[1] Eremias nigrolateralis Rastegar-Pouyani & Nilson, 1998, the black-sided racerunner,[6] was described based on dorsal color patterning differences but is now considered a synonym of E.

[2][3] E. nigrolateralis was considered a species of least concern on the IUCN Red List based on its extensive, suitable habitat, large population, and presumed lack of significant threats.

[6] It is most closely related to Eremias velox, of which it was previously treated as a subspecies, and they share several attributes such as having a wide range distribution across the Iranian Plateau, as well as the number of and shape of their scales.

[3] Other closely related species of Eremias racerunners include  E. kopetdaghica, E. isfahanica, E. lalezharica, E. montana, E. papenfussi, E. strauchi, and E.

[5] It is found in open plains and slopes, typically in areas of low vegetation and gravel surfaces.