The only similar species in the Mexican fritillary's range is the Variegated Fritillary (Euptoieta claudia).
The Variegated Fritillary has black median lines on the upperside of the hindwing, and on the underside of the hindwing it has a pale postmedian band.

Los Tarrales Natural Reserve, Patulul, Suchitepequez, Guatemala, 18 January 2020