Biodiversity of Coleoptera (Insecta) in the Middle and Lower Volga Regions (Russia)

(1) Background: The conservation of entomofauna in individual macroregions requires efforts to study the distribution and abundance insects. For this purpose, databases are created that enumerate information. Such databases, with processing significant factual material, make it possible objectively assess status a species and, if necessary, take measures for its protection. aim paper is describe modern Coleoptera fauna nine regions Russia on basis recently published dataset. (2) Methods: We conducted our own studies 1994, 1996, 1998–2003 2005–2022. dataset also includes data from museum specimens other years. used variety methods, such as sifting through litter, searching under bark trees stumps, trapping by light, soil traps, beer window etc. each observation, coordinates find, number individuals observed date were recorded. (3) Results: contains 1469 subspecies 85 families found Volga Region. In total, there 31,433 samples 9072 occurrences (4) Conclusions: largest terms diversity Curculionidae (202 species), Carabidae (145 species) Chrysomelidae (142 species). There 54 northern range boundary macroregion, two southern one an eastern boundary. Twenty-one invasive have been recorded macroregion.