Tenebrionidae
Guides
Eusattus reticulatus
Sand Darkling Beetle
Eusattus reticulatus is a species of darkling beetle in the family Tenebrionidae, commonly known as the sand darkling beetle. It inhabits sandy environments in southwestern North America. The species is primarily ground-dwelling and has been observed in association with juniper-oak-pinyon woodland on sandstone escarpments. Like other members of the genus, it is adapted to arid and semi-arid conditions.
Eutochia
Eutochia is a genus of darkling beetles in the family Tenebrionidae, established by LeConte in 1862. The genus contains relatively few described species and is characterized by its placement within the diverse tenebrionid radiation. Members of this genus are small to medium-sized beetles with the general body plan typical of many Tenebrionidae. The genus appears to be sparsely collected and poorly represented in biological collections.
Eutochia crenata
A darkling beetle species in the family Tenebrionidae, described by LeConte in 1866. Very little published information exists on the biology or ecology of this species.
Gnatocerus guatemalensis
Gnatocerus guatemalensis is a species of darkling beetle in the family Tenebrionidae. The genus Gnatocerus is known for species with enlarged mandibles in males, which function as weapons in male-male combat for mating opportunities. This species is native to Mexico and belongs to a genus closely related to the well-studied flour beetle Tribolium.
Gnatocerus maxillosus
flour beetle
Gnatocerus maxillosus is a species of darkling beetle in the family Tenebrionidae. It is a stored product pest commonly associated with grain and flour storage facilities. The species is known for its distinctive enlarged mandibles in males, which function as weapons in male-male combat. It has been documented from several European countries including France, Italy, and Albania, as well as the Canary Islands.
Gondwanocrypticus
Gondwanocrypticus is a genus of darkling beetles in the family Tenebrionidae, established by Koch in 1950. The genus is currently treated as a synonym in some taxonomic treatments. Records indicate presence in the Nearctic and Neotropical regions. The genus name references Gondwana, suggesting historical biogeographic connections to the southern supercontinent.
Gondwanocrypticus pictus
Gondwanocrypticus pictus is a species of darkling beetle (family Tenebrionidae) described by Gebien in 1928. The genus name Gondwanocrypticus suggests a Gondwanan distribution pattern, though specific details about this species' biology, ecology, and distribution remain poorly documented in available literature. The species epithet 'pictus' (Latin for 'painted') likely refers to distinctive coloration or markings.
Haplandrus fulvipes
Haplandrus fulvipes is a species of darkling beetle in the family Tenebrionidae, first described by Herbst in 1797. It is a small beetle native to eastern North America, with documented occurrence in southeastern Canada. The species is part of the diverse genus Haplandrus, which contains numerous small tenebrionid beetles. Based on iNaturalist records, it appears to be moderately well-observed in its native range.
Helops angustus
Helops angustus is a species of darkling beetle in the family Tenebrionidae, first described by LeConte in 1859. Darkling beetles in this genus are characterized by elongated, somewhat flattened bodies and antennae with bead-like segments. Members of Helops are typically found in arid and semi-arid habitats of western North America. The genus is distinguished from similar tenebrionid genera by its relatively slender form and antennal structure.
Helops arizonensis
Helops arizonensis is a darkling beetle (family Tenebrionidae) described by George Henry Horn in 1874. The species epithet reflects its association with Arizona. As a member of the genus Helops, it belongs to a group of darkling beetles that can be distinguished from superficially similar ground beetles (Carabidae) by concealed mandibles and bead-like antennae, though some Helops species exhibit ground beetle-like antennae. The genus Helops is noted for species with elongated antennae segments that approach the filiform appearance of carabids, making identification more challenging than with typical darkling beetles.
Helops attenuatus
attenuated darkling beetle
Helops attenuatus is a North American darkling beetle in the family Tenebrionidae, first described by LeConte in 1851. The species belongs to a genus characterized by elongated body forms and relatively long antennae compared to many tenebrionids. Like other members of the tribe Helopini, it exhibits morphological traits that can cause confusion with ground beetles (Carabidae), particularly in antennae structure.
Helops bachei
Helops bachei is a darkling beetle in the family Tenebrionidae, described by John Lawrence LeConte in 1861. The genus Helops contains species that can be challenging to distinguish from ground beetles (Carabidae) due to some shared morphological features. Like other Helops species, H. bachei possesses antennae with segments longer than wide, resembling the filamentous antennae of ground beetles rather than the bead-like antennae typical of many darkling beetles. However, it can be identified as a tenebrionid by its concealed mandibles. The species is native to North America.
Helops callosus
Helops callosus is a darkling beetle in the family Tenebrionidae, described by Casey in 1890. The genus Helops belongs to a group of darkling beetles that can be challenging to distinguish from ground beetles (Carabidae) without close examination. Members of this genus exhibit some characteristics that blur typical distinctions between carabids and tenebrionids, such as antennae structure that resembles ground beetles while retaining concealed mandibles typical of darkling beetles.
Helops confluens
Helops confluens is a species of darkling beetle in the family Tenebrionidae, described by Casey in 1924. As a member of the genus Helops, it belongs to a group of beetles commonly found in arid and semi-arid habitats across North America. The genus Helops is part of the diverse darkling beetle family, which contains over 20,000 described species worldwide. Information specific to H. confluens appears limited in the available literature.
Helops discipulus
Helops discipulus is a species of darkling beetle in the family Tenebrionidae, described by Casey in 1891. As a member of the genus Helops, it belongs to the tribe Helopini within the subfamily Tenebrioninae. The genus Helops is primarily distributed in North America. Darkling beetles in this genus are typically found in terrestrial habitats and are characterized by their concealed mandibles and bead-like antennae segments, distinguishing them from predatory ground beetles.
Helops farctus
Helops farctus is a species of darkling beetle in the family Tenebrionidae, described by John Lawrence LeConte in 1858. As a member of this family, it belongs to a group of beetles characterized by hardened forewings and typically detritivorous or herbivorous feeding habits. The genus Helops is part of the diverse tenebrionid fauna of North America.
Helops fresnoensis
Helops fresnoensis is a darkling beetle in the family Tenebrionidae, described by Blaisdell in 1931. The species epithet indicates a type locality in Fresno, California. As a member of the genus Helops, it belongs to a group of darkling beetles that can be distinguished from ground beetles by concealed mandibles and bead-like antennae segments, though some Helops species have antennae that approach the filiform condition seen in Carabidae.
Helops impolitus
Helops impolitus is a darkling beetle species in the family Tenebrionidae, first described by John Lawrence LeConte in 1866. As a member of the genus Helops, it belongs to a group of beetles that can be challenging to distinguish from ground beetles (Carabidae) due to superficial similarities. The genus Helops includes species that may exhibit atypical morphological traits for darkling beetles, such as antennae that resemble those of ground beetles.
Helops laetus
Helops laetus is a species of darkling beetle in the family Tenebrionidae, described by LeConte in 1857. It belongs to the genus Helops, a group of darkling beetles found in western North America. The species is known from British Columbia, Canada. Darkling beetles in this genus are typically associated with forested habitats and are characterized by their elongated body form and relatively long antennae compared to some other tenebrionid genera.
Helops opacus
Helops opacus is a species of darkling beetle in the family Tenebrionidae, described by LeConte in 1859. Like other members of the genus Helops, it belongs to a group of darkling beetles that are not part of the well-known Eleodes genus but share the family characteristics of concealed mandibles and bead-like antennae segments. The genus Helops is relatively obscure compared to the more frequently encountered darkling beetles, and specific ecological details for H. opacus remain poorly documented in the available literature.
Helops perforatus
Helops perforatus is a species of darkling beetle in the family Tenebrionidae, described by Horn in 1880. The genus Helops belongs to a group of darkling beetles that can be challenging to distinguish from ground beetles (Carabidae) due to convergent morphological traits. Like other members of its family, it is likely associated with decomposing organic matter and aridland ecosystems, though specific natural history details for this species remain poorly documented.
Helops pernitens
Helops pernitens is a darkling beetle in the family Tenebrionidae, first described by LeConte in 1861. The species is notable for possessing antennae that resemble those of ground beetles (Carabidae)—elongated and filament-like rather than the bead-like form typical of most tenebrionids. This morphological convergence can lead to misidentification with predatory ground beetles. The species is found in western North America, with records from British Columbia, Canada.
Helops rufipes
Helops rufipes is a darkling beetle in the family Tenebrionidae, first described by LeConte in 1851. The species epithet "rufipes" refers to its reddish legs. As a member of the genus Helops, it belongs to a group of darkling beetles that can be challenging to distinguish from ground beetles (Carabidae) due to superficial similarities. The genus Helops includes species that exhibit antennae resembling those of ground beetles, with segments longer than wide, unlike the bead-like antennae typical of many other darkling beetles.
Helops rugicollis
Helops rugicollis is a darkling beetle in the family Tenebrionidae, described by LeConte in 1866. The genus Helops includes species with elongated bodies and antennae that can resemble ground beetles, requiring careful examination for proper identification. This species is part of a diverse group of tenebrionids found in various habitats across North America.
Helops rugulosus
Helops rugulosus is a species of darkling beetle in the family Tenebrionidae, first described by John Lawrence LeConte in 1851. The genus Helops belongs to the tribe Helopini within the subfamily Tenebrioninae. Species in this genus are typically associated with decaying wood and forest floor habitats. Like other darkling beetles, they are characterized by concealed mandibles and bead-like antennae segments.
Helops spretus
Helops spretus is a species of darkling beetle in the family Tenebrionidae, described by George Henry Horn in 1880. The genus Helops belongs to a diverse family of beetles commonly found in arid and semi-arid environments. Members of this genus are typically elongate and somewhat flattened in body form. No specific biological or ecological information for H. spretus has been documented in the provided sources.
Helops stenotrichoides
Helops stenotrichoides is a species of darkling beetle in the family Tenebrionidae, described by Blaisdell in 1895. It belongs to the genus Helops, which comprises darkling beetles found primarily in western North America. Like other members of its family, it is likely associated with decomposing plant matter and detritus in arid or semi-arid environments. The species name suggests a resemblance to or relationship with another taxon bearing the name 'stenotrichus'.
Helops sulcipennis
Helops sulcipennis is a species of darkling beetle (family Tenebrionidae) described by John Lawrence LeConte in 1866. As a member of the tribe Helopini, this beetle belongs to a group of elongate, moderately sized tenebrionids that are primarily found in North America. The specific epithet 'sulcipennis' refers to grooved or furrowed elytra, a characteristic feature of this species. Like other Helopini, this beetle is likely associated with decaying wood and forest floor habitats.
Helops tumescens
Helops tumescens is a species of darkling beetle in the family Tenebrionidae, first described by LeConte in 1866. The genus Helops is part of a diverse family of beetles commonly found in arid and semi-arid environments. Darkling beetles in this family are generally characterized by their robust exoskeletons and slow, deliberate movement.
Hymenochara arizonensis
Hymenochara arizonensis is a species of darkling beetle in the family Tenebrionidae, described by Campbell in 1978. As a member of this large beetle family, it shares characteristics typical of tenebrionids including a hardened exoskeleton and generally nocturnal habits. The species epithet 'arizonensis' indicates its association with Arizona, though specific details about its biology remain poorly documented in available literature.
Hymenochara rufipes
Hymenochara rufipes is a species of darkling beetle in the family Tenebrionidae, described by John Lawrence LeConte in 1824. The specific epithet "rufipes" refers to reddish legs, a common diagnostic trait in this species. As a member of Tenebrionidae, it belongs to one of the largest beetle families, with members typically associated with dry habitats and often exhibiting nocturnal behavior. The species is documented from eastern Canada, specifically Ontario and Québec.
Hymenorus
comb-clawed beetles
Hymenorus is a genus of comb-clawed beetles in the family Tenebrionidae, containing more than 160 described species. These beetles were formerly classified in their own family Alleculidae but are now recognized as a subfamily within Tenebrionidae. They are characterized by their distinctive antennae and do not conform to the typical appearance of 'classic' darkling beetles.
Hymenorus
comb-clawed beetle
Hymenorus is a genus of comb-clawed beetles in the subfamily Alleculinae, family Tenebrionidae. These beetles were formerly classified in their own family Alleculidae before being subsumed into Tenebrionidae. They do not resemble 'classic' darkling beetles and represent one of several groups that complicate identification of this family. The 'sp-two-eastern' designation suggests an undescribed or provisionally identified species found in eastern North America.
Hymenorus arkansanus
Hymenorus arkansanus is a species of comb-clawed beetle in the family Tenebrionidae, subfamily Alleculinae. It was described by Fall in 1931. The genus Hymenorus was formerly classified as a separate family (Alleculidae) but has been reclassified as a subfamily within Tenebrionidae. Members of this genus do not resemble typical darkling beetles in appearance.
Hymenorus densus
Hymenorus densus is a small beetle species in the family Tenebrionidae, specifically within the subfamily Alleculinae (comb-clawed beetles). The genus Hymenorus was historically classified as a separate family (Alleculidae) before being subsumed into Tenebrionidae. Species in this genus are characterized by comb-like tarsal claws and relatively long, thread-like antennae that can resemble those of ground beetles (Carabidae), potentially causing identification confusion. H. densus was described by John Lawrence LeConte in 1866 and is known from Mexico.
Hymenorus discretus
Hymenorus discretus is a species of comb-clawed beetle in the family Tenebrionidae, subfamily Alleculinae. It was described by Thomas L. Casey in 1891. Like other members of the Alleculinae, it does not conform to the typical 'darkling beetle' morphology, possessing antennae that more closely resemble those of ground beetles (Carabidae). The species is recorded from Ontario and Québec in Canada.
Hymenorus dissensus
Comb-clawed beetle
Hymenorus dissensus is a species of comb-clawed beetle in the family Tenebrionidae, subfamily Alleculinae. Like other members of this subfamily, it possesses comb-like tarsal claws. The genus Hymenorus was historically classified as a separate family (Alleculidae) before being incorporated into Tenebrionidae. Very little species-specific information is documented for H. dissensus.
Hymenorus dorsalis
Hymenorus dorsalis is a small beetle in the family Tenebrionidae, specifically within the subfamily Alleculinae (comb-clawed beetles). Originally described by Schwarz in 1878, this species is part of a group of darkling beetles that were formerly classified as a separate family before being assimilated into Tenebrionidae. The genus Hymenorus is characterized by antennae with longer segments that superficially resemble those of ground beetles (Carabidae), making visual identification challenging without close examination. Records of this species are sparse, with limited observational data available.
Hymenorus heteropygus
Hymenorus heteropygus is a small darkling beetle in the subfamily Alleculinae (comb-clawed beetles), described by Fall in 1931. As a member of the Tenebrionidae, it belongs to a group of beetles formerly classified as a separate family but now subsumed into the darkling beetles. Species in this genus and subfamily are typically small, inconspicuous beetles that do not resemble the more familiar 'classic' darkling beetles like Eleodes.
Hymenorus humeralis
Hymenorus humeralis is a species of comb-clawed beetle in the family Tenebrionidae, subfamily Alleculinae. First described by LeConte in 1866, this species belongs to a group formerly classified as the separate family Alleculidae. Comb-clawed beetles are characterized by their distinctive antennae and tarsal claws, and are now recognized as a subfamily within the darkling beetles.
Hymenorus illusus
Hymenorus illusus is a small beetle species in the family Tenebrionidae, specifically within the subfamily Alleculinae (comb-clawed beetles). The species was described by Fall in 1931. As a member of Alleculinae, it possesses the distinctive comb-like tarsal claws that characterize this group. Comb-clawed beetles were formerly treated as a separate family but are now classified within Tenebrionidae.
Hymenorus niger
Hymenorus niger is a species of comb-clawed beetle in the family Tenebrionidae. Formerly classified in the separate family Alleculidae, this species was reassigned to Tenebrionidae as part of the subfamily Alleculinae. The genus Hymenorus is characterized by elongated bodies and antennae with bead-like segments. Hymenorus niger has been recorded in several Canadian provinces including Manitoba, New Brunswick, Nova Scotia, Ontario, and Prince Edward Island.
Hymenorus obesus
Hymenorus obesus is a small comb-clawed beetle in the family Tenebrionidae, subfamily Alleculinae. It was described by Thomas L. Casey in 1891 based on specimens from North America. The species belongs to a group formerly classified as the separate family Alleculidae, now treated as a subfamily within Tenebrionidae. Members of this genus are typically small, soft-bodied beetles with comb-like claws on their tarsi. Available records indicate this species occurs in eastern and central Canada.
Hymenorus picipennis
Hymenorus picipennis is a species of comb-clawed beetle in the family Tenebrionidae, subfamily Alleculinae. The genus Hymenorus was historically classified as a separate family but is now treated as a subfamily within Tenebrionidae. Species in this group are small beetles with distinctive antennae and are part of the diverse darkling beetle fauna of North America. The specific epithet "picipennis" refers to the pitch-black coloration of the legs.
Hymenorus sinuatus
Hymenorus sinuatus is a species of comb-clawed beetle in the family Tenebrionidae, subfamily Alleculinae. The genus Hymenorus was formerly classified in its own family but is now treated as part of Tenebrionidae. This species was described by Fall in 1931. Members of the Alleculinae differ from typical darkling beetles in having more elongate bodies and comb-like claws on the hind tarsi.
Hymenorus texensis
Hymenorus texensis is a species of comb-clawed beetle in the family Tenebrionidae, subfamily Alleculinae. Described by Fall in 1931, this species belongs to a group formerly treated as the separate family Alleculidae before being reclassified as a subfamily of Tenebrionidae. Comb-clawed beetles in this genus typically have antennae with segments longer than wide, resembling ground beetles (Carabidae), but differ in having concealed mandibles. The species epithet "texensis" indicates a type locality or primary distribution in Texas.
Idiobates castaneus
Idiobates castaneus is a North American darkling beetle and the sole member of its genus. The species is known from eastern Canada and has been documented in Ontario and Québec. Its life history includes described larval and pupal stages. The genus Idiobates is monotypic within the family Tenebrionidae.
Iphthiminus opacus
Cloudy Darkling Beetle
A darkling beetle in the family Tenebrionidae, found in eastern North America from Canada through the northeastern United States. Adults are nocturnal and have been observed on coniferous trees, particularly pines. The species is part of a genus that includes several North American species associated with forested habitats.
Isomira comstocki
Isomira comstocki is a species of darkling beetle in the family Tenebrionidae, described by Papp in 1956. The species is recorded from western Canada, specifically Alberta and British Columbia. As a member of the genus Isomira, it belongs to a group of small to medium-sized tenebrionid beetles. Information on its biology and ecology is limited.
Isomira quadristriata
Isomira quadristriata is a species of darkling beetle in the family Tenebrionidae, first described by Couper in 1865. It belongs to a genus of small to medium-sized beetles commonly associated with decaying organic matter. The species has been documented across multiple Canadian provinces, suggesting adaptation to temperate North American environments.