Weevil
Guides
Stephanocleonus confusus
Stephanocleonus confusus is a cylindrical weevil in the family Curculionidae, described by Anderson in 1987. It belongs to a genus of weevils characterized by their elongated, cylindrical body form. The species is documented from North America, with records from Canadian provinces including Alberta and Saskatchewan. Very little is known about its specific biology or ecology.
Stephanocleonus immaculatus
cylindrical weevil
Stephanocleonus immaculatus is a species of cylindrical weevil in the beetle family Curculionidae. It was described by Anderson in 1987. The species is found in North America, with records from western Canadian provinces including Alberta, British Columbia, and Manitoba.
Stephanocleonus parshus
Stephanocleonus parshus is a species of weevil in the family Curculionidae, described by Anderson in 1987. The genus Stephanocleonus comprises weevils characterized by a distinctive stepped or notched pronotum. This species is known from western and central Canada.
Steremnius
Steremnius is a genus of true weevils (Curculionidae) established by Schoenherr in 1835, containing at least four described species. The genus includes the conifer seedling weevil Steremnius carinatus, a documented reforestation pest in coastal British Columbia. Other described species include S. scrobiculatus, S. shermani, and S. tuberosus. Information on genus-level biology is limited; most ecological and behavioral data derive from studies of S. carinatus.
Steremnius carinatus
conifer seedling weevil
Steremnius carinatus, commonly known as the conifer seedling weevil, is a pest of coniferous seedlings in coastal British Columbia. Adults emerge from stumps and slash approximately two years after logging and girdle young seedlings near the root collar. The species was formerly considered a scavenger but is now recognized as a significant reforestation pest. Adults are unusually long-lived, surviving three or more winters and producing broods annually.
Stereogaster globosa
Stereogaster globosa is a species of broad-nosed weevil in the family Curculionidae, described by Van Dyke in 1936. The species belongs to the tribe Geonemini within the subfamily Entiminae, a group commonly known as root weevils or broad-nosed weevils. The specific epithet 'globosa' refers to its rounded, globular body shape. The genus Stereogaster is part of the diverse weevil fauna of western North America.
Sternechus paludatus
Bean Stalk Weevil
Sternechus paludatus, commonly known as the bean stalk weevil, is a species of true weevil in the family Curculionidae. It is found in North America. The species is provisionally accepted in taxonomic databases. Very little detailed biological information is available for this species in the provided sources.
Sternochetus
Sternochetus is a genus of weevils in the family Curculionidae, subfamily Cryptorhynchinae. The genus contains at least three described species, including Sternochetus mangiferae (mango seed weevil), Sternochetus frigidus (mango pulp weevil), and Sternochetus olivieri. These species are economically significant pests of mango (Mangifera indica) and related species. Adults are compact weevils with a characteristic habit of pressing their legs to their body and fitting their beak into a ventral groove when disturbed. The genus was established by Pierce in 1917, with some species previously described under Curculio.
Stethobaris
flower weevil
Stethobaris is a genus of flower weevils in the family Curculionidae, subfamily Baridinae. The genus contains approximately 18-25 described species, with at least 16 species documented in North America. Members of this genus are associated with plants in the family Amaryllidaceae. The genus was established by J.L. LeConte in 1876.
Stethobaris ovata
flower weevil
Stethobaris ovata is a species of flower weevil in the beetle family Curculionidae. It is native to North America, with records from Canada including Manitoba, New Brunswick, Nova Scotia, and Ontario. As a member of Curculionidae, it possesses the characteristic elongated snout typical of weevils. Specific ecological details about this species remain poorly documented in published literature.
Sthereus quadrituberculatus
Sthereus quadrituberculatus is a true weevil in the family Curculionidae, first described by Motschulsky in 1845. The species occurs in northern North America, with confirmed records from Alaska, British Columbia, and Saskatchewan. It belongs to a genus of weevils whose members are generally associated with coniferous forests. The specific epithet 'quadrituberculatus' refers to four tubercles, likely describing a diagnostic morphological feature of the species.
Stictobaris ornatella
flower weevil
Stictobaris ornatella is a species of flower weevil in the beetle family Curculionidae, described by Casey in 1920. The species is known from North America and has been documented in only a small number of observations. Its larvae are specialized stem borers in Amaranth plants.
Stomodes
broad-nosed weevils
Stomodes is a genus of broad-nosed weevils in the family Curculionidae, established by Schönherr in 1826. The genus comprises approximately 11 described species distributed primarily in Europe and North Africa. Species within this genus are classified in the subfamily Entiminae and tribe Otiorhynchini. As with other entimine weevils, members likely possess a short, broad rostrum and elbowed antennae.
Strophosoma
Strophosoma is a genus of weevils (Curculionidae: Entiminae) established by Billberg in 1820. The genus includes both bisexual and parthenogenetic species, with documented variation in reproductive mode between species such as S. capitatum (bisexual) and S. melanogrammum (parthenogenetic). These weevils are known to occur in forest habitats, where some species have been reported as pests in young forest stands. The genus has been subject to taxonomic revision, with subgenera Leucostrophus and Morphostrophus distinguished by morphological characters.
Styphlini
Styphlini is a tribe of weevils within the family Curculionidae, subfamily Curculioninae. The tribe includes genera such as Styphlus and Orthochaetes. Species within this tribe show Palearctic affinities, with some taxa documented from the eastern Mediterranean, southern France, Mallorca, and more recently from North America as introduced or expanding populations.
Sudus floridanus
Sudus floridanus is a species of weevil in the family Curculionidae, described by Kissinger in 1964. The specific epithet "floridanus" indicates a Florida association. As a member of Curculionidae, it possesses the characteristic elongated snout (rostrum) typical of weevils. Very little published information exists regarding its biology, ecology, or specific habits. The genus Sudus is not well-documented in entomological literature.
Tachyerges
Tachyerges is a genus of weevils in the family Curculionidae, established by Schoenherr in 1825. The genus comprises at least two recognized species: Tachyerges salicis and Tachyerges stigma. Species in this genus are associated with willow (Salix) host plants. The genus has documented populations across Europe and North America.
Tachyerges ephippiatus
Tachyerges ephippiatus is a species of weevil in the family Curculionidae. It is distributed across central and eastern Canada, with records from Alberta, British Columbia, Manitoba, New Brunswick, and Nova Scotia. The genus Tachyerges includes species associated with conifers, though specific ecological details for this species remain limited in published literature.
Tachyerges niger
Tachyerges niger is a small weevil species in the family Curculionidae. It is currently recognized as a valid species within the genus Tachyerges, though some taxonomic databases list it as a synonym of Rhynchaenus niger. The species has been documented in the northeastern United States, with records from Vermont. Like other members of its genus, it is likely associated with woody plants, though specific host relationships remain poorly documented.
Tachyerges salicis
Tachyerges salicis is a European weevil in the family Curculionidae. The species is associated with willow (Salix) hosts, as indicated by its specific epithet. It is a moderately well-documented species with over 350 observations on iNaturalist.
Tachygonus centralis
flea weevil
Tachygonus centralis is a species of flea weevil described by John Lawrence LeConte in 1868. It belongs to the family Curculionidae, the largest family of beetles, commonly known as weevils or snout beetles. The species is known to occur in North America. As a member of the genus Tachygonus, it shares the characteristic flea-like jumping ability that gives these weevils their common name.
Tachygonus fulvipes
Tachygonus fulvipes is a species of weevil in the family Curculionidae, first described by John Lawrence LeConte in 1876. The genus Tachygonus is characterized by distinctive modifications to the hind femora, which feature repetitive structural variations. This species is part of a genus known for morphological diversity in leg armature, a trait noted in comparative studies of beetle morphology. The species is provisionally accepted in taxonomic databases and has been recorded from North America.
Tachygonus lecontei
flea weevil
Tachygonus lecontei is a species of flea weevil in the beetle family Curculionidae. It is found in North America. The species was described by Gyllenhal in 1833. As a member of the flea weevil group, it belongs to a lineage characterized by their small size and jumping ability.
Tachygonus tardipes
Texas Bow-legged Weevil
Tachygonus tardipes is a species of weevil in the family Curculionidae, first described by J.L. LeConte in 1876. It belongs to a genus noted for distinctive modifications to the hind femora. The species has been recorded in North America, including Ontario, Canada.
Tanymecus texanus
Tanymecus texanus is a broad-nosed weevil in the family Curculionidae, first described by Van Dyke in 1935. The species is known from the southwestern United States, specifically Texas and New Mexico. As a member of the genus Tanymecus, it belongs to a group of weevils characterized by their elongated snouts and association with herbaceous plants.
Tanysphyrus ater
Tanysphyrus ater is a small weevil species described by Blatchley in 1928. It belongs to the family Erirhinidae (sometimes placed in Brachyceridae or Curculionidae in different classifications), a group of primitive weevils. The species epithet 'ater' refers to its black coloration. Very little published information exists on its biology or ecology, with only scattered collection records from North America.
Temnocerus aeratus
Temnocerus aeratus is a species of leaf-rolling weevil in the family Attelabidae, originally described by Thomas Say in 1831 as Curculio aeratus. The species belongs to a genus characterized by distinctive elongated rostrums used in leaf manipulation for oviposition. Like other attelabids, it is associated with woody plants, though specific host records for this species remain limited. It is known from North America based on collection records.
Temnocerus macrophthalmus
Temnocerus macrophthalmus is a species of leaf-rolling weevil described by Legalov in 2003. It belongs to the family Attelabidae, a group of beetles known for their distinctive leaf-rolling behavior used in nest construction. The species name refers to its notably large eyes. Very few observations of this species have been documented, with only 2 records in iNaturalist as of the knowledge cutoff.
Tetrabothynus
Tetrabothynus is a genus of broad-nosed weevils in the family Curculionidae, subfamily Entiminae. The genus was established by Labram and Imhoff in 1852. It belongs to the tribe Eustylini, a group of weevils characterized by their broad snouts and often colorful or patterned bodies. Very few observations of this genus exist in public databases, suggesting it is either rare, poorly sampled, or restricted to specific habitats.
Thecesternus
bison dung weevils, bison snout beetles
Thecesternus is a genus of flightless, nocturnal broad-nosed weevils comprising approximately seven described species. These small beetles, measuring about six millimeters in length, are known for their truncated rostrum and habit of sheltering under bison dung in grassland habitats. The genus has been studied primarily through *T. hirsutus*, which was evaluated as a potential biological control agent for the invasive weed *Parthenium hysterophorus*.
Thecesternus hirsutus
bison dung weevil, bison snout beetle
Thecesternus hirsutus is a small, flightless weevil in the family Curculionidae, native to North America. It was first described by Pierce in 1909 and gained scientific attention through evaluation as a potential biological control agent for Parthenium hysterophorus in Australia. The species is nocturnal, spends winter as larvae underground feeding on plant roots, and is known for its cryptic appearance and death-feigning behavior when disturbed.
Thecesternus humeralis
Thecesternus humeralis is a species of broad-nosed weevil in the family Curculionidae, described by Say in 1826. It is one of seven species in the genus Thecesternus, commonly known as "bison dung weevils" or "bison snout beetles" due to their historical association with seeking shelter under bison dung. The species is found in North America and shares the genus-wide traits of being small, flightless, nocturnal, and cryptic.
Thecesternus maculosus
bison dung weevil, bison snout beetle
Thecesternus maculosus is a species of broad-nosed weevil in the beetle family Curculionidae. It is one of seven species in the genus Thecesternus, collectively known as "bison dung weevils" or "bison snout beetles" for their historical association with bison dung as daytime shelter. The species is found in North America, particularly in the central and eastern United States and adjacent Canada. Like other members of its genus, it is nocturnal, flightless, and cryptic in appearance.
Thinoxenus
Thinoxenus is a genus of broad-nosed weevils (family Curculionidae) established by Horn in 1876. It belongs to the subfamily Entiminae and tribe Peritelini. At least one species, T. squalens, has been described. Information on its biology and ecology remains limited.
Tournotaris
Tournotaris is a genus of weevils established in 1999, currently placed in the family Brachyceridae (sometimes treated as Erirhinidae or within Curculionidae in older classifications). The genus contains species native to Europe, with records from Denmark, Norway, and Sweden. At least one species, Tournotaris bimaculatus, has been described.
Tournotaris bimaculata
Tournotaris bimaculata is a species of weevil in the family Brachyceridae, originally described by Fabricius in 1787 under the name Curculio bimaculatus. The species has a Holarctic distribution, with records indicating presence in parts of Europe. As a member of the Curculionoidea superfamily, it possesses the characteristic elongated snout typical of weevils.
Tracheloschizus
Tracheloschizus is a genus of straight-snouted weevils in the family Brentidae, established by Damoiseau in 1966. The genus belongs to the weevil superfamily Curculionoidea and is characterized by members of this primarily tropical family. Brentidae weevils are distinguished from the more familiar Curculionidae by their elongated, straight rostrums rather than the curved snouts typical of true weevils. The genus is relatively poorly documented in public sources, with limited species-level information available.
Trachyphloeosoma advena
broad-nosed weevil
Trachyphloeosoma advena is a species of broad-nosed weevil described by Zimmerman in 1956. It belongs to the tribe Trachyphloeini within the subfamily Entiminae. The species has been documented in the southeastern United States and Hawaii. As with other members of its genus, it is characterized by the broad rostrum typical of Entiminae weevils.
Trepobaris elongata
flower weevil
Trepobaris elongata is a species of flower weevil in the beetle family Curculionidae. It was described by Thomas Lincoln Casey in 1922. The species is found in North America. As a member of the genus Trepobaris, it belongs to a group of weevils associated with flowers.
Treptoplatypus wilsoni
Treptoplatypus wilsoni is a species of weevil in the family Curculionidae, described by Bright and Skidmore in 2002. The species belongs to the genus Treptoplatypus, which comprises ambrosia beetles that typically cultivate fungal symbionts in wood galleries. Based on the taxonomic placement and known biology of related species in this genus, T. wilsoni is likely associated with woody substrates, though specific ecological details remain poorly documented. The species has been recorded from British Columbia, Canada.
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.
Trichapion
Trichapion is a genus of weevils in the family Brentidae (formerly placed in Apionidae). The genus was established by Wagner in 1912. Several species have been studied as biological control agents, particularly for invasive Sesbania weeds. Species were transferred from the genus Apion during taxonomic revisions.
Trichapion commodum
Trichapion commodum is a species of straight-snouted weevil in the family Brentidae, described by Fall in 1898. It belongs to the subfamily Apioninae, a group characterized by their distinctive elongated rostra. The genus Trichapion is distinguished by having antennae with a scape that is distinctly longer than the head. This species has been recorded from the Canadian Prairie provinces.
Trichapion disparatum
Trichapion disparatum is a species of straight-snouted weevil in the family Brentidae, subfamily Apioninae. Members of this genus are small, slender weevils characterized by elongated rostrums and are commonly associated with leguminous host plants. The species is part of a taxonomically complex group of apionine weevils that have undergone significant revision in recent decades.
Trichapion leporinum
Trichapion leporinum is a species of straight-snouted weevil in the family Brentidae, described by Salsbury in 1987. The species epithet "leporinum" (hare-like) may reference a morphological trait or host association. Distribution records indicate presence in Manitoba, Canada. As a member of the Apioninae subfamily, it likely exhibits the slender body form and elongated rostrum characteristic of this group.
Trichapion modicum
Trichapion modicum is a species of straight-snouted weevil in the family Brentidae. The genus Trichapion was established to accommodate species previously placed in Apion, distinguished by morphological features of the rostrum and antennae. This species has been documented in Manitoba, Canada. Like other brentid weevils, it possesses an elongated rostrum and elbowed antennae. Specific ecological details for this species remain poorly documented.
Trichapion nigrum
Trichapion nigrum is a species of straight-snouted weevil in the family Brentidae, first described by Herbst in 1797. It belongs to a genus of small weevils characterized by elongated rostrums. The species has been documented in eastern Canada, with records from New Brunswick, Ontario, and Quebec. Like other members of Brentidae, it is likely associated with plant material, though specific ecological details remain poorly documented.
Trichapion porcatum
Trichapion porcatum is a species of straight-snouted weevil in the family Brentidae. It is recorded from eastern Canada, specifically New Brunswick, Ontario, and Quebec. The genus Trichapion comprises small weevils associated with leguminous plants. Limited observational data exists for this species.
Trichapion proclive
Trichapion proclive is a species of straight-snouted weevil in the family Brentidae, first described by John Lawrence LeConte in 1857. It belongs to a genus characterized by elongated rostra and association with leguminous host plants. Records indicate presence in British Columbia, Canada, though observations remain sparse with limited documented occurrence data.