![]() Life cycle ĭevelopment takes place mostly within a two-year life cycle. Tribe Curculionini differs from other weevils, and from other Coleoptera, by the unique cone-shaped mandibles that move vertically instead of horizontally. Species in the elephas clade have convex elytra and a dense vestiture hiding the line of the first ventral segment, whereas the glandium clade weevils have flattened elytra and the first ventral segment clearly visible through the sparse scales. ![]() elephas are gathered in the "elephas clade". Other similar species in Europe that live on oaks, such as Curculio pellitus, C. cameliae from Japan is also related to this group. undulatus, all of which are grouped together in the "glandium clade". nucumĬurculio glandium is considered as closely related to C. Differences in antennae features of Curculio glandium (left) and C. Curculio nucum has broader segments of flagellum and the segments are covered with semi-erect hairs which in C. Despite overall similarity, the weevils differ in some morphological details. This species is often confused with another commonly occurring weevil of the same genera – the gland weevil, Curculio glandium, which lives on oaks. The body cover is usually light brown, similar to the colour of mature hazelnuts. The female's snout is as long as the rest of the body, with a reddish end. It occurs in most of Europe, from south Sweden, Finland and Great Britain to the Mediterranean. Its larvae develop in hazel nuts Corylus avellana, being a serious pest in hazelnut orchards. Curculio nucum, the nut weevil, is a medium-sized beetle, with an especially elongated snout, characteristic of the Curculionini tribe of the weevil family ( Curculionidae).
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