[3][4] They have elbowed antennae that end in clubs, and the first antennal segment often fits into a groove in the side of the rostrum.

[4] Most Curculionidae are sexually dimorphic with females (compared to males) having antennae positioned more basally and a longer, thinner rostrum.

[4] The long rostrum possessed by most adult weevils is used by females to help lay eggs (oviposit) inside plant tissue.

[4] Many species of weevils are common household and garden pests, but don't harm people, pets, or buildings.

Others, however, recognize a lesser number – the only subfamilies that are almost universally considered valid are the Baridinae, Cossoninae, Curculioninae, Cyclominae, Entiminae, Molytinae, Platypodinae, and Scolytinae.

[citation needed] The timeline for current and extant weevil speciation and diversification is consistent with the radiation of gymnosperms during the Mesozoic period.