Independence Valley tui chub

The Independence Valley tui chub (Siphateles bicolor isolata) is a subspecies of tui chub endemic to the drainage of the Independence Valley in Elko County, northern Nevada.

Described as "abundant" when first collected and identified in 1965, it was considered extinct within less than a decade due to the introduction of sunfish, bass, and carp to the previously isolated watershed. However, it had been rediscovered by the year 2000, although it remains highly threatened.