Curculioninae

flower weevils, acorn and nut weevils

Tribe Guides

Curculioninae is the largest of weevils (Curculionidae), containing over 23,500 described in approximately 2,200 . It represents one of the most successful radiations of terrestrial animals. The subfamily is divided into around 30 tribes, with members commonly known as flower weevils or acorn and nut weevils based on larval and feeding on plant reproductive structures.

Anthonomus by (c) Paul Cook, some rights reserved (CC BY), uploaded by Paul Cook. Used under a CC-BY license.

Lignyodes pallidus by no rights reserved, uploaded by Chrissy McClarren and Andy Reago. Used under a CC0 license.

Tychius meliloti by (c) Barry Walter, some rights reserved (CC BY), uploaded by Barry Walter. Used under a CC-BY license.

Pronunciation

How to pronounce Curculioninae: /kʊr.kju.li.ˈoʊ.nɪ.neɪ/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Distinguished from other Curculionidae by a combination of morphological features, though exact tribal boundaries vary by classification system. Some tribes are characterized by specific morphological traits: Anthonomini typically have compact antennal funicles of seven antennomeres and tarsal claws with small basal teeth; Tychiini are small weevils often associated with leguminous plants. The subfamily's delimitation is generally robust despite its enormous size, though boundaries with Molytinae remain disputed for certain tribes (Phrynixini, Trypetidini, Itini).

Images

Distribution

. occur across all continents except Antarctica, with documented records from China, West Indies, Cuba, southern Africa, Central America, Russia, and Central Asia. The 's distribution spans tropical semideciduous forests, temperate regions, and various other terrestrial .

Diet

Larvae and feed on reproductive organs of plants, including flowers, seeds, nuts, and acorns. Many are oligophagous, feeding on related plant species within a or . Some tribes show specific associations: Tychiini with leguminous plants (Fabaceae), Anthonomini with various flowering plants including Tiliaceae (Malvales).

Ecological Role

Phytophagous herbivores that function as seed and flower . Some are economically significant pests of cultivated plants and forest trees.

Human Relevance

Includes agricultural and forestry pests. Tachyerges seriatosetosus is a documented pest of poplars (Populus). plant associations have been studied for applications in , pollination , and conservation. The 's enormous diversity makes it significant for studies of insect-plant and speciation.

Similar Taxa

MolytinaeBoundary disputed for several tribes (Phrynixini, Trypetidini, Itini); some authors include these in Curculioninae while others place them in Molytinae. Additionally, Cryptorhynchinae and Ceutorhynchinae are sometimes treated as tribes within Curculioninae rather than separate .

More Details

Tribal classification

The comprises approximately 30 tribes including Anthonomini, Tychiini, Rhamphini, Erodiscini, Acentrusini, Acalyptini, and others. Some remain unassigned to tribes due to unusual or ancient morphological features.

Evolution of host associations

Studies indicate little evidence for strict cospeciation between Curculioninae and their plants. Host shifts appear mediated primarily by ecological factors, particularly associations, rather than phylogenetic constraints. Related weevil may share single host plant species, and many span distantly related plant .