A global revision of the Seahorses Hippocampus Rafinesque 1810 (Actinopterygii: Syngnathiformes): Taxonomy and biogeography with recommendations for further research Sara A. Lourie Riley A. Pollom Sarah J. Foster Zootaxa 2016 4146 1 1 66 3LZNM Piacentino & Luzzatto 2004 Piacentino & Luzzatto 2004 [151,701,388,414] Actinopterygii Syngnathidae Hippocampus Animalia Syngnathiformes 34 35 Chordata species patagonicus   Synonyms.None   Distribution. Argentina, Brazil(south), Uruguay.   Holotype.MACN 8806. Paratypes: MACN 8807, 8808, 8809.    Typelocality.  RíoNegro, San Antonio Oueste,  Bahía, Argentina.  Notes.Molecular research amply supports the diagnosis of  H. patagonicusas a species separate from  H. erectus( Casey et al.2004; González et al.2014; Silveira et al.2014). It is 6.13% divergent from Brazilian  H. erectus(648 bp, CO1, BOLD2016) which in turn is 1.29% divergent from NorthAmerican and Caribbean  H. erectus. 1416636183 [199,736,602,627] San Antonio Oueste 34 35 1 Rio Negro holotype 1416636201 [748,947,602,627] Argentina Bahia 34 35 1 Bahia holotype