Weevil
Guides
Trichapion reconditum
Trichapion reconditum is a species of straight-snouted weevil in the family Brentidae. It is a small beetle with an elongated rostrum, characteristic of the family. The species has been documented in eastern Canada, with records from New Brunswick, Ontario, and Quebec. It appears to be rarely encountered, with very few observations in citizen science databases.
Trichapion sayi
Trichapion sayi is a species of seed weevil in the family Apionidae. Members of the genus Trichapion are characterized by their distinctive elongated snouts and association with leguminous host plants. The species epithet honors Thomas Say, a pioneering American entomologist. Like other apionid weevils, this species likely develops in seeds or other plant tissues, though specific biological details remain poorly documented in accessible literature.
Trichapion tenuirostrum
Trichapion tenuirostrum is a species of straight-snouted weevil in the family Brentidae. The genus Trichapion is distinguished by its elongate, slender rostrum and association with leguminous host plants. This species is recorded from the Canadian prairie provinces. Like other members of the genus, it likely develops in seeds or pods of Fabaceae, though specific host associations for this species remain poorly documented.
Trichobaris compacta
datura weevil
Trichobaris compacta is a flower weevil in the family Curculionidae, commonly known as the datura weevil. The species has been documented from the southwestern United States through the Pacific coastal ranges of Mexico to the Tehuantepec Isthmus. Genetic analysis indicates it forms a single genealogical lineage with admixed population structure, showing no geographic barriers to gene flow across its range despite utilizing different host plant species in different regions.
Trichobaris mucorea
tobacco stalk borer
Trichobaris mucorea is a flower weevil in the family Curculionidae, commonly known as the tobacco stalk borer. The species is specialized on host plants in the genus Nicotiana, particularly Nicotiana attenuata, where it completes most of its life cycle concealed within stems. Adult females use volatile chemical cues to select oviposition sites, though these cues do not necessarily predict larval performance. The species is native to North America.
Trichobaris texana
Trichobaris texana is a species of weevil in the family Curculionidae, described by LeConte in 1876. It is currently treated as a subjective junior synonym of Trichobaris pellicea (Boheman, 1844), though some sources list it as provisionally accepted. The genus Trichobaris contains species associated with Solanaceae host plants.
Trichodirabius longulus
flower weevil
Trichodirabius longulus is a species of flower weevil in the family Curculionidae. It was described by Thomas Lincoln Casey in 1920. The species is known from North America. As a member of the flower weevil group, it likely associates with flowering plants, though specific biological details remain poorly documented.
Trichomagdalis
Trichomagdalis is a genus of weevils in the family Curculionidae, described by H.C. Fall in 1913. The genus comprises approximately six species, all described by Fall in the same publication. These beetles are classified as 'wedge-shaped bark weevils,' indicating an association with woody substrates. The genus is part of the hyperdiverse weevil family Curculionidae, one of the largest animal families.
Trichomagdalis atrata
wedge-shaped bark weevil
Trichomagdalis atrata is a species of weevil in the family Curculionidae, first described by Henry Clinton Fall in 1913. The species belongs to the genus Trichomagdalis, whose members are commonly referred to as wedge-shaped bark weevils. Little is known about the specific biology of this species, though its genus name suggests association with bark habitats. The species is recognized as valid in current taxonomic databases.
Trichomagdalis conspersa
wedge-shaped bark weevil
Trichomagdalis conspersa is a species of wedge-shaped bark weevil in the beetle family Curculionidae, described by Fall in 1913. It is found in North America. The genus Trichomagdalis belongs to the bark weevil group, though specific ecological details for this species remain poorly documented.
Trichosirocalus
rosette weevils, crown weevils
A genus of small true weevils native to the Palearctic region. Several species have been widely introduced to North America, Australia, and New Zealand as biological control agents for invasive thistles. The genus was historically treated as containing a single species, T. horridus, but integrative taxonomic studies using molecular and morphological data have revealed multiple distinct species with different host associations.
weevilbiological-controlthistleinvasive-species-managementCeutorhynchinaerosette-feederCeutorhynchiniBaridinaetaxonomic-revisionclassical-biological-controlCarduusCirsiumOnopordumPalearctic-nativeintroduced-speciesmolecular-systematicsintegrative-taxonomyunivoltineleaf-mineragricultural-pest-controlpasture-weed-managementspecies-complexhost-specificitymusk-thistleplumeless-thistleScotch-thistleIllyrian-thistlewelted-thistleItalian-thistlecrown-weevilrosette-weeviloviposition-behavioroverwinteringegg-stagelarval-stageadult-stagedecaying-organic-mattersoil-surfacenon-photosynthetic-leavesgreen-leavesleaf-midribspetiolesleaf-miningnotching-damagerosette-survivalflowering-stem-reductionseed-production-reductionrosette-mortalitypopulation-density-effectsmark-recapturedispersal-patternsartificial-diet-rearinglaboratory-culturevitamin-supplementationlyophilized-thistle-rootsergosterolcasein-hydrolysate7-dehydrocholesterolsucroselarval-survivaladult-longevityovipositionfemale-fecundityfield-cage-experimentsindividual-cage-experimentsgrowth-parameter-reductionpre-release-host-specificity-testingpost-release-monitoringestablishment-successrange-expansionforested-areasagricultural-landpasturesmall-farmscropsdisturbed-habitatsmeadowsdense-patchesrosette-size-preferencespatial-distributionselective-ovipositionautumn-egg-layingwinter-larval-developmentspring-pupationlate-summer-adult-emergencesoil-overwinteringplant-debris-overwinteringrachisleaf-dissectiondestructive-samplingnon-destructive-samplingsampling-biaslife-stage-detectionestablished-populationsmitochondrial-COInuclear-EF-1αmorphological-charactershost-plant-associationssynonymyspecies-validityintroduction-historyrelease-recordsestablishment-recordsOld-World-nativeNew-World-introductionSouthern-Hemisphere-introductionAustraliaNew-ZealandNorth-AmericaVirginiaSouthwest-VirginiaEuropeSpainFranceGermanyItalySwitzerlandAustriaScandinaviaDenmarkNorwaySwedenColonnelli-1979Panzer-1801Alonso-Zarazaga-&-Sánchez-Ruiz-2002Ceutorhynchinae-vs-Baridinaesubfamily-placementtribe-placementtrue-weevilsCurculionidaeColeopteraInsectaArthropodaAnimalia882-iNaturalist-observationsGBIF-recordsCatalogue-of-Life-acceptedNCBI-TaxonomyBulletin-of-Entomological-ResearchJournal-of-Applied-EcologyJournal-of-Entomological-ScienceAnnals-of-the-Entomological-Society-of-AmericaEnvironmental-EntomologyDOI-10.1017/s000748531500084xDOI-10.1046/j.1365-2664.2002.00747.xDOI-10.18474/0749-8004-22.4.324DOI-10.18474/0749-8004-22.4.330DOI-10.18474/0749-8004-24.4.465DOI-10.1093/aesa/73.6.694DOI-10.1093/ee/10.5.691Trichosirocalus horridus
Thistle Crown Weevil, Musk Thistle Crown Weevil
Trichosirocalus horridus is a Palearctic weevil introduced to North America in 1974 as a biological control agent for exotic thistles in the genera Cirsium and Carduus. Native to Europe, it has established populations across the United States, particularly in Virginia where it spread from 609 km² in 1981 to 4,345 km² by 1985. Adults feed on thistle rosettes while larvae develop internally in stems and crowns, causing significant damage to host plants. The species has shown nontarget impacts, feeding on native Cirsium species in Nebraska and Tennessee at rates comparable to target weeds.
Triglyphulus
Triglyphulus is a genus of weevils in the family Curculionidae, subfamily Entiminae, described by Cockerell in 1906. It belongs to the tribe Byrsopagini, a group of broad-nosed weevils. The taxonomic status of this genus has been treated differently across sources, with Catalogue of Life listing it as a synonym under Trichalophus, while GBIF accepts it as a valid genus. The genus is represented by limited observations, with only 12 records documented on iNaturalist.
Trigonoscuta miguelensis
broad-nosed weevil
Trigonoscuta miguelensis is a species of broad-nosed weevil in the family Curculionidae, first described by Pierce in 1975. It belongs to the subfamily Entiminae, a group characterized by their broad, short rostrums. The species is known from California and is part of the North American weevil fauna. Like other members of its genus, it likely inhabits coastal or near-coastal environments given the specific epithet referencing San Miguel Island or the broader Channel Islands region of California.
Trigonoscuta nicolana
Trigonoscuta nicolana is a species of weevil in the family Curculionidae, described by Pierce in 1975. The genus Trigonoscuta is known to include species that serve as prey for the wasp Cerceris sextoides. Information specific to this species is limited, with only three observations recorded on iNaturalist.
Troezon lutosus
Troezon lutosus is a species of weevil in the family Curculionidae. Very little documented information exists about this species; it has been recorded only twice on iNaturalist. The genus Troezon belongs to the true weevils, a large and diverse group characterized by elongated snouts. Without additional specimen records or published studies, most aspects of its biology remain unknown.
Tropiphorus elevatus
broad-nosed weevil
Tropiphorus elevatus is a species of broad-nosed weevil in the family Curculionidae, first described by Herbst in 1795. It belongs to the subfamily Entiminae and tribe Byrsopagini. Distribution records indicate presence in parts of Europe (Kaliningrad, Leningrad) and eastern North America (Newfoundland and Labrador).
Tropiphorus terricola
Tropiphorus terricola is a broad-nosed weevil in the family Curculionidae. Native to northern Europe, it has been introduced to North America where it has been recorded in eastern Canada and the northeastern United States. The species belongs to the subfamily Entiminae, a group characterized by their broad rostrums and root-feeding larvae.
Tychius
leguminous seed weevils
Tychius is a large genus of weevils (Curculionidae: Curculioninae: Tychiini) containing over 630 described species. The genus is distributed across the Palearctic (approximately 240 species), Afrotropical (45 species, mainly South Africa), Nearctic, and Oriental regions. All species with documented biology are associated with legume host plants in the subfamily Papilionoideae (Fabaceae), particularly tribes Genisteae, Loteae, Galegeae, Trifolieae, and Vicieae. Several species have been introduced from Europe to North America, where they feed on introduced and native legumes.
Tychius meliloti
Sweet Clover Weevil
Tychius meliloti is a small weevil in the tribe Tychiini, native to Europe and introduced to North America. In Canada, it has been recorded from scattered localities in Saskatchewan, Manitoba, Ontario, and Quebec. The species is associated with sweet clover (Melilotus spp.) as host plants. It represents one of four European Tychius species established in North America.
Tychius picirostris
Clover Seed Weevil
Tychius picirostris is a small weevil in the family Curculionidae, native to Europe and introduced to North America where it has become widespread. The species is commonly known as the Clover Seed Weevil due to its association with clover plants (Trifolium spp.). It was first described by Fabricius in 1787 and has since been recorded across the Palaearctic region, including more recent documentation in China. As a seed-feeding specialist, it represents one of several Tychius species that have established outside their native range through human-mediated dispersal.
Tychius soltaui
Tychius soltaui is a species of weevil in the family Curculionidae, described by Casey in 1892. The species was formerly treated as distinct from Tychius hirsutus Clark, which has been synonymized with it. It occurs in North America, with records from the Canadian provinces of Manitoba and Saskatchewan. The species belongs to a genus with Old World origins, with multiple independent dispersal events from Eurasia contributing to the North American fauna.
Tychius sordidus
Tychius sordidus is a species of leguminous seed weevil in the beetle family Curculionidae, first described by LeConte in 1876. The species is found in North America. As a member of the genus Tychius, it belongs to a group of weevils commonly associated with leguminous plants, though specific ecological details for this species remain limited.
Tychius stephensi
red clover seed weevil
Tychius stephensi is a small weevil in the family Curculionidae, commonly known as the red clover seed weevil. The species is native to Europe and has been introduced to North America, where it is now widespread. It is associated with leguminous host plants, particularly species of Trifolium (clover). As a seed weevil, it develops within the seeds of its host plants.
Tyloderma aereum
hidden snout weevil
Tyloderma aereum is a species of weevil in the family Curculionidae, commonly referred to as a hidden snout weevil. It belongs to the genus Tyloderma, which comprises small to medium-sized weevils characterized by concealed rostral features. The species was described by Thomas Say in 1832 and is native to North America.
Tyloderma capitale
hidden snout weevil
Tyloderma capitale is a species of hidden snout weevil in the family Curculionidae. It was described by Wibmer in 1981. The species is known from North America, with confirmed records from Ontario, Canada. Like other members of the genus Tyloderma, it is characterized by a concealed rostrum that gives the group its common name.
Tyloderma circumcaribbeum
hidden snout weevil
Tyloderma circumcaribbeum is a species of hidden snout weevil in the beetle family Curculionidae, described by Wibmer in 1981. It belongs to the genus Tyloderma, a group of small weevils characterized by their cryptic habits. The species is found in North America. Very few observations of this species have been documented.
Tyloderma contusum
hidden snout weevil
Tyloderma contusum is a species of hidden snout weevil in the beetle family Curculionidae. It is found in the United States. As a member of the genus Tyloderma, it belongs to a group of weevils characterized by their concealed rostrum and cryptic habits.
Tyloderma fragariae
strawberry crown borer
Tyloderma fragariae is a hidden snout weevil in the family Curculionidae, commonly known as the strawberry crown borer. The species is a documented agricultural pest of strawberry plants, with larvae boring into crowns and causing significant damage to cultivated crops.
Tyloderma laporteae
hidden snout weevil
Tyloderma laporteae is a species of hidden snout weevil in the beetle family Curculionidae, described by Wibmer in 1981. The species belongs to the genus Tyloderma, which is characterized by concealed rostral structures. It is recorded from North America, though specific ecological details remain poorly documented.
Tyloderma lecontei
hidden snout weevil
Tyloderma lecontei is a species of hidden snout weevil in the family Curculionidae. The species was described by Wibmer in 1981 and is currently provisionally accepted in taxonomic databases. It is found in North America. As a member of the genus Tyloderma, it belongs to a group of weevils characterized by their concealed snout morphology.
Tyloderma marshalli
hidden snout weevil
Tyloderma marshalli is a species of hidden snout weevil in the family Curculionidae, described by Wibmer in 1981. The species is known from North America and belongs to a genus characterized by cryptic habits and concealed rostral structure. Information regarding its biology and ecology remains limited.
Tyloderma variegatum
hidden snout weevil
Tyloderma variegatum is a species of hidden snout weevil in the beetle family Curculionidae. It belongs to the genus Tyloderma, a group of weevils characterized by their concealed snout morphology. The species epithet 'variegatum' suggests variable or mottled coloration, though specific pattern details are not well documented. Very few observations of this species have been recorded.
Xyleborini
ambrosia beetles, xyleborine ambrosia beetles
Xyleborini is a tribe of ambrosia beetles within the subfamily Scolytinae (Curculionidae), comprising highly specialized weevils that cultivate symbiotic fungi for food. The tribe dominates ambrosia beetle faunas across Eurasia and the Americas, with the type genus Xyleborus containing over 500 species, though this genus represents an unnatural grouping of distantly related species. Many Xyleborini are economically significant invasive pests that attack healthy trees, while others are secondary colonizers of dead or dying wood. The tribe exhibits exceptional diversity with numerous genera, many of which are small or monotypic.
Xyleborinus andrewesi
Xyleborinus andrewesi is a small ambrosia beetle in the weevil subfamily Scolytinae. Native to the Old World tropics, it has been widely introduced to the New World. The species is polyphagous and has been recorded from 59 host plants across 29 families. It was synonymized with Xyleborinus mimosae in a 2021 taxonomic revision.
Zascelis
hidden snout weevils
Zascelis is a genus of weevils in the family Curculionidae, commonly referred to as hidden snout weevils. The genus was established by John Lawrence LeConte in 1876 and contains more than 80 described species. These beetles are part of the largest family of beetles, with the genus representing a relatively small but established lineage within the weevils.
Zascelis irrorata
Zascelis irrorata is a species of hidden snout weevil in the family Curculionidae. The species was described by John Lawrence LeConte in 1876. It is known from North America. As a member of the hidden snout weevils, it belongs to a group characterized by particular morphological adaptations of the rostrum.
Zygobarinus
Zygobarinus is a genus of flower weevils in the family Curculionidae, established by W.D. Pierce in 1907. The genus contains a single described species, Zygobarinus coelestinus. As a member of the Curculionidae, it possesses the characteristic rostrum (snout) typical of weevils. The genus is classified within the suborder Polyphaga and infraorder Cucujiformia.
Zygobaris
flower weevils
Zygobaris is a genus of flower weevils in the beetle family Curculionidae, established by John Lawrence LeConte in 1876. The genus contains eight described species, all native to North America. These weevils are associated with flowering plants, though specific ecological details remain poorly documented. The genus is rarely encountered in collections and has received limited study beyond taxonomic description.
Zygobaris nitens
Zygobaris nitens is a species of weevil in the family Curculionidae, first described by John Lawrence LeConte in 1876. It is a North American species with a single iNaturalist observation record, indicating it is rarely encountered or poorly documented. The genus Zygobaris belongs to the superfamily Curculionoidea, the largest group of weevils. Limited information exists regarding its biology, habitat preferences, or ecological role.