Weevil
Guides
Linogeraeus tonsilis
Linogeraeus tonsilis is a species of weevil described by Kuschel in 1983. It belongs to the family Curculionidae, the largest family of beetles. The species is known from very few records, with only two observations documented on iNaturalist. As a member of this diverse family, it possesses the characteristic elongated snout (rostrum) typical of weevils.
Liometophilus
hidden snout weevils
Liometophilus is a genus of hidden snout weevils in the family Curculionidae, established by H.C. Fall in 1912. The genus contains at least two described species: L. manni and L. manui. As members of the "hidden snout weevils" group, species in this genus possess a distinctive rostrum that can be retracted into a ventral groove.
Liometophilus manni
Liometophilus manni is a species of hidden snout weevil in the beetle family Curculionidae. It was described by Fall in 1912. The species is found in North America.
Lipancylus cracens
Lipancylus cracens is a species of weevil in the family Curculionidae, described by Prena in 2012. It belongs to a genus of small weevils within the highly diverse snout beetle family. The species is known from taxonomic description but appears to have limited documented ecological or biological information available in public sources.
Lissorhoptrus lacustris
marsh weevil
Lissorhoptrus lacustris is a species of marsh weevil in the beetle family Brachyceridae, originally described by Kuschel in 1951. It is found in North America, though specific details about its biology and ecology remain poorly documented in the available literature. The genus Lissorhoptrus is notable for containing the rice water weevil (L. oryzophilus), a major agricultural pest, but L. lacustris appears to be a non-pest species associated with marsh habitats.
Lissorhoptrus simplex
Lissorhoptrus simplex is a weevil species in the family Brachyceridae, found in North America including parts of Canada. It is one of several species in the genus Lissorhoptrus, which includes the economically significant rice water weevil Lissorhoptrus oryzophilus. Unlike its congener, L. simplex has not been documented as an agricultural pest.
Listroderes difficilis
difficult weevil
Listroderes difficilis is a weevil species in the family Curculionidae, first described by Germain in 1895. It has been recorded from scattered localities including Belgium (doubtful), the Balearic Islands, and the Canary Islands. The genus Listroderes belongs to a diverse group of weevils, though specific natural history information for this particular species appears limited in available literature.
Listronotus
Listronotus is a genus of weevils in the family Curculionidae containing at least 100 described species. The genus includes several economically significant agricultural pests, notably the carrot weevil (L. oregonensis), annual bluegrass weevil (L. maculicollis), and Argentine stem weevil (L. bonariensis), as well as biological control agents such as L. setosipennis used against invasive weeds. Species in this genus exhibit diverse host associations ranging from cultivated Apiaceae crops to pasture grasses and invasive weeds.
Listronotus anthracinus
underwater weevil
Listronotus anthracinus is a species of underwater weevil in the beetle family Curculionidae. It is distinguished from congeners by its aquatic habits. The species was originally described under the genus Macrops. Very little is known about its biology compared to better-studied relatives such as L. oregonensis (carrot weevil) and L. maculicollis (annual bluegrass weevil).
Listronotus appendiculatus
underwater weevil
Listronotus appendiculatus is an underwater weevil in the family Curculionidae. It is found in North America, with distribution records from Canada including Alberta, British Columbia, Manitoba, and New Brunswick. The species inhabits aquatic environments, distinguishing it from many congeneric species that are agricultural pests of terrestrial crops.
Listronotus caudatus
Listronotus caudatus is a species of underwater weevil in the beetle family Curculionidae. It is found in North America. The species has been recorded in multiple Canadian provinces including British Columbia, New Brunswick, Ontario, and Québec. Very little is known about its specific biology or ecology compared to better-studied congeners such as the carrot weevil (L. oregonensis) and annual bluegrass weevil (L. maculicollis).
Listronotus delumbis
underwater weevil
Listronotus delumbis is a species of underwater weevil in the beetle family Curculionidae. It is one of relatively few weevil species adapted to aquatic or semi-aquatic habitats. The species was described by Gyllenhal in 1834 and has been historically classified under the genus Listroderes as a synonym. Knowledge of its biology and ecology remains limited compared to better-studied Listronotus species.
Listronotus dietzi
Listronotus dietzi is a species of underwater weevil in the beetle family Curculionidae. It was described by O'Brien in 1979. The species is known from a very limited geographic range, with records restricted to Louisiana in the United States. Very little is known about its biology or ecology.
Listronotus echinatus
Listronotus echinatus is a weevil species in the family Curculionidae, originally described as Hyperodes echinatus by Dietz in 1889. The species is currently classified as a synonym in taxonomic databases, with its accepted placement in the genus Listronotus. No specific ecological or biological information has been documented for this species in the available literature.
Listronotus filiformis
Listronotus filiformis is a small weevil species in the family Curculionidae, first described by LeConte in 1876. It belongs to a genus containing several economically significant agricultural pests, though specific information about this particular species is limited. The species has been recorded in North America based on GBIF distribution data and iNaturalist observations.
Listronotus lodingi
Listronotus lodingi is a species of underwater weevil in the beetle family Curculionidae. It was originally described as Hyperodes lodingi by Blatchley in 1920. The species is currently recognized as a synonym of Hyperodes lodingi in some taxonomic databases, though it is listed under the genus Listronotus in other sources. Very little specific information is available about its biology or ecology.
Listronotus lutulentus
Listronotus lutulentus is a species of weevil in the family Curculionidae, originally described by Boheman in 1843. The species has been historically classified under the genus Eupages as Eupages lutulentus, but is currently recognized as belonging to Listronotus. Available records for this species are extremely limited, with only three observations documented on iNaturalist. No specific ecological, behavioral, or economic information has been published for this particular species.
Listronotus maculicollis
annual bluegrass weevil
Listronotus maculicollis, the annual bluegrass weevil, is a highly destructive pest of short-mown turfgrass in eastern North America, particularly golf course putting greens, fairways, and tee boxes. Adults are small (up to 4.5 mm), dark-colored weevils with a distinct spotted or maculate pronotum. The species has expanded its range from the northeastern United States into the Midwest and Southeast since the 2000s. Larval feeding causes severe damage, with early instars acting as stem-borers and later instars feeding on the crown, resulting in irregular patches of dead turf. The weevil shows strong preference for Poa annua (annual bluegrass) over other turfgrass species, though it can develop on several cool-season grasses. Temperature, not photoperiod, drives daily activity patterns, with peak activity occurring at 14–17°C.
Listronotus marshalli
Listronotus marshalli is a species of underwater weevil in the beetle family Curculionidae, described by O'Brien in 1981. It is found in North America and belongs to a genus that includes several aquatic or semi-aquatic species. The species is provisionally accepted in taxonomic databases.
Listronotus pallidus
Listronotus pallidus is an underwater weevil in the family Curculionidae, described by O'Brien in 1981. It is distinguished from other weevils by its aquatic habitat. The species is known from North America, though specific details about its biology and ecology remain poorly documented. Like other members of the genus Listronotus, it likely inhabits submerged vegetation in freshwater environments.
Listronotus porcellus
underwater weevil
Listronotus porcellus is an aquatic weevil in the family Curculionidae, known for its underwater lifestyle. It is one of several species in the genus Listronotus, which includes both aquatic and terrestrial weevils. The species has been documented in North America, including British Columbia and Québec in Canada. Relatively little is known about its specific biology compared to better-studied congeners such as L. maculicollis and L. oregonensis.
Listronotus squamiger
Listronotus squamiger is a species of underwater weevil in the family Curculionidae. It has been documented in aquatic habitats across North America, including the Canadian provinces of Alberta, British Columbia, Manitoba, and New Brunswick. The species belongs to a genus that includes several economically significant agricultural pests, though specific information about the biology and ecology of L. squamiger itself remains limited.
Listronotus teretirostris
underwater weevil
Listronotus teretirostris is a species of underwater weevil in the family Curculionidae, first described by J.L. LeConte in 1876. It is found in North America. The species belongs to a genus that includes several economically significant agricultural pests, though specific information about this particular species is limited.
Listronotus turbatus
Listronotus turbatus is a species of underwater weevil in the family Curculionidae. It was described by O'Brien in 1981. The species is found in North America. Unlike several congeners, it is not known to be an agricultural pest.
Lixus amplexus
Lixus amplexus is a species of true weevil (Curculionidae) described by Casey in 1891. The specific epithet 'amplexus' refers to the mating embrace of frogs and toads, though this appears to be coincidental naming rather than indicating any biological connection. As a member of the large genus Lixus, it belongs to a group of weevils commonly known as 'lixus weevils' that are typically associated with herbaceous plants. Very little species-specific information is documented for this taxon.
Lixus caudifer
Lixus caudifer is a weevil species in the family Curculionidae, described by John Lawrence LeConte in 1876. It belongs to the large genus Lixus, which contains numerous species distributed across North America and other regions. The species epithet 'caudifer' refers to a tail-bearing characteristic, likely describing some aspect of the weevil's morphology. Based on distribution records, this species occurs in western and central Canada including British Columbia, Manitoba, and Saskatchewan.
Lixus concavus
rhubarb curculio
Lixus concavus, commonly known as the rhubarb curculio, is a weevil species in the family Curculionidae. Adults are approximately 12 mm long, black with yellowish dusting, and possess a distinctive elongated snout with geniculate antennae. The species is univoltine, with one generation per year. While rhubarb is a common host, eggs laid in rhubarb tissue fail to develop; successful reproduction occurs in curly dock, sunflower, and thistle stalks.
Lixus macer
Lixus macer is a species of true weevil in the beetle family Curculionidae. It was described by Petri in 1904. The species is found in North America, specifically in the eastern United States.
Lixus maritimus
Lixus maritimus is a species of true weevil in the family Curculionidae, described by Fall in 1913. The specific epithet 'maritimus' suggests association with coastal or maritime habitats. As a member of the large genus Lixus, it likely shares the general body plan of elongated snout weevils with clubbed antennae. The species is recorded from North America, though detailed biological information appears limited in available sources.
Lixus mucidus
Lixus mucidus is a species of true weevil in the family Curculionidae, described by LeConte in 1876. It belongs to the large genus Lixus, which comprises elongate weevils often associated with herbaceous plants. The species is documented from North America, with confirmed records in the Canadian provinces of Ontario and Québec. Available information about its biology and ecology remains limited.
Lixus musculus
Lixus musculus is a species of true weevil (family Curculionidae) described by Thomas Say in 1832. It belongs to the large genus Lixus, which contains numerous weevil species associated with various host plants. The species is recorded from North America, though specific details about its biology and ecology remain limited in available sources.
Lixus nitidulus
Lixus nitidulus is a species of true weevil in the family Curculionidae, described by Casey in 1891. It is a member of the large genus Lixus, which contains numerous stem-boring weevil species associated with various herbaceous plants. The species is recorded from North America, though specific details about its biology and ecology remain poorly documented in the available literature.
Lixus placidus
Lixus placidus is a species of true weevil (family Curculionidae) native to North America. It was described by LeConte in 1876. The genus Lixus is a large and widespread group of weevils, commonly known as lollipop clover weevils or cabbage stem weevils, though specific common names for L. placidus are not established. Like other members of its genus, it possesses the characteristic elongated snout (rostrum) typical of weevils.
Lixus punctinasus
Lixus punctinasus is a species of true weevil in the family Curculionidae, described by John Lawrence LeConte in 1876. It belongs to the large genus Lixus, which contains numerous weevil species associated with herbaceous plants. The species is known from North America, though specific details about its biology remain poorly documented.
Lixus scrobicollis
Ragweed Weevil
Lixus scrobicollis, commonly known as the ragweed weevil, is a species of true weevil in the family Curculionidae. The species is found in North America and is associated with ragweed plants. It was described by Boheman in 1835.
Lixus terminalis
Lixus terminalis is a species of true weevil in the family Curculionidae, first described by LeConte in 1876. This species belongs to the large genus Lixus, which comprises stem-boring weevils distributed across multiple continents. The species is recorded from northern regions of North America including Canada and Alaska.
Lupinocolus
Lupinocolus is a genus of broad-nosed weevils (subfamily Entiminae) in the family Curculionidae. The genus was established by Van Dyke in 1936 and contains at least one described species, L. blaisdelli. Like other entimine weevils, members of this genus possess a short, broad rostrum and geniculate (elbowed) antennae. The genus name suggests an association with lupine plants (genus Lupinus), though this host relationship requires confirmation.
Macrancylus linearis
Macrancylus linearis is a terrestrial weevil in the family Curculionidae. The species is believed to have originated in the Pacific region and has been introduced to mainland United States. It has been documented in shoreline habitats, specifically in association with driftwood.
Macrobaris aquilonia
Macrobaris aquilonia is a species of weevil described by Prena in 2013. It belongs to the genus Macrobaris within the family Curculionidae, the largest family of beetles. The species is known from limited published records and its biology remains poorly documented.
Macrorhoptus estriatus
Macrorhoptus estriatus is a species of weevil in the family Curculionidae, first described by John Lawrence LeConte in 1876. It is known from the central United States. As a member of the genus Macrorhoptus, it belongs to a group of small weevils whose biology remains poorly documented.
Macrorhyncolus littoralis
Driftwood Weevil
Macrorhyncolus littoralis, commonly known as the driftwood weevil, is a species of true weevil in the family Curculionidae. The species is currently considered a synonym of Eutornus littoralis according to GBIF records. It has been documented in the conterminous 48 United States. The common name suggests an association with driftwood habitats, though specific ecological details remain poorly documented.
Macroscytalus
Macroscytalus is a genus of weevils (family Curculionidae) established by Thomas Broun in 1881. It is native to New Zealand and is part of the diverse Australasian weevil fauna. The genus contains relatively few described species and remains poorly documented in published literature.
Madarellus cuneatus
flower weevil
Madarellus cuneatus is a species of flower weevil in the family Curculionidae, described by Casey in 1893. It is found in North America and is associated with Vitis vines (grape), where it inhabits the stems. As a member of the weevil family, it possesses the characteristic elongated snout (rostrum) typical of Curculionidae.
Madarellus inconstans
flower weevil
Madarellus inconstans is a species of flower weevil in the family Curculionidae, described by Thomas Casey in 1920. As a member of the Curculionidae, it possesses the characteristic elongated snout (rostrum) typical of weevils. The species is known from North America, though detailed biological information remains limited in published sources.
Madarellus undulatus
Wavy Flower Weevil
Madarellus undulatus is a small weevil species in the family Curculionidae, subfamily Baridinae. It measures 2.8–4.5 mm in length and exhibits distinctive coloration with a brown head and black or sometimes reddish body. The species is widely distributed across North America, occurring throughout the United States and in the Canadian provinces of Ontario and Quebec. Larvae have been documented feeding on poison ivy (Toxicodendron radicans) and Virginia creeper (Parthenocissus quinquefolia).
Maemactes
Maemactes is a genus of weevils in the family Curculionidae, established by Carl Johan Schoenherr in 1837. The genus is poorly documented in modern literature, with minimal published research on its species composition, biology, or ecology. Records indicate it belongs to the hyperdiverse weevil family, one of the largest families of organisms on Earth. The genus appears to be rarely collected, with very few observations in biodiversity databases.
Magdalinops
Magdalinops is a genus of weevils in the family Curculionidae, established by W.G. Dietz in 1891. It belongs to the superfamily Curculionoidea, the largest group of weevils. The genus is poorly documented in scientific literature, with minimal published information on its biology and ecology. Records in biodiversity databases indicate very few observations, suggesting it is either rare, cryptic, or understudied. Its taxonomic placement within Curculionidae has been accepted in major catalogues, though finer relationships remain unresolved.
Magdalis austera substriga
Magdalis austera substriga is a subspecies of weevil in the family Curculionidae, described by Fall in 1913. It belongs to the genus Magdalis, a group of bark and wood-boring weevils associated with coniferous and deciduous trees. The subspecies is recognized from Vermont in the northeastern United States, though detailed biological studies remain limited.
Magdalis cuneiformis
wedge-shaped bark weevil
Magdalis cuneiformis is a species of bark weevil in the family Curculionidae. The species was described by George Henry Horn in 1873. It is known from North America, with records from British Columbia, Canada. The specific epithet "cuneiformis" refers to its wedge-shaped appearance.
Magdalis gracilis
Magdalis gracilis is a species of weevil in the family Curculionidae, described by John Lawrence LeConte in 1857. The genus Magdalis comprises small to medium-sized weevils commonly associated with woody plants, particularly conifers and hardwoods. This species is recorded from western North America, including British Columbia. Specific ecological details for M. gracilis remain poorly documented in published literature.