; ref. 2575] Mexico. Holotype (unique): NMW 89899. •Synonym of Hippocampus erectus Perry 1810 -- (Lourie et al. 1999:91 [ref. 23993], Castro-Aguirre et al. 1999:235 [ref. 24550], Kuiter 2009:18 [ref. 30404], Lourie et al. 2016:24 [ref. 34632], Fricke et al. 2024:293 [ref. 41622]). Current status: Synonym of Hippocampus erectus Perry 1810. Syngnathidae: Syngnathinae. Habitat: marine.