Curculionidae
Guides
Sphenophorus aequalis ochreus
clay-colored billbug
Sphenophorus aequalis ochreus is a subspecies of the clay-colored billbug, a weevil in the family Curculionidae. Billbugs are significant turfgrass and agricultural pests whose larvae bore into plant stems, roots, and crowns. This subspecies has been documented in association with saltmarsh bulrush stands near alkaline lake margins in New Mexico, where adults were observed walking, mating, and burrowing into soil at the base of plants. The species complex presents identification challenges due to morphological similarities among related billbug taxa.
Sphenophorus aequalis pictus
Sphenophorus aequalis pictus is a subspecies of weevil in the family Curculionidae. It belongs to the genus Sphenophorus, commonly known as billbugs, which are recognized for their elongated snouts and association with grasses and sedges. The nominate species S. aequalis is part of a complex of billbug species that can be difficult to distinguish morphologically.
Sphenophorus australis abrasus
Sphenophorus australis abrasus is a subspecies of weevil in the family Curculionidae. Members of the genus Sphenophorus, commonly known as billbugs, are recognized as significant agricultural pests. The specific subspecies designation suggests geographic or morphological differentiation from the nominate form, though detailed published accounts of this particular subspecies appear limited.
Sphenophorus maidis
Maize Billbug
Sphenophorus maidis, commonly known as the maize billbug, is a weevil species in the family Curculionidae. It is found in North America and is associated with maize (corn) as a host plant. The species belongs to a genus of billbugs that are significant agricultural pests, with larvae that bore into plant stems and roots causing substantial damage to crops.
Sphenophorus probably-unnamed
Sphenophorus probably-unnamed is a billbug species within the weevil genus Sphenophorus, a group of turfgrass and agricultural pests whose larvae are notoriously difficult to identify morphologically. The specific epithet "probably-unnamed" indicates this taxon represents a distinct species that has not yet been formally described or named in the scientific literature. Like other Sphenophorus species, it is presumed to have a life cycle involving larval development within plant tissues and adult feeding on vegetation, though specific biological details for this undescribed taxon remain undocumented.
Sphenophorus venatus glyceriae
Sphenophorus venatus glyceriae is a subspecies of billbug weevil in the family Curculionidae. Billbugs (Sphenophorus spp.) are significant turfgrass and agricultural pests whose larvae feed internally on plant stems and roots. This subspecies belongs to a complex of closely related taxa that are difficult to distinguish morphologically, particularly as larvae.
Stamoderes uniformis
Stamoderes uniformis is a species of broad-nosed weevil in the family Curculionidae, first described by Casey in 1888. The species is known from western North America, with confirmed records from California. As a member of the subfamily Entiminae, it possesses the characteristic short, broad rostrum typical of broad-nosed weevils.
Stenancylus
Stenancylus is a genus of true weevils (Curculionidae) established by Casey in 1892. The genus contains nine described species, most described by Wibmer & O'Brien in 1986. Species are distributed across the Americas, with records from Panama, Colombia, and the United States. The genus name derives from Greek roots suggesting narrow or slender form.
Stenobaris
Stenobaris is a genus of flower weevils in the family Curculionidae, established by Martin L. Linell in 1897. The genus is monotypic, containing only one described species: Stenobaris avicenniae. As a member of Curculionidae, it possesses the characteristic elongated snout (rostrum) typical of weevils. The genus is poorly documented in scientific literature, with limited biological or ecological information available.
Stenoptochus
Stenoptochus is a genus of broad-nosed weevils in the family Curculionidae, established by Casey in 1888. The genus contains at least two described species: S. inconstans and S. vanduzeei. These weevils belong to the subfamily Entiminae and tribe Peritelini. As with other broad-nosed weevils, they possess a short, broad rostrum rather than the elongated snout characteristic of many curculionids.
Stenoscelis
Stenoscelis is a genus of weevils (family Curculionidae) comprising at least 30 described species. The genus was established by Thomas Vernon Wollaston in 1861. These beetles are classified among snout and bark beetles, placing them within the diverse weevil fauna. Species in this genus occur across multiple continents with documented records from North America and Europe.
Stenoscelis brevis
snout beetle, bark beetle
Stenoscelis brevis is a species of weevil in the family Curculionidae, first described by Boheman in 1845. The species belongs to a genus of snout or bark beetles distributed in North America. Records indicate presence across eastern Canada including New Brunswick, Nova Scotia, Ontario, and Québec.
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.
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
true weevils
Sternechus is a genus of true weevils (family Curculionidae) containing more than 50 described species. The genus is best known for Sternechus subsignatus, a significant agricultural pest of soybean in South America known locally as 'picudo grande' (big weevil). This species was first detected in southern Brazil in the 1970s and has since spread to northern Brazil and Argentina, where it causes economic damage through stem boring that can result in stand loss. Some species in the genus have been treated as distinct species in certain regions; for example, S. subsignatus in northern Argentina is sometimes considered S. pinguis. The genus is part of the extraordinarily diverse Curculionidae, which with approximately 60,000 species represents one of the largest families in the animal kingdom.
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 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
flower weevils
Stictobaris is a genus of flower weevils in the family Curculionidae, established by Casey in 1892. The genus contains approximately eight described species distributed in North America. Members are associated with flowering plants, though specific host relationships remain poorly documented for most species.
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.
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 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.
Tanymecini
broad-nosed weevils
Tanymecini is a tribe of broad-nosed weevils within the subfamily Entiminae (Curculionidae). The tribe contains numerous genera distributed across subtribes including Piazomiina, Tainophthalmina, and Tanymecina, with additional genera currently classified as incertae sedis. Members exhibit considerable morphological and ecological diversity, with documented associations with host plants in Chenopodiaceae and other families. Some species are recognized agricultural pests, while others have been investigated for biological control applications.
Tanymecus confusus
little pasture spur-throated grasshopper
Tanymecus confusus is a species of broad-nosed weevil in the family Curculionidae, described by Thomas Say in 1831. The species is found in North America, with records from Canada and the United States. As a member of the Entiminae subfamily, it possesses the characteristic broad rostrum typical of this group. Available information on this species is limited.
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.
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.
Thysanoes fimbricornis
Thysanoes fimbricornis is a species of bark beetle in the family Curculionidae, described by LeConte in 1876. It is found in North America and Middle America. The genus Thysanoes comprises small bark beetles associated with woody plants. Like other members of Curculionidae, it has a characteristic rostrum and elbowed antennae.
Thysanoes texanus
Thysanoes texanus is a species of bark beetle in the family Curculionidae, described by Blackman in 1943. It belongs to a genus of typical bark beetles, though specific details about its biology and ecology remain poorly documented. The species is known to occur in North America.
Tomicus
pine shoot beetles
Tomicus is a genus of bark beetles in the family Curculionidae, described by Pierre André Latreille in 1802. The genus contains at least seven recognized species, including economically significant forest pests such as T. piniperda, T. minor, T. destruens, and T. yunnanensis. These beetles are commonly known as pine shoot beetles due to their distinctive life history involving feeding on pine shoots before trunk colonization. Several species have caused substantial mortality in pine forests across Europe, the Mediterranean region, and southwestern China, with T. yunnanensis described as unusually aggressive in its native range.
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.
Tranes
Tranes is a genus of true weevils in the family Curculionidae, subfamily Molytinae, established by Schoenherr in 1843. Species in this genus are strongly associated with cycads, particularly the genera Bowenia, Lepidozamia, and Macrozamia. A 2024 integrative taxonomic revision expanded the genus from four to ten species, describing six new species and redescribing previously named taxa. The genus is part of the broader Tranes group of cycad- and grasstree-associated weevils found in Australia.
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 abietis
Treptoplatypus abietis is a species of weevil in the family Curculionidae, described by Bright & Skidmore in 2002. The genus Treptoplatypus contains ambrosia beetles that bore into wood. The specific epithet "abietis" suggests an association with fir trees (genus Abies). The species is provisionally accepted in taxonomic databases with limited published information available.
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.