Poblana letholepis, the La Preciosa silverside is a species of neotropical silverside endemic to Mexico.

[2] It was described by Jose Álvarez del Villar in 1950 from types collected from the crater lake of La Preciosa which is 4 kilometres (2.5 miles) southeast of Alchichica, Puebla State, Mexico at and elevation of 2,365 metres (7,759 ft).

[3]

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