Poblana letholepis

Poblana letholepis, the La Preciosa silverside is a species of neotropical silverside endemic to Mexico. It was described by Jose Álvarez del Villar in 1950 from types collected from the crater lake of La Preciosa which is 4 km southeast of Alchichica, Puebla State, Mexico at and elevation of 2,365 m.