Weevils are certain beetles, namely the ones belonging to the superfamily Curculionoidea. They are usually small, less than 6 mm (0.24 in), and herbivorous. About 97,000 species of weevils are known. They belong to several families, with most of them in the family Curculionidae. Some other beetles, although not closely related, bear the name "weevil", such as the biscuit weevil, which belongs to the family Ptinidae.
Anthonomus is a genus of weevils. This genus includes major agricultural pests such as the boll weevil, strawberry blossom weevil, and pepper weevil, as well as promising biological pest control agents such as Anthonomus santacruzi.
The beetle subfamily Curculioninae is part of the weevil family Curculionidae. It contains over 23,500 described species in 2,200 genera, and is therefore the largest weevil subfamily. Given that the beetle order (Coleoptera) contains about one-quarter of all known organisms, the Curculioninae represent one of the – if not the – most successful radiations of terrestrial Metazoa.
Caridae is a small Gondwanan family of weevils. They are considered part of the primitive weevil group, because they have straight rather than elbowed antennae. The insertion of the antennae on the rostrum cannot be seen from above. Caridae also lack spiracles on abdominal tergites 6 and 7. The prothorax lacks lateral carinae. It has been suggested that the fossil weevil Eccoptarthrus belongs in this family, which would result in a change in the family name ; this proposal has been rejected by most coleopterists (e.g.)
The Attelabidae is a widespread family of weevils. They are among the primitive weevils, because of their straight antennae, which are inserted near the base of the rostrum. The prothorax is much narrower than the base of the elytra on the abdomen. Attelabidae and the related family Rhynchitidae are known commonly as the leaf-rolling weevils. Rhynchitidae may be treated as subfamily Rhychitinae of the Attelabidae.
Nemonychidae is a small family of weevils, placed within the primitive weevil group because they have straight rather than elbowed antennae. They are often called pine flower weevils. As in the Anthribidae, the labrum appears as a separate segment to the clypeus, and the maxillary palps are long and projecting. Nemonychidae have all ventrites free, while Anthribidae have ventrites 1-4 connate or partially fused. Nemonychidae lack lateral carinae on the pronotum, while these are usually present, though may be short, in Anthribidae.
The Entiminae are a large subfamily in the weevil family Curculionidae, containing most of the short-nosed weevils, including such genera as Otiorhynchus, Phyllobius, and Sitona. Some of these weevils are notorious pests of major economic importance.
Rhynchophorus is a genus of beetles in the weevil family, Curculionidae. Palm weevils of the genus Rhynchophorus are major pests of coconut palms throughout the tropics.
Acalles ptinoides is a species of weevil native to Europe.
Archarius pyrrhoceras is a species of weevil native to Europe.
Ceutorhynchus obstrictus is a species of weevil native to Europe.
Ceutorhynchus pallidactylus is a species of weevil native to Europe.
Coeliodes ruber is a species of weevil native to Europe.
Glocianus punctiger is a species of weevil native to Europe.
Gymnetron antirrhini is a species of weevil native to Europe.
Orchestes fagi is a species of weevil native to Europe. The larvae mine the leaves of beech. It is an invasive species in Canada where it is damaging to American beech.
Phytobius leucogaster is a species of weevil native to Europe.
Rhamphus oxyacanthae is a species of weevil native to Europe.
Thamiocolus viduatus is a species of weevil native to Europe.
Dorytomus mannerheimi is a species of true weevil in the beetle family Curculionidae. It is found in North America.
