H. zosterae Jordan & Gilbert 1882

English common names. Dwarf Seahorse.

Synonyms. H. rosamondae Borodin 1928, H. regulus Ginsburg 1933 .

Syntypes. MNHN 1887-0515, CAS-SU 1671 (2), USNM 30852 (2 or 1, not found in 1980).

Type locality. Laguna Grande, Pensacola, Florida .

Distribution. Bahamas, Mexico, USA (Gulf of Mexico).

Notes. The type specimen of H. lichtensteinii is thought to possibly be H. zosterae and to have been mistakenly labelled as being from the Red Sea (Kaup 1856—See Appendix P and Species Inquirenda below). Although populations throughout the Floridian portion of the species’ range exhibit gene flow, mtDNA evidence (1,450 bp, ND4, D-loop, CO1) suggests four distinct subpopulations (overall F ST = 0.47, average nucleotide diversity within populations = 0.49%) (Fedrizzi et al. 2015).