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This publication describes a dataset containing information on 1328 occurrences of fishes in the Kuban River Basin, the longest river of Northern Caucasus and representing its own freshwater ecoregion (428 Kuban Ecoregion). All observations have precise geo-referencing with the names of water bodies (rivers, lakes etc.). The dataset is based on both literature data (509 occurrences) and our own sampling (814 occurrences). Observations were carried out between 1889 and 2020. The majority (> 61%) of occurrences in the presented data are published for the first time. This extended dataset contributes significantly to fish fauna survey in the Kuban River ecoregion.

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A review of the species of the genus Micronecta from the Northwestern Caucasus with a key is provided. The regional distribution of Micronecta griseola Horváth, M. poweri (Douglas et Scott), and M. pusilla (Horváth) is clarified. Micronecta anatolica anatolica Lindberg is recorded from Russia for the first time.