Curculionidae
Guides
Trichacorynus
Trichacorynus is a genus of true weevils (family Curculionidae) established by Schoenherr in 1833. The genus contains at least three described species: T. brunneus, T. protractus, and T. sulcirostris. As a member of the largest beetle family, species in this genus possess the characteristic elongated rostrum with mouthparts at the tip. Published information on the biology and ecology of Trichacorynus species remains limited.
Trichalophus alternatus
Trichalophus alternatus is a species of broad-nosed weevil in the family Curculionidae, first described by Say in 1831. It is a member of the subfamily Entiminae, which comprises the so-called 'true' weevils characterized by their elongated snouts. The species has been documented across western North America from Alaska to Colorado.
Trichobaris
flower weevils
Trichobaris is a genus of flower weevils in the family Curculionidae, comprising 8–13 described species distributed from the southwestern United States through Mexico. These weevils are specialized herbivores associated with plants in the family Solanaceae, particularly the genus Datura, with which they likely coevolved. Several species are notable agricultural pests, including T. mucorea (tobacco stalk borer) and T. trinotata (potato stalk borer), which also feed on cultivated solanaceous crops. Research on this genus has contributed to understanding host-herbivore coevolution, chemical ecology of host selection, and the decoupling of maternal oviposition cues from larval performance.
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 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
flower weevils
Trichodirabius is a genus of flower weevils in the beetle family Curculionidae, established by Casey in 1920. The genus contains at least four described species, including T. canus, T. industus, T. indutus, and T. longulus. As flower weevils, members of this genus are associated with floral habitats. The genus is part of the diverse Curculionidae family, one of the largest families of beetles.
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 cruzi
Cruz's broad-nosed weevil
Trigonoscuta cruzi is a species of broad-nosed weevil in the family Curculionidae. It was described by Pierce in 1975. The species is found in North America, with distribution records from California. Six subspecies are recognized, including the nominate subspecies and five others described by Pierce in 1975.
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 mohawki
broad-nosed weevil
Trigonoscuta mohawki is a species of broad-nosed weevil in the beetle family Curculionidae. It was described by Pierce in 1975. The species is found in North America, with distribution records from Arizona. As a member of the genus Trigonoscuta, it belongs to a group of weevils that have been documented as prey for certain crabronid wasps, though specific prey records for this species have not been established.
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.
Trigonoscuta stantoni
Santa Cruz Island weevil, Stanton's trigonoscuta weevil, Santa Cruz island shore weevil
Trigonoscuta stantoni is a species of broad-nosed weevil in the family Curculionidae. The species is endemic to the Channel Islands of California, specifically documented from Santa Cruz Island. It is a member of a genus containing several insular species with restricted distributions.
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.
Tropiphorini
Tropiphorini is a tribe of weevils within the subfamily Entiminae, characterized by broad-nosed morphology typical of the group. The tribe was established by Marseul in 1863 and contains approximately 120 genera distributed across multiple continents. Members are primarily ground-dwelling weevils with diverse ecological associations. The tribe has undergone taxonomic revision, with some classifications treating it as a synonym of Byrsopagini.
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 obtusus
Tropiphorus obtusus is a broad-nosed weevil in the family Curculionidae, first described by Bonsdorff in 1785. It is one of approximately 13 recognized species in the genus Tropiphorus. The species has been documented in North America, with records from Newfoundland and Labrador, Nova Scotia, and Kaliningrad. Despite its long taxonomic history, detailed biological information remains limited.
Trypophloeus nitidus
Trypophloeus nitidus is a species of bark beetle in the weevil family Curculionidae, described by J.M. Swaine in 1912. The genus Trypophloeus comprises bark beetles that tunnel beneath bark of woody plants. As a member of this genus, T. nitidus is associated with coniferous hosts. The species was synonymized under Phymatodes mojavensis by some authors, but Phymatodes mojavensis was subsequently synonymized under Phymatodes nitidus in a 2010 nomenclatural revision by Swift and Ray, which affects the broader taxonomic context of this species. The species is provisionally accepted in current taxonomic databases.
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 semisquamosus
Tychius semisquamosus is a species of leguminous seed weevil in the family Curculionidae, described by Faust in 1893. It belongs to the semisquamosus group of North American Tychius species, which are associated with host plants in the genus Astragalus and Lotus. The species has been subject to taxonomic revision, with several previously described species (T. lamellosus, T. squamosus, T. intermixtus) now synonymized under this name. It represents part of a North American fauna derived from multiple independent dispersals from Eurasia.
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 tectus
leguminous seed weevil
Tychius tectus is a species of leguminous seed weevil in the family Curculionidae, first described by LeConte in 1876 from North America. The species has been recorded from both North America and China, representing a transcontinental distribution pattern within the Holarctic region. As a member of the genus Tychius, it belongs to a group of weevils specialized on leguminous plants (Fabaceae). No specific biological or ecological studies have been published for this species.
Tyloderma
hidden snout weevils
Tyloderma is a genus of hidden snout weevils in the family Curculionidae. The genus contains at least 77 described species distributed across North, Central, and South America. One species, Tyloderma fragariae, is a documented agricultural pest of strawberry plants in North America. Members of this genus are characterized by their concealed rostrum, a trait that distinguishes them from many other weevil groups.
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 angustulum
hidden snout weevil
Tyloderma angustulum is a species of hidden snout weevil in the family Curculionidae. It belongs to the subfamily Cryptorhynchinae, a group known for their habit of tucking their rostrum into a ventral groove, concealing the mouthparts. The species has been documented in the United States.
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 pseudofoveolatum
hidden snout weevil
Tyloderma pseudofoveolatum is a species of hidden snout weevil described by Wibmer in 1981. It belongs to the family Curculionidae, one of the largest families of beetles. The species is found in North America. Very few observations of this species have been documented.
Tyloderma punctatum
hidden snout weevil
Tyloderma punctatum is a species of hidden snout weevil in the beetle family Curculionidae. It was described by Casey in 1884 and is known from North America. Like other members of its genus, it likely occupies concealed microhabitats associated with plant material.
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.
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.
Xyleborinus artestriatus
Xyleborinus artestriatus is a species of ambrosia beetle in the subfamily Scolytinae. Like other members of its genus, it is a fungus-farming beetle that excavates galleries in wood and cultivates symbiotic fungi for larval nutrition. The species has been recorded in North America, Australia, Oceania, and Southern Asia. Its specific ecological role and host associations remain poorly documented compared to better-studied congeners such as Xyleborinus saxesenii.
Xyleborinus gracilis
Xyleborinus gracilis is a species of ambrosia beetle in the family Curculionidae, subfamily Scolytinae. It was described by Wood & Bright in 1992. As a member of the ambrosia beetle tribe Xyleborini, it engages in fungus-farming behavior, excavating galleries in wood and cultivating symbiotic fungi as a food source for its larvae. The species has been documented across multiple continents including North America, South America, Africa, the Caribbean, and Middle America.
Xyleborinus saxesenii
fruit-tree pinhole borer, Keyhole Ambrosia Beetle
Xyleborinus saxesenii is a small ambrosia beetle native to the Palaearctic region that has become one of the most widespread invasive ambrosia beetles globally. It exhibits facultative eusociality with cooperative breeding, where adult daughters delay dispersal to assist with brood care, fungus farming, and nest maintenance. The species cultivates Raffaelea sulphurea as its primary fungal mutualist, though it has been observed to feed on wood tissue as well, making it xylomycetophagous. It primarily colonizes dead or dying wood but has been documented attacking live trees, including economically important species such as chestnut and apple, causing concern in forestry and orchard management.
Xyleborus affinis
sugarcane shot-hole borer
Xyleborus affinis is a highly widespread ambrosia beetle native to the American tropics, now found in tropical and subtropical regions worldwide. It cultivates symbiotic fungi in galleries bored into decaying wood, feeding exclusively on these fungal gardens. The species exhibits facultative eusociality with delayed dispersal of adult offspring, who assist with nest maintenance and brood care. Females are the dispersing sex and are strongly attracted to ethanol and specific host plant volatiles. Despite frequent association with declining trees, it primarily colonizes wood already in early decay rather than causing primary mortality.
Xyleborus celsus
Hickory Timber Beetle
Xyleborus celsus, commonly known as the hickory timber beetle, is a bivoltine ambrosia beetle native to North America. It specializes in colonizing stressed or dying black hickory trees (Carya texana) and other hickory species. The species overwinters as adults and completes development from egg to adult in approximately 35 days. Unlike some invasive congenerics, it appears to be a native primary colonizer of weakened trees rather than an aggressive killer of healthy hosts.
Xyleborus impressus
Xyleborus impressus is a species of ambrosia beetle in the family Curculionidae, first described by Eichhoff in 1868. As a member of the genus Xyleborus, it exhibits the characteristic fungus-farming behavior of ambrosia beetles, cultivating symbiotic fungi within wood galleries. The species has been documented in both North and South America. Like other ambrosia beetles, it is a wood-boring insect that lives most of its life concealed within host trees.
Xyleborus pubescens
Xyleborus pubescens is a species of bark beetle in the weevil family Curculionidae. First described by Zimmermann in 1868, this small wood-boring beetle belongs to a genus known for fungus-farming behavior, where beetles cultivate symbiotic fungi in tunnels they excavate within wood. The species occurs in North America, with records extending from the Caribbean through Middle America to Canada, including Ontario.