Distribution and ecology of the weevils of the tribe Bagoini (Coleoptera: Curculionidae) in the Czech Republic

Abstrakt: This study summarises information on the distribution and ecology of weevils of the tribe Bagoini in the Czech Republic. Altogether, 24 species of the genera Bagous Germar, 1817 and Hydronomus Schönherr, 1825 are known from the Czech Republic, with another 11 species occurring in neighbouring countries with potential to also occur in the Czech Republic. Three species (Bagous binodulus (Herbst, 1795), B. brevis Gyllenhal, 1836 and B.majzlani (Kodada, Holecová et Behne, 1992)) probably disappeared from the entire country during the 20th century, and another eight species are known from five or fewer recent localities. Only B. tubulus is common in most of the country, and another four species (H. alismatis (Marsham, 1802), B. lutulentus (Gyllenhal, 1813), B. subcarinatus Gyllenhal, 1836 and B. tempestivus (Herbst, 1795) are locally common and recently known from more than 20 sites. Recently, several species became very rare, especially B. glabrirostris, B. lutosus, B. nodulosus, and B. puncticollis. All species except B. diglyptus Boheman, 1845 are bound to wetlands or water plants, several of them are very rare or endangered. Preservation of peaty meadows, marshes, ponds or water reservoirs with many water and littoral plants and regions with small pools with wetland plants is necessary for the conservation of these interesting weevils.

Klíčová slova: Bagous, Hydronomus, beetles, wetland, water ecosystems, conservation