Curculionidae
Guides
Cylindrocopturinus 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 adspersus
sunflower stem weevil
Cylindrocopturus adspersus, commonly known as the sunflower stem weevil, is a true weevil in the family Curculionidae. Adults are small, grayish-brown beetles with irregular whitish markings, approximately 5 mm in length. The species has a single generation per year, with larvae developing inside sunflower stems and overwintering in chambers hollowed out at the base of the plant. It is recognized as an occasional but potentially serious pest of cultivated sunflowers in North America, capable of reducing yields by up to 50% in heavily infested fields.
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 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 quercus
Cylindrocopturus quercus is a species of twig and stem weevil in the tribe Zygopini, family Curculionidae. It is native to North America and associated with oak hosts (Quercus). As a member of the Zygopini, it likely exhibits the typical life history of twig-boring weevils, with larvae developing within woody stems.
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.
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.
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.
Cyrtepistomus castaneus
Asiatic oak weevil, Asian oak weevil
Cyrtepistomus castaneus, commonly known as the Asiatic oak weevil, is an invasive broad-nosed weevil native to Asia that was first detected in North America in 1933. Adults are folivores that feed on oak (Quercus) and red maple (Acer rubrum) leaves, while larvae develop in soil feeding on root hairs. The species has established widespread populations across eastern and central North America.
Dactylotrypes longicollis
Dactylotrypes longicollis is a bark beetle in the family Curculionidae, subfamily Scolytinae. It is an exotic species native to the Canary Islands that was first documented in California and North America in 2012. The species has been recorded in Africa, Europe, and North America, with established populations in California. As a scolytine beetle, it is associated with woody plants and bark habitats.
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).
Dendroctonus adjunctus
roundheaded pine beetle
Dendroctonus adjunctus, commonly known as the roundheaded pine beetle, is a bark beetle native to North America that infests and kills pine trees. Adults are 5–6 mm long with shiny, dark brown to black exoskeletons covered in hairs. The species has a one-year life cycle, with adults colonizing weakened pine trees in autumn, constructing extensive egg galleries in the cambium and phloem. Outbreaks can be devastating, killing up to 50% of pines in pure stands. The beetle is distributed across the southwestern United States and Mexico, and is considered a serious pest of commercial and wild pine stocks.
Dendroterus striatus
Dendroterus striatus is a species of bark beetle in the family Curculionidae, first described by Wood in 1972. It is known from North America and Middle America. As a member of the bark beetle guild, it likely colonizes woody substrates, though specific ecological details remain poorly documented in the available literature.
Derelomini
Palm Flower Weevils
Derelomini is a tribe of flower weevils (Curculionidae: Curculioninae) commonly known as palm flower weevils. Members are associated with reproductive structures of plants, particularly inflorescences. The tribe includes genera with specialized brood pollination mutualisms with palms (Arecaceae) and other monocots, as well as genera associated with dicotyledonous plants. Genera include Derelomus, Elaeidobius, Hypoleschus, Notolomus, Phyllotrox, and several recently described genera including Ebenacobius, Cyclanthura, Ganglionus, and Staminodeus.
Derelomus
Derelomus is a genus of weevils (Curculionidae: Derelomini) distributed across the Afrotropical and Mediterranean regions. The genus comprises 32 recognized species, organized into four main species groups based on morphological and molecular data. Species exhibit specialized brood site pollination mutualisms with host plants, with different species groups associated with distinct plant families: Fabaceae (Vachellia), Achariaceae/Ebenaceae, Strelitziaceae/Arecaceae (Strelitzia and Phoenix reclinata), and Arecaceae palms (Chamaerops, Cocos, Phoenix). Adults are small weevils with rostrate heads typical of the family.
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.
Diamimus
Diamimus is a genus of broad-nosed weevils (family Curculionidae) established by Horn in 1876. The genus belongs to the tribe Byrsopagini within the subfamily Entiminae. At least one species, D. subsericeus, has been described. The genus has been recorded from the United States.
Diamimus subsericeus
A species of broad-nosed weevil in the tribe Byrsopagini. The genus Diamimus is a small group within the diverse weevil subfamily Entiminae. Records indicate occurrence in the western United States. No published biological studies of this species have been located.
Diaprepes
Diaprepes weevils, citrus root weevils
Diaprepes is a genus of broad-nosed weevils in the family Curculionidae, subfamily Entiminae, tribe Eustylini. It belongs to the Exophthalmus genus complex. The genus contains approximately 16 described species, with Diaprepes abbreviatus being the most economically significant as a major agricultural pest of citrus and other crops in Florida and the Caribbean. The genus is native to the Caribbean region and has expanded its range to include parts of Central America and the southeastern United States.
Dichoxenus
Dichoxenus is a genus of broad-nosed weevils in the family Curculionidae. A 2024 taxonomic revision recognized 25 species, including 17 newly described from Mexico and the southern United States. The genus was expanded through synonymy of Anametis and transfer of several species from other genera. Most species are nocturnal and associated with vegetation, though some occur in leaf litter and three species are known or suspected to be cave-dwelling.
Dichoxenus setiger
Dichoxenus setiger is a broad-nosed weevil in the family Curculionidae, subfamily Entiminae, tribe Byrsopagini. The species was described by Horn in 1876. A 2024 taxonomic revision of the genus Dichoxenus clarified that D. setiger does not include the former subspecies D. setiger arkansasensis, which was synonymized with D. granulatus. The genus comprises 25 species distributed in North America, primarily Mexico and the southern United States.
Dietzella zimmermanni
minute seed weevil
Dietzella zimmermanni is a small weevil species in the family Curculionidae. Larvae are known to feed on leaves of specific host plants in the evening primrose family, including Oenothera pilosella, with this association representing the first documented larval host record for the species. The species occurs across North America with records from Canada and the United States.
Dietzianus
Dietzianus is a genus of true weevils (family Curculionidae) comprising at least two described species: D. liliputanus and D. pygmaeus. Both species were originally described by Dietz in 1891 and later transferred to this genus by Sleeper in 1953. The genus is currently classified with doubtful status in some taxonomic databases, suggesting potential taxonomic uncertainty or need for revision. No observations of this genus have been recorded in iNaturalist.
Dietzianus pygmaeus
Dietzianus pygmaeus is a species of true weevil (family Curculionidae) described by Dietz in 1891. The species is currently classified in the genus Dietzianus, though it was originally described under the genus Xanthus. It is known from North America, but detailed information about its biology, appearance, and ecology remains sparse in the available literature.
Dirabius rotundicollis
Dirabius rotundicollis is a species of flower weevil in the beetle family Curculionidae, described by Casey in 1920. The species is found in North America and is associated with flowers, though specific details about its biology remain poorly documented. As a member of the genus Dirabius, it belongs to a group of weevils commonly known as flower weevils.
Dirotognathus
Dirotognathus is a genus of broad-nosed weevils in the beetle family Curculionidae, established by Horn in 1876. The genus contains at least two described species: D. punctatus (Hatch, 1971) and D. sordidus (Horn, 1876). As members of the subfamily Entiminae, these weevils possess the characteristic short, broad rostrum typical of broad-nosed weevils. The genus is placed in the tribe Byrsopagini. Very few observations exist in biodiversity databases, suggesting it may be rarely encountered or understudied.
Dolurgus
Dolurgus is a genus of weevils in the family Curculionidae, established by W.J. Eichhoff in 1868. As a member of the Curculionoidea superfamily, it possesses the characteristic elongated snout (rostrum) typical of weevils. The genus is taxonomically accepted but poorly documented in modern literature, with limited species-level information available.
Dolurgus pumilus
Dolurgus pumilus is a species of weevil in the family Curculionidae, first described by Eichhoff in 1868. It belongs to the genus Dolurgus, a group of bark beetles within the weevil superfamily Curculionoidea. The species has been recorded from northwestern North America, specifically British Columbia in Canada and Alaska in the United States. Very little detailed biological or ecological information is available for this species.
Dorytomus
Willow Weevils
Dorytomus is a genus of weevils established by Ernst Friedrich Germar in 1817. Species in this genus are primarily associated with willows and poplars (Salicaceae). The genus contains at least seven species, with distribution records spanning Europe, Asia, and North America. Dorytomus chinensis was recorded from Russia for the first time in 2023.
Dorytomus frostii
Frost's Aspen Weevil
Dorytomus frostii is a true weevil in the family Curculionidae, commonly known as Frost's Aspen Weevil. The species was described in 1916 and occurs in western Canada and potentially broader North American ranges. Like other members of the genus Dorytomus, it is associated with woody plants.
Dorytomus hirtus
Shaggy Weevil
Dorytomus hirtus is a weevil in the family Curculionidae, commonly known as the Shaggy Weevil. The species was described by LeConte in 1876 and is distributed across northern North America, with records from western Canada including Alberta, British Columbia, and Yukon Territory. As a member of the genus Dorytomus, it belongs to a group of weevils associated with woody plants, particularly willows and poplars. The specific epithet "hirtus" refers to the hairy or shaggy appearance characteristic of this species.
Dorytomus marginatus
Dorytomus marginatus is a species of weevil in the family Curculionidae, described by Casey in 1892. It belongs to the genus Dorytomus, a group of weevils primarily associated with willow (Salix) and poplar (Populus) host plants. The species is provisionally accepted in taxonomic databases and is recorded from North America.
Dorytomus sp-two-pnw
Dorytomus sp-two-pnw is an undescribed or provisionally named species of weevil in the tribe Dorytomini, known from the Pacific Northwest region of North America. Members of this genus are generally associated with willow (Salix) and poplar (Populus) hosts. This species has been documented in collections but lacks formal taxonomic description. Its biology and precise distribution remain incompletely known due to its provisional taxonomic status.
Dryocoetini
Dryocoetini is a tribe of small bark beetles within the weevil family Curculionidae, subfamily Scolytinae. Members are characterized by their compact body form and association with woody hosts. The tribe includes economically significant species that colonize both coniferous and broadleaf trees.
Dryotribini
Dryotribini is a tribe of weevils within the subfamily Cossoninae of the family Curculionidae. The tribe contains approximately 60 described genera distributed across multiple continents. Members of this tribe are generally small, cryptic weevils associated with dead or decaying plant material. The group has been documented in both temperate and tropical regions, with notable diversity in the Pacific islands and New Zealand.
Dryotribus
Dryotribus is a genus of weevils in the family Curculionidae, established by George Henry Horn in 1873. The genus contains four described species: D. amplioculus, D. mimeticus, D. solitarius, and D. wilderi. These beetles belong to the diverse beetle superfamily Curculionoidea, which is characterized by the distinctive elongated snout or rostrum typical of weevils. The genus is relatively poorly documented in scientific literature, with limited published information on its biology and ecology.
Dysticheus
Dysticheus is a genus of broad-nosed weevils in the family Curculionidae, established by Horn in 1876. It belongs to the subfamily Entiminae and tribe Peritelini. The genus contains at least two described species: Dysticheus insignis (Horn, 1876) and Dysticheus rotundicollis (Van Dyke, 1953). Members of this genus are part of the diverse weevil fauna of North America.
Eidophelus
Eidophelus is a genus of minute bark beetles in the family Curculionidae, subfamily Scolytinae. The genus was established by Eichhoff in 1876 and contains species formerly classified within the tribe Cryphalini. Based on recent taxonomic revision, Eidophelus has been reassigned from the former Cryphalini to one of three newly erected tribes. Species are extremely small, comparable in size to a grain of wheat.
Eisonyx crassipes
Barely Hairy Baridine
Eisonyx crassipes is a species of flower weevil in the beetle family Curculionidae, described by LeConte in 1880. It is found in North America. The species is part of the genus Eisonyx, which belongs to the diverse weevil family characterized by elongated snouts. As a flower weevil, it is likely associated with flowering plants, though specific ecological details remain poorly documented.
Elassoptes
Elassoptes is a monotypic genus of true weevils (family Curculionidae) containing a single species, Elassoptes marinus. The genus was established by George Henry Horn in 1873. As a member of the largest beetle family, it possesses the characteristic elongated rostrum (snout) typical of weevils. The genus is rarely encountered in collections and field observations, with limited biological data available.
Ellescus
Ellescus is a genus of true weevils in the family Curculionidae, tribe Ellescini. The genus contains approximately 16 described species globally. In North America, four valid species are recognized: the widespread and morphologically variable E. ephippiatus, the Holarctic E. bipunctatus, the west coast endemic E. californicus, and the temperate E. michaeli. Species identification relies on morphological examination and molecular markers, particularly ITS2, which has proven more reliable than CO1 for delineating closely related species.