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Hucho is a genus of large piscivorous Salmonidae fish known as taimens (from Finnish language taimen, 'trout', through ), and is closely related to Pacific trout and (all belonging to the same tribe in the subfamily Salmoninae). Native to the cold rivers and other freshwater habitats in Eurasia, they are threatened by overfishing and habitat loss.
The earliest fossil remains of this genus are known from the Chattian to middle Miocene of the Vitim Plateau in Russia. Younger remains are also known from the Late Miocene of Ukraine and the Late Pleistocene of Germany. Fossil specimens of a Hucho-like salmonid have been recovered from the Clarkia fossil beds and other localities from the late Neogene of western North America, suggesting they may have potentially inhabited North America too.
| Yangtze basin in China |
| endemic to the Danube basin in Europe |
| North Korea and China |
| Siberia |
In addition, the Sakhalin taimen was formerly placed in this genus, but genetics and other evidence has shown that it belongs in its own monotypic genus as Sakhalin taimen.Oleinik, A.G.; and Skurikhina, L.A. (2008). Phylogenetic relationships of Sakhalin taimen Parahucho perryi inferred from PCR-RFLP analysis of mitochondrial DNA. Russian Journal of Genetics, 44:767. Matveev, V.; Nishihara, H.; & Okada, N. (2007). Novel SINE families from salmons validate Parahucho (Salmonidae) as a distinct genus and give evidence that SINEs can incorporate LINE-related 3′-tails of other SINEs. Molecular Biology and Evolution 24(8): 1656–1666.
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