Macronychini
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Zaitzevia
riffle beetles
Zaitzevia is a genus of riffle beetles (family Elmidae) comprising approximately 19–29 described species, depending on taxonomic treatment. The genus was established by George Charles Champion in 1923 and is named after Russian entomologist Filipp Zaitsev. Species diversity is concentrated in East, Southeast, and Central Asia, with additional representation in North America. Chinese species are particularly well-documented, with multiple new species described from Sichuan, Yunnan, Hunan, Hubei, and Guizhou provinces.