tetragonous, Syngnathus Mitchill [S. L.] 1814:28 [Report, in part, of Samuel L. Mitchill; ref. 3030] Not available, no description, from New York [as "is probably our little sea-horse"]. •In the synonymy of Hippocampus erectus Perry 1810 -- (Lourie et al. 1999:91 [ref. 23993], Kuiter 2009:19 [ref. 30404]). Nomen Nudum. Current status: Synonym of Hippocampus erectus Perry 1810. Syngnathidae: Syngnathinae.