The Grass Valley speckled dace (Rhinichthys osculus reliquus) is an extinct subspecies of fish that occurred in a single spring-fed creek in a grassy meadow in eastern Lander County, Nevada.

Specimens were collected only once in 1938, and it was then considered common.

[1] The species had a distinctive speckled lower lip and silver sided body.

The introduction of brook and rainbow trout to the creek is believed to be the reason for their extinction.

This Leuciscidae article is a stub.