Sphenophorus
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 arizonensis
Sphenophorus arizonensis is a billbug weevil species in the family Dryophthoridae, described by Horn in 1873. It is native to North America and belongs to a genus containing multiple economically significant turfgrass and crop pests. Like other Sphenophorus species, it likely develops within grass stems and roots, though specific biological details for this species remain poorly documented.
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 blanchardi
Sphenophorus blanchardi is a species of weevil in the family Dryophthoridae, described by Chittenden in 1905. It is native to North America and belongs to a genus containing multiple species that are significant agricultural pests, though specific information about this particular species is limited.
Sphenophorus costipennis
Sedge Billbug Weevil
Sphenophorus costipennis is a species of weevil in the family Dryophthoridae, commonly known as the Sedge Billbug Weevil. It is distributed across North America, with records from Canadian provinces including Alberta, British Columbia, and Manitoba. As a member of the genus Sphenophorus, it belongs to a group of weevils commonly referred to as billbugs, which are associated with various grass and sedge host plants. The species was described by Horn in 1873.
Sphenophorus deficiens
Sphenophorus deficiens is a species of billbug weevil described by Chittenden in 1920. Like other members of the genus Sphenophorus, it belongs to the family Dryophthoridae (formerly placed in Curculionidae). The genus Sphenophorus comprises multiple weevil species associated with grasses and sedges, with several species being economically significant agricultural pests. Information specific to S. deficiens is sparse in the available literature.
Sphenophorus gagatinus
Sphenophorus gagatinus is a species of weevil in the family Dryophthoridae, first described by Gyllenhal in 1838. It is one of numerous billbug species within the genus Sphenophorus, a group of economically significant turfgrass and crop pests. The species occurs in North America, though specific details regarding its biology, host associations, and pest status remain poorly documented compared to better-known congeners such as S. parvulus and S. callosus.
Sphenophorus gentilis
Sphenophorus gentilis is a species of weevil in the family Dryophthoridae. It is native to North America. As a member of the genus Sphenophorus, it is commonly known as a billbug. Specific ecological and biological details for this species remain poorly documented in available literature.
Sphenophorus germari
Sphenophorus germari is a weevil species in the family Dryophthoridae (formerly Curculionidae), first described by Horn in 1873. It is found in North America and belongs to a genus containing multiple agricultural pest species known as billbugs. Like other Sphenophorus species, it likely exhibits the typical billbug life cycle with larvae developing within plant stems and roots, though specific biological details for this species remain poorly documented.
Sphenophorus graminis
Sphenophorus graminis is a species of weevil (Coleoptera: Dryophthoridae) found in North America. It is one of multiple billbug species within the genus Sphenophorus, a group of weevils that develop within plant stems and roots. Like related billbug species, adults and larvae feed on grasses, though specific details of its biology and host associations are not well documented in available sources.
Sphenophorus hoegbergii
Sphenophorus hoegbergii is a species of billbug weevil in the family Dryophthoridae, originally described by Boheman in 1845. It is recorded from North America, though specific details regarding its biology, host associations, and economic significance remain poorly documented in the available literature. The species belongs to a genus containing numerous agricultural pests, but direct evidence linking this particular species to crop damage is absent.
Sphenophorus imus
Sphenophorus imus is a species of weevil in the family Dryophthoridae, first described by Gyllenhal in 1838. It belongs to a genus containing numerous species commonly known as billbugs, many of which are significant agricultural pests. The species is recorded from North America, though specific details regarding its biology, host associations, and economic importance remain poorly documented compared to congeners such as S. parvulus, S. callosus, and S. levis.
Sphenophorus incongruus
Sphenophorus incongruus is a weevil species in the family Dryophthoridae, first described by Chittenden in 1905. The species belongs to the genus Sphenophorus, commonly known as billbugs, which contains numerous turfgrass and crop pests. Records indicate presence in North America, specifically in the Canadian provinces of Ontario and Québec. Like other Sphenophorus species, it likely possesses the elongated snout typical of weevils and shares the general billbug body plan, though specific distinguishing features from congeners remain poorly documented in available literature.
Sphenophorus latinasus
Sphenophorus latinasus is a weevil species in the family Dryophthoridae, occurring in North America. The genus Sphenophorus comprises billbugs, a group of weevils whose larvae develop within plant stems and roots. Little specific information has been published regarding the biology or economic importance of this particular species compared to better-studied congeners such as S. levis (sugarcane weevil) and S. callosus (southern corn billbug).
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 necydaloides
Sphenophorus necydaloides is a species of weevil in the family Dryophthoridae, distributed in North America. Like other members of the genus Sphenophorus, it is a billbug weevil. The species was described by Fabricius in 1802. Beyond its taxonomic placement and geographic distribution, specific details about its biology, ecology, and economic importance remain poorly documented in available sources.
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 robustus
Corn Billbug
Sphenophorus robustus is a species of billbug weevil in the family Dryophthoridae. It is distributed across North America, with records from Canada (British Columbia, Manitoba, Ontario) and the United States. The species belongs to a genus containing several economically significant agricultural pests, though specific information about this species' biology remains limited. Two subspecies are recognized: S. r. robustus and S. r. rectistriatus.
Sphenophorus scoparius
Sphenophorus scoparius is a weevil species in the family Dryophthoridae, found in North America. Like other members of the genus Sphenophorus, it is commonly referred to as a billbug. Species in this genus are associated with turfgrass and agricultural habitats, though specific ecological details for S. scoparius remain poorly documented in published literature.
Sphenophorus tardus
tardy billbug
Sphenophorus tardus is a species of weevil (billbug) in the family Dryophthoridae, first described by Fall in 1901. It is found in North America. Like other members of the genus Sphenophorus, it is likely associated with turfgrass or agricultural habitats, though specific ecological details for this species remain poorly documented. The species name 'tardus' (Latin for 'slow' or 'late') may refer to aspects of its phenology or behavior.
Sphenophorus venatus
hunting billbug
Sphenophorus venatus, commonly known as the hunting billbug, is a weevil species in the family Dryophthoridae. It is native to North and Central America, with established populations in parts of Europe including Spain and Corsica. The species is a documented pest of turfgrasses and forage crops, with different subspecies showing host preferences: S. v. vestitus affects zoysiagrass, while S. v. confluens has been recorded as a pest of orchardgrass. Adults and larvae feed on grasses, with larvae causing damage by boring into stems and roots. The species uses volatile organic compounds from host plants and conspecifics for dispersal and host-finding, with males attracted to Cynodon dactylon and females attracted to male conspecifics.
billbugweevilturfgrass-pestDryophthoridaeSphenophorushunting-billbuggrass-pestpheromonevolatile-organic-compoundscuticular-hydrocarbonsintegrated-pest-managementsubspecies-vestitussubspecies-confluenszoysiagrassorchardgrassbermudagrassNorth-Americaintroduced-speciesEuropemolecular-identificationCOIITS2Sphenophorus 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.
Sphenophorus vomerinus
Narrow-nosed Billbug Weevil
Sphenophorus vomerinus is a species of weevil in the family Dryophthoridae, distributed across North America. It belongs to the genus Sphenophorus, commonly known as billbugs, which are recognized as significant pests of turfgrass and agricultural crops. The species was described by LeConte in 1858.
Sphenophorus zeae
Timothy billbug
Sphenophorus zeae, commonly known as the Timothy billbug, is a true weevil species in the family Dryophthoridae. It is native to North America, with documented occurrences in Canada (New Brunswick, Nova Scotia, Ontario) and the United States. As a member of the genus Sphenophorus, it shares the characteristic billbug morphology and life history involving larval development within plant stems and roots. The species is associated with grasses, including timothy (Phleum pratense), which provides its common name.