Poecilia mexicana Steindachner, 1863 .

Shortfin molly, Mexican molly; Olomina, Alumina, Bobita, Panzona, Bubucha, Pepesca.

Distribution: Global: North America; from eastern Mexico to western Panama, Atlantic and Pacific drainages; Costa Rica: LN, RF, SJ, SC, Sa, To, Pa, Ma, Si (Atlantic), Ni, Te, Be, Ba, Ta, Pi, Tr and Co (Pacific), 0–1220 m.a.s.l., Sec, Dia.

Occurrence and conservation status: Nat, LC.

References: Bussing (1966: 237, as Poecilia sphenops Valenciennes 1846 —synonym; listed, information on distribution), Bussing (1987: 145, as Poecilia gilii (Kner, 1863), in part—missidentification; 1998: 219, as P. gilii, in part—missidentification; brief description, including illustrations and an identification key, information on distribution, with a map, and ecology), Angulo et al. (2013: 996, as P. gilii, in part—missidentification; listed, including taxonomic information and distributional data) and Bagley et al. (2015: 1; molecular delimitation, taxonomy and information on distribution, including a map).