Grass Valley speckled dace

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.^[1]

Grass Valley speckled dace
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Cypriniformes
Family:	Leuciscidae
Genus:	Rhinichthys
Species:	R. osculus
Subspecies:	†R. o. reliquus
Trinomial name
†Rhinichthys osculus reliquus Hubbs & Miller, 1972