Weevil
Guides
Cossonus pacificus
Cossonus pacificus is a species of true weevil in the beetle family Curculionidae, described by Van Dyke in 1916. It belongs to the genus Cossonus, a group of small weevils associated with decaying wood and fungal habitats. The species is documented from western North America, with records from the Canadian provinces of Alberta, British Columbia, and Saskatchewan. Like other members of its genus, it likely inhabits moist, decaying woody substrates where fungal growth occurs.
Cossonus ponderosae
Cossonus ponderosae is a species of true weevil in the beetle family Curculionidae. It was described by Van Dyke in 1915. The species is found in North America. As a member of the genus Cossonus, it belongs to a group of weevils that are generally associated with wood-boring or bark-associated habits, though specific ecological details for this species remain poorly documented.
Craponius
minute seed weevils
Craponius is a genus of minute seed weevils in the beetle family Curculionidae, established by John Lawrence LeConte in 1876. The genus contains at least three described species, including Craponius inaequalis, commonly known as the grape curculio, which is a recognized agricultural pest. Members of this genus are small weevils associated with seeds of various plants.
Crocidema
broad-nosed weevils
Crocidema is a genus of broad-nosed weevils in the beetle family Curculionidae. The genus contains six described species, all described by Van Dyke between 1934 and 1951. Species are restricted to western North America, with distributions in Arizona and California. The genus is classified in the subfamily Entiminae, tribe Byrsopagini.
Crostis boreas
Crostis boreas is a species of weevil in the family Curculionidae, described by Prena and Anderson in 2022. The genus Crostis was established relatively recently in weevil systematics. As a newly described species with limited published information, detailed knowledge of its biology and ecology remains sparse. It belongs to the hyperdiverse weevil family Curculionidae, which contains over 40,000 described species worldwide.
Cryphalini
pygmy borers
Cryphalini is a tribe of minute bark beetles (Scolytinae) comprising extremely small species, many under 2 mm in length. The tribe has undergone major taxonomic revision, with former members now distributed across three tribes based on molecular and morphological evidence. Members of this group are among the most abundant bark beetles globally and include significant agricultural pests.
Cryptolepidus
Cryptolepidus is a genus of broad-nosed weevils in the family Curculionidae, established by Van Dyke in 1936. The genus comprises approximately eight described species, distributed primarily in western North America. Species are found in arid and semi-arid regions, with several named after their type localities in Nevada, Utah, and Colorado. The genus is classified within the tribe Geonemini of the subfamily Entiminae.
Cryptolepidus leechi
Cryptolepidus leechi is a species of broad-nosed weevil described by Ting in 1940. It belongs to the family Curculionidae, the largest family of beetles. The species is known from western North America, with records from California and Nevada.
Cryptorhynchina
hidden-snout weevils
Cryptorhynchina is a subtribe of weevils within the subfamily Cryptorhynchinae, commonly known as hidden-snout weevils. The group has gained scientific attention through fossil evidence showing that at least one extinct species within this lineage served as an orchid pollinator approximately 20–45 million years ago. No present-day members of this subtribe have been documented carrying orchid pollinaria, though this absence may reflect their secretive behavior rather than lack of ecological interaction.
Cryptorhynchus
hidden snout weevils
Cryptorhynchus is a genus of hidden snout weevils in the family Curculionidae, containing at least 480 described species. The genus name derives from Greek roots meaning 'hidden' and 'snout,' referring to the concealed rostrum characteristic of these beetles. The genus includes economically significant species such as Cryptorhynchus lapathi, the poplar-and-willow borer, which is a major pest of Salix and Populus species in North America and elsewhere.
Cryptorhynchus helvus
hidden snout weevil
Cryptorhynchus helvus is a species of hidden snout weevil in the beetle family Curculionidae. It was described by LeConte in 1878. The species is known from North America. Members of the genus Cryptorhynchus are characterized by a concealed rostrum, with the snout fitting into a groove between the forelegs when at rest.
Cryptorhynchus tristis
hidden snout weevil
Cryptorhynchus tristis is a species of hidden snout weevil in the beetle family Curculionidae. It was described by Sturm in 1826. The species is found in North America. Like other members of the genus Cryptorhynchus, it likely exhibits the characteristic behavior of drawing its rostrum back into a ventral groove when disturbed.
Curculio
acorn weevils, nut weevils
Curculio is a genus of weevils in the family Curculionidae, commonly known as acorn weevils or nut weevils. Females use their elongated rostrum to bore holes in developing nuts of oak, hickory, and other trees to deposit eggs. Larvae develop inside the seeds, feeding on the nutritious kernel, then emerge in autumn to pupate in soil. The genus has been extensively studied due to its economic impact on nut production and its remarkable morphological adaptations for seed predation.
Curculio confusor
Curculio confusor is a species of true weevil in the family Curculionidae, first described by Hamilton in 1893. It belongs to the genus Curculio, a group of weevils commonly known as acorn or nut weevils due to their association with hard mast. The species is known from North America, with confirmed records from Ontario, Canada.
Curculio fulvus
Curculio fulvus is a species of true weevil in the beetle family Curculionidae. It was described by Chittenden in 1927 and is provisionally accepted in taxonomic databases. The specific epithet 'fulvus' refers to a tawny or yellowish-brown coloration. As a member of the genus Curculio, it shares the characteristic elongated rostrum (snout) typical of nut and acorn weevils. Very little species-specific information is available in the provided sources.
Curculio iowensis
Curculio iowensis is a species of true weevil in the beetle family Curculionidae. The species was described by Thomas Lincoln Casey in 1910. It is found in North America, with records from Canada (Manitoba, Nova Scotia, Ontario, and Québec). Very little is known about the biology or ecology of this species. As a member of the genus Curculio, it likely shares the characteristic elongated rostrum typical of acorn and nut weevils, though specific morphological details remain undocumented in available sources.
Curculio longidens
Curculio longidens is a species of weevil in the family Curculionidae, first described by Chittenden in 1927. It belongs to the genus Curculio, a large and widespread group of weevils commonly known as acorn and nut weevils. The species is documented from North America, though specific details about its biology and ecology remain poorly recorded in available literature.
Curculio obtusus
Hazelnut Weevil
Curculio obtusus, commonly known as the hazelnut weevil, is a species of true weevil in the family Curculionidae. It is native to eastern North America and is one of four globally recognized hazelnut-feeding weevil species in the genus Curculio. The species is considered the most understudied of the hazelnut-feeding Curculio species, as commercial hazelnut production was historically not possible in its geographic range until the development of cold-hardy and disease-resistant hybrid hazelnut plants. It is expected to pose increasing economic concerns as hybrid hazelnut production expands in the United States.
Curculio orthorhynchus
Curculio orthorhynchus is a species of true weevil in the family Curculionidae, first described by Chittenden in 1908 under the basionym Balaninus orthorhynchus. The species is native to North America and belongs to the genus Curculio, a group of weevils commonly known as acorn or nut weevils due to their association with developing nuts and fruits. Very little specific biological information has been published for this particular species.
Curculio pardalis
Curculio pardalis is a species of true weevil in the beetle family Curculionidae, first described by F.H. Chittenden in 1908. It belongs to the genus Curculio, which includes numerous nut- and acorn-feeding weevils. The species is known from North America, with records from the Canadian provinces of Manitoba, Ontario, and Québec. Like other members of its genus, it likely develops within nuts or acorns, though specific host associations remain unconfirmed.
Curculio rubidus
Curculio rubidus is a weevil species in the family Curculionidae, first described by Gyllenhal in 1835. Like other members of the genus Curculio, it possesses the characteristic elongated rostrum typical of acorn and nut weevils. The species is recorded from Belgium based on distribution data, though detailed biological information remains limited in published sources.
Curculio uniformis
Filbert Weevil
Curculio uniformis, commonly known as the filbert weevil, is a species of true weevil in the family Curculionidae. The species is recognized as a nut-feeding specialist associated with filberts (hazelnuts). Like other members of the genus Curculio, it possesses the characteristic elongated rostrum used for drilling into nuts to oviposit. The species is recorded from North America, including British Columbia, Canada.
Curculio victoriensis
Curculio victoriensis is a species of true weevil in the family Curculionidae, described by F.H. Chittenden in 1903. The species is endemic to North America. Two subspecies are recognized: Curculio victoriensis victoriensis (the nominate subspecies) and Curculio victoriensis fulvus Chittenden.
Curculioninae
flower weevils, acorn and nut weevils
Curculioninae is the largest subfamily of weevils (Curculionidae), containing over 23,500 described species in approximately 2,200 genera. 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 adult feeding on plant reproductive structures.
Cyclominae
Cyclominae is a subfamily of weevils (Curculionidae) comprising seven tribes: Amycterini, Aterpini, Cyclomini, Dichotrachelini, Hipporhinini, Listroderini, Notiomimetini, and Rhythirrinini. The subfamily exhibits a disjunct global distribution, with significant radiations in southern South America, southern Africa, Australia, and the western Mediterranean region. Phylogenetic studies indicate complex evolutionary relationships among constituent tribes, with some Palaearctic genera showing closer affinities to South American lineages than to geographically proximate relatives.
Cyclorhipidion pelliculosum
Cyclorhipidion pelliculosum is a species of ambrosia beetle in the weevil family Curculionidae, described by Hulcr & Cognato in 2010. Like other members of its genus, it is likely associated with fungal cultivation in wood, though specific biological details remain poorly documented. The species has been recorded from both North America and Southern Asia.
Cyladini
Cyladini is a tribe of weevils in the family Brentidae, subfamily Apioninae. The tribe includes economically significant pests of sweet potato, particularly the sweetpotato weevil (Cylas formicarius), which causes substantial damage to storage roots in tropical and subtropical production regions. Members of this tribe are characterized by their association with Convolvulaceae host plants and their status as specialized root-feeding pests.
pestagriculturesweet-potatoConvolvulaceaeintegrated-pest-managementCylas-formicariustropical-agriculturesubtropical-agricultureroot-feeding-weevilstorage-root-damageeconomic-pestbiological-controlcrop-protectionsoutheastern-United-Statesglobal-food-securitylow-input-farmingdrought-tolerant-cropnematode-interactionsBeauveria-bassianaentomopathogenic-nematodesresistant-varietiescrop-rotationcover-cropsIPMBrentidaeApioninaeColeopteraInsectaHexapodaArthropodaAnimaliaClaire-SchloemerAuburn-UniversityUniversity-of-Wisconsin-MadisonJournal-of-Integrated-Pest-ManagementScott-GrahamKathy-LawrenceCovingtonBonitaBeauregardOrleansguava-root-knot-nematoderoot-knot-nematodewirewormcucumber-beetleflea-beetlePurpureocillium-lilacinumbiopesticidegreen-bridge-effectmustardglucosinolatepeanutbahiagrasssandy-soildrought-adaptationbiofuelanimal-feednutritional-valuefood-securitysustainable-agricultureenvironmental-impactmicrobial-controlfungal-pathogenentomopathogenic-fungusbiological-nematicidenematode-egg-parasitismpest-managementagricultural-entomologycrop-lossyield-reductionroot-qualitymarketabilityintegrated-managementcultural-controlselective-chemical-useproductivitynatural-processesversatilityglobal-cultivationtropical-regionssubtropical-regionssoutheastern-U.S.domestic-productionrevenueacreageharvestfarminggrowerbreedingresearchcultivar-developmentevolving-threatspest-pressuresoil-healthfield-preparationwinter-habitatinsect-habitatparasitisminfestationdamagelosschallengedefensearsenalbattlewarresilienceadaptationinnovationstrategysustainabilitylivelihoodnourishmentfood-productionagricultural-researchentomologyplant-protectioncrop-sciencehorticultureroot-croptuberstorage-organfeeding-injurygallingcracked-rootsstunted-growthwater-uptakenutrient-uptakepathogen-interactionexacerbated-damagevariety-selectionhardy-varietyrobust-performancehigh-yieldnematode-resistancepest-resistancevulnerabilityspreading-pestpopulation-reductionsoil-improvementspring-plantingtoxic-compoundnatural-propertymicrobial-productformulationapplicationevaluationmaximizationpotentialurgencygrowing-threatcomprehensive-strategybalanceenablementessential-cropsecuritydefiancedifficult-conditionsmenacing-pestsformidable-threatsproduction-continuationface-to-facethreatdiseaseresilient-cropgrowing-conditionsmenacestorysurfacebeneathrelentlessadversaryfavorconditionpowerfulfoetinyparasiteattackformationdiminishabilityresultunattractiveworsematterinteractionsignificantdevastatingruininflictfurthercompromisegrapplethankfullyfarmerbeginselecthardywithstandtraditionalgaintractionvulnerablehighlightneedcontinuebreedeffortdevelopcapableopposeevolveaftersturdyculturalmanagementrotationcovercroppinglinetakeyearoffgrowrotatenon-hostproveeffectivereducepopulationbreathelifeimprovehealthsuppressprepareexamplecontaincompoundcallbreakdownreleasesubstancewaryproviderepresentmethodharnesshelpwinsporefungusinfectkilltypetapdifferentmicroscopicanimalparasitizeplususecombatattentioneggaidfightminimizeimpactdespiteadvancequestionremainrequiremaximizeparticularlyurgentposekeyenhanceapproachintegratepracticecontrolselectivechemicalenablenaturalprocessnutritionalvalueessentialcropglobalfoodregionsupportmillionaddresspressureinnovativesustainableensurelivemanyformidableproductionalthoughcomefaceresilientabledefydifficultreadmorejournalintegratedClaireSchloemerPh.D.studentconductearnmasterdegreeemailsharelinkfriendopennewwindowprintFacebookLinkedInBlueskyMastodonXRedditThreadsrelateddiscoverfromtodaysubscribegetlatestpostsendyourCylasformicariussweetpotatosweetpotatoweevilphotocourtesyshowherecucumberbeetleroot-knotnematodeharmU.S.guidedetailvarietyoptionbeloveddelicioustastebenefitbrightcolorrankseventhmostimportantworldtropicalsubtropicalareaaroundservefeedsourcegoodpicklow-inputstylewelladaptedsandysoildroughtUnitedStates2022over130,000acregeneratenearly600southeasternleaddomesticAuburnUniversityweatherarticlepublishMarchcolleagueScottGrahamKathyLawrencevariousamongplant-parasiticspecificallyrootsystemcausegallplantwaternutrientstuntedgrowthyieldcrackmakeinteractpathogenexacerbateinsectknowstorage7annualsouthernfleaqualityleaveeconomicownresistancebettermeanwhilenewerhighrobustperformancehoweverresistguavaspeciesspreadnextseasonwinterfieldspringtoxicgreenbridgeeffecthabitatfeedersymptominfectionbiologicalpropertymicrobeBeauveriabassianaagentformulateenvironmentallyfriendlyproducteasyapplysimilarlybeneficialentomopathogenicnematicidePurpureocilliumlilacinumsolutionenvironmentalresistantnematode-resistantcultivarcomprehensivecultivationWisconsin-MadisoncschloemerwisceduCylindrocopturinus pictus
Cylindrocopturinus pictus is a species of true weevil in the beetle family Curculionidae, first described by Sleeper in 1963. It belongs to the genus Cylindrocopturinus, a group of weevils within the diverse Curculionidae family. The species has a documented distribution across North America, Central America, and the Caribbean.
Cylindrocopturus binotatus
A true weevil in the family Curculionidae. Found in North America. Limited published information exists on this species.
Cylindrocopturus cretaceus
Cylindrocopturus cretaceus is a weevil species in the family Curculionidae, first described by Van Dyke in 1929-30. The genus Cylindrocopturus includes stem-boring weevils associated with plants in the Asteraceae family, particularly sunflowers. The specific epithet 'cretaceus' (Latin for chalky or chalk-white) may refer to coloration characteristics.
Cylindrocopturus dehiscens
Cylindrocopturus dehiscens is a species of weevil in the family Curculionidae. It belongs to a genus associated with sunflowers (Helianthus spp.) and related plants in the Asteraceae family. The genus Cylindrocopturus includes several species that are recognized as sunflower pests, particularly as stem-borers during their larval stages.
Cylindrocopturus deleoni
Cylindrocopturus deleoni is a species of weevil in the family Curculionidae, first described by Buchanan in 1940. It belongs to the genus Cylindrocopturus, which includes several species associated with sunflower and other Asteraceae hosts. The species is recorded from western North America, specifically Alberta and British Columbia in Canada. Like other members of its genus, it is likely a stem-boring weevil with larvae that develop within host plant stems.
Cylindrocopturus eatoni
pine reproduction weevil
A weevil species in the family Curculionidae, commonly known as the pine reproduction weevil. Adults are black with dense grayish scales and are capable fliers, though they frequently hop when disturbed. The species is a documented pest of young ponderosa pine (Pinus ponderosa) and Jeffrey pine (P. jeffreyi), attacking reproductive structures and bark. It has been observed in Oregon and is associated with coniferous forest habitats.
Cylindrocopturus longulus group
The Cylindrocopturus longulus group represents a species complex within the weevil genus Cylindrocopturus, closely related to C. adspersus (Sunflower Stem Weevil). Members of this group are stem-boring weevils associated with sunflowers (Helianthus spp.). The group designation indicates taxonomic uncertainty, with specimens potentially representing an undescribed species. Like other Cylindrocopturus species, these weevils likely complete their life cycle within sunflower stems, with larvae boring downward through pith tissue.
Cylindrocopturus mediinotus
Cylindrocopturus mediinotus is a species of true weevil in the family Curculionidae. It is found in North America. The species was originally described by Fall in 1906 and has been treated as a synonym of Copturus mediinotus in some taxonomic databases. Like other members of the genus Cylindrocopturus, it is associated with sunflower plants, though specific ecological details for this species are limited in available literature.
Cylindrocopturus nanulus
Cylindrocopturus nanulus is a species of true weevil in the family Curculionidae. It is native to North America. Very little specific information is available about this species; it belongs to a genus containing several sunflower-associated stem weevils, but direct observations linking C. nanulus to particular host plants or economic impacts have not been documented.
Cylindrocopturus nubilatus
Cylindrocopturus nubilatus is a species of weevil in the family Curculionidae. It belongs to a genus containing several species associated with sunflowers and related plants. The genus Cylindrocopturus includes the well-documented sunflower stem weevil C. adspersus, a significant agricultural pest, but specific information on C. nubilatus remains limited. Observations of this species are sparse, with only four records documented on iNaturalist.
Cylindrocopturus operculatus
Cylindrocopturus operculatus is a species of true weevil in the beetle family Curculionidae. It is found in North America. The genus Cylindrocopturus includes several species associated with sunflowers and related plants, though specific ecological details for C. operculatus remain poorly documented in published literature.
Cylindrocopturus tetralobus
Cylindrocopturus tetralobus is a species of weevil in the family Curculionidae, described by Champion in 1906. The genus Cylindrocopturus includes species associated with sunflowers and related plants, though specific ecological details for C. tetralobus remain undocumented in available sources. The species is provisionally accepted in taxonomic databases with minimal published information on its biology or distribution.
Cylindrocopturus undescribed-nr-princeps
An undescribed species in the genus Cylindrocopturus, closely related to C. princeps. Members of this genus are weevils in the family Curculionidae, characterized by cylindrical body forms and association with coniferous hosts. This taxon represents a distinct lineage currently recognized through morphological or molecular differentiation from described species, but awaiting formal taxonomic description.
Cyphicerini
Oriental Broad-nosed Weevils
Cyphicerini is a tribe of weevils in the subfamily Entiminae, commonly referred to as Oriental Broad-nosed Weevils. The tribe contains approximately 134 genera and is characterized by its distribution across Oriental biogeographic regions. Members of this tribe possess the broad rostrum typical of entimine weevils.
Cyphocleonus
Cyphocleonus is a genus of true weevils (Curculionidae) containing at least nine described species. Several species have been investigated for biological control of invasive plants, with C. achates established in North America for knapweed management and C. trisulcatus evaluated for oxeye daisy control. The genus is native to Eurasia, with some species now introduced to North America.
Cyrtepistomus
oriental broad-nosed weevils
Cyrtepistomus is a genus of oriental broad-nosed weevils in the family Curculionidae, containing at least 20 described species. The genus is native to Asia, with some species introduced to North America. One well-documented species, Cyrtepistomus castaneus, is known as the Asiatic oak weevil and has established populations feeding on oak trees in North American forests.
Cyrtobagous
salvinia weevil
Cyrtobagous is a genus of small weevils in the family Curculionidae, native to South America. The genus contains species specialized as biological control agents for invasive aquatic ferns in the genus Salvinia. C. salviniae has been introduced to multiple continents to manage giant salvinia (Salvinia molesta), while C. singularis has more limited effectiveness. Both species complete their life cycles within or on their host plants in aquatic environments.
Cyrtobagous salviniae
salvinia weevil, Kariba Weed Biocontrol Weevil
Cyrtobagous salviniae is a subaquatic weevil native to Brazil, widely distributed as a classical biological control agent for invasive aquatic ferns of the genus Salvinia. It has proven effective in reducing infestations of Salvinia molesta and Salvinia minima in tropical and subtropical regions, with documented population reductions exceeding 90% in under one year in some cases. The species is subject to natural enemy pressure from pathogens such as Helicosporidium sp., which can reduce its reproductive output and efficacy.
Dendrocranulus
Dendrocranulus is a genus of weevils in the family Curculionidae, established by Schedl in 1938. The genus is poorly known, with minimal published literature and very few documented observations. Based on its taxonomic placement within Curculionidae, members are likely small to medium-sized beetles with the characteristic elongated snout (rostrum) typical of weevils. The genus name suggests an association with trees ('dendro-' meaning tree, 'cranulus' possibly referring to the head or a small structure).
Derelomus subcostatus
Derelomus subcostatus Boheman, 1844 is a flower weevil (Curculionidae: Derelomini) now synonymized with D. chamaeropis (Fabricius, 1798). It belongs to the D. ephippiger species group, comprising 12 species associated with male inflorescences of palms (Arecaceae). The species participates in brood-site pollination mutualisms, developing within palm flowers while effecting pollination.
Dermatodini
Dermatodini is a tribe of weevils within the subfamily Entiminae, established by van Emden in 1936. The tribe comprises approximately 20 recognized genera distributed across multiple continents. Some sources treat Dermatodini as a synonym of Cneorhinini, reflecting ongoing taxonomic uncertainty in the classification of broad-nosed weevils. Members of this tribe are morphologically diverse, with several genera exhibiting distinctive eye structures and body forms.
Desmoglyptus
Desmoglyptus is a genus of flower weevils in the beetle family Curculionidae. The genus was established by Thomas Lincoln Casey in 1892. It contains at least two described species: Desmoglyptus arizonicus (described 1920) and Desmoglyptus crenatus (originally described 1876). As a member of Curculionidae, it shares the characteristic rostrum (elongated snout) typical of weevils.
Desmoglyptus arizonicus
flower weevil
Desmoglyptus arizonicus is a species of flower weevil in the family Curculionidae, first described by Casey in 1920. The specific epithet "arizonicus" indicates its association with Arizona, though it is reported from North America generally. As a member of the flower weevil group, it likely occurs on flowering plants, though specific host associations remain undocumented. The genus Desmoglyptus is not well-studied, and detailed biological information for this species is scarce.