4) Brachyrhaphis olomina (Meek, 1914);

Poeciliidae .

Olomina Livebearer; Olomina, Alumina, Pepesca (Fig. 3L).

New elevational record (1486 m.a.s.l.); previous records of the species in Costa Rican freshwaters were restricted to 10– 900 m.a.s.l. Basis of the record: Forty-four specimens were captured in an unnamed pound in the Reserva Biológica Monteverde, Altos de San Luis, Monteverde, Puntarenas (10.31667, -84.80932), at 1486 m.a.s.l., on July 6, 2019, by Arturo Angulo.