Nosatci tribu Cleonini a rodu Lixus (Coleoptera: Curculionidae, Lixinae) v České republice

Abstract: In this paper we present faunistic records of 20 weevil species of the tribe Cleonini and 19 species of the genus Lixus Fabricius, 1801 from the Czech Republic, based on our study of museum and private collections. The following species are published for the first time from the Czech Republic, or formerly doubtful occurrences are confirmed: Coniocleonus cicatricosus (Hoppe, 1795), C. excoriatus (Gyllenhal, 1834), Pachycerus cordiger (Germar, 1819) and Lixus elegantulus Boheman, 1843. Lixus angustus (Herbst, 1795) is new for Bohemia. The formerly doubtful occurrence of Lixus cardui Olivier, 1808 is confirmed in Bohemia. For each species we assign an updated IUCN red list category (cf. Benedikt & Strejček 2005) on the basis of current/historical number of localities (faunistic squares) for each species. The following species, 18% of the total number, are only known from historical records (before 1970) and are now regarded as regionally extinct (RE) in the Czech Republic: Adosomus roridus (Pallas, 1781), Bothynoderes declivis (Olivier, 1807), Coniocleonus cicatricosus (Hoppe, 1795), C. excoriatus (Gyllenhal, 1834), C. hollbergi (Fåhraeus, 1842), Lixus elegantulus Boheman, 1843 and L. neglectus Fremuth, 1983. About half (44%) of the total species are regarded as endangered (EN) or critically endangered (CR), another 20% are classified as vulnerable (VU) or near threatened (NT). Only a small proportion (18%) is regarded as least concern (LC) in the Czech Republic. The causes of endangerment are discussed along with possible measures to improve habitats for Lixinae weevils in the Czech landscape.

Key words: Faunistics, Coleoptera, Curculionoidae, Lixinae, Czech Republic, distribution, bionomics, species conservation