Mature larvae and pupae of Cleonis pigra (Scopoli, 1763) (Curculionidae: Lixinae: Cleonini) are morphologically described in detail for the first time and compared with known larvae and pupae of other Cleonini species. The results of measurements and characteristics most typical for larvae and pupae of Cleonini are newly extracted and critically discussed, along with some records given previously. Keys for the determination of selected Cleonini species based on their larval and pupal characteristics are attached. Dyar's law was used for the estimation of a number of larval instars of C. pigra. Descriptions of habitats, adult behavior, host plants, life cycle, and biotic interactions are reported here. Adults and larvae feed on plants from the Asteraceae family only (genera Carduus, Cirsium, Centaurea, and Onopordum). Oviposition occurs on the base of the plant stem or the root neck. In the process of larval development, a fusiform gall forms. C. pigra and Cyphocleonus achates can coexist in the same locality. In open habitats, the weevils become the prey of carnivorous animals.

Administration of Podyji National Park Na Vyhlídce 5 CZ 669 02 Znojmo Czech Republic

Department of Ecology and Environmental Sciences Faculty of Science Palacký University Olomouc Šlechtitelů 27 CZ 783 71 Olomouc Czech Republic

Department of Zoology and Plant Protection Maria Curie Skłodowska University Akademicka 19 20 033 Lublin Poland

Group Function of Invertebrate and Plant Biodiversity in Agro Ecosystems Crop Research Institute Drnovská 507 CZ 161 06 Praha 6 Ruzyně Czech Republic

Independent Researcher 72311 Melitopol Ukraine

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