Darkling-beetle
Guides
Stenomorpha macra
Stenomorpha macra is a species of darkling beetle in the family Tenebrionidae. It is a small, slender beetle species described by George Henry Horn in 1883. The genus Stenomorpha comprises elongate, parallel-sided beetles found primarily in arid regions of western North America. This species is part of a taxonomically challenging group where species boundaries remain under study.
Stenomorpha mckittricki
Stenomorpha mckittricki is a species of darkling beetle in the family Tenebrionidae, originally described by Pierce in 1954. The genus Stenomorpha comprises elongate, slender beetles primarily distributed in arid and semi-arid regions of western North America. This species appears to be rarely encountered, with limited documented observations. As with other tenebrionids, it is likely associated with dry habitats and nocturnal activity patterns.
Stenomorpha muricatula
Stenomorpha muricatula is a species of darkling beetle in the family Tenebrionidae, tribe Asidini. The genus Stenomorpha is large and taxonomically complex, with species distributed across arid and semi-arid regions of western North America, particularly the southwestern United States and Mexico. Members of this genus are generally flightless and associated with rocky or sandy habitats. The specific epithet "muricatula" suggests a rough or spiny surface texture. Like other Stenomorpha species, S. muricatula is likely nocturnal and cryptic in habit, with limited published information on its natural history.
Stenomorpha obliterata
Stenomorpha obliterata is a species of darkling beetle in the family Tenebrionidae, described by Champion in 1892. It is a small to medium-sized beetle native to Mexico. The genus Stenomorpha comprises numerous species of ground-dwelling tenebrionids, many of which are poorly studied and difficult to identify without examination of genitalia or other fine structural characters.
Stenomorpha obovata
Stenomorpha obovata is a species of darkling beetle in the family Tenebrionidae, first described by LeConte in 1851. The genus Stenomorpha comprises small to medium-sized beetles primarily distributed in arid and semi-arid regions of North America. This species is poorly documented in scientific literature, with minimal observational records available.
Stenomorpha obsoleta
Stenomorpha obsoleta is a species of darkling beetle in the family Tenebrionidae, first described by LeConte in 1851. The genus Stenomorpha is notably large and taxonomically complex, with modern revisionary work having reduced historically recognized species through synonymization. Like other members of this genus, S. obsoleta is flightless. The species occurs in arid and semi-arid regions of western North America.
Stenomorpha opaca
Stenomorpha opaca is a darkling beetle (Tenebrionidae) native to North America. The species is moderately well-documented through observational records, with over 700 observations on iNaturalist. As a member of a large and diverse family of beetles, it occupies arid and semi-arid habitats. Specific ecological details remain limited in published literature.
Stenomorpha parallela
Stenomorpha parallela is a species of darkling beetle in the family Tenebrionidae, tribe Asidini. The genus Stenomorpha historically contained 88 species with limited modern taxonomic revision until recent work by Fran Keller, who recognized 51 valid species with seven newly recognized subgenera. Certain Stenomorpha species occur in California vernal pools, though S. parallela itself is recorded from Mexico. Members of this genus include both flighted and flightless species.
Stenomorpha puncticollis
Stenomorpha puncticollis is a species of darkling beetle in the family Tenebrionidae, described by John Lawrence LeConte in 1866. It belongs to the tribe Cteniopodini within the subfamily Stenochiinae. The genus Stenomorpha comprises elongate, parallel-sided beetles distributed primarily in western North America. Observations of this species are relatively sparse, with 51 records documented on iNaturalist.
Stenomorpha quadricollis
Stenomorpha quadricollis is a species of darkling beetle in the family Tenebrionidae, described by Horn in 1880. The genus Stenomorpha comprises elongate, cylindrical beetles found primarily in arid and semi-arid regions of western North America. As a member of this genus, S. quadricollis likely exhibits the slender body form characteristic of the group. Published records for this species are sparse, and detailed biological information remains limited.
Stenomorpha rimata
Stenomorpha rimata is a species of darkling beetle in the family Tenebrionidae, tribe Asidini. The genus Stenomorpha is large and taxonomically complex, historically containing 88 species with limited modern revision until recent work by Fran Keller and colleagues. S. rimata was described by LeConte in 1854. Species in this genus occur in arid and semi-arid regions of western North America and Mexico, with some flightless species restricted to specific mountain ranges.
Stenomorpha vigens
Stenomorpha vigens is a species of darkling beetle in the family Tenebrionidae, described by Casey in 1912. It belongs to the large genus Stenomorpha, which has undergone significant taxonomic revision, with modern work recognizing 51 valid species and seven subgenera where 37 former species have been synonymized. The species is part of a genus that includes flightless species restricted to specific mountain ranges in Mexico, though the specific characteristics of S. vigens itself remain poorly documented in available literature.
Stenomorpha wickhami
Stenomorpha wickhami is a darkling beetle species in the family Tenebrionidae, transferred into the genus Stenomorpha from its original combination by Horn. It belongs to the furcata species group, a newly recognized informal grouping within Stenomorpha established to accommodate this species and three related taxa including the type species S. furcata, S. roosevelti, and S. granicollis. The species is native to the southwestern United States, specifically southern Arizona. As a member of the Asidini tribe, it shares the general characteristics of flightless or weakly flighted desert-dwelling tenebrionids, though specific biological details for this species remain poorly documented.
Steriphanus perovatus
Steriphanus perovatus is a species of darkling beetle in the family Tenebrionidae, described by Casey in 1907. It belongs to a genus of small to medium-sized beetles found in arid and semi-arid regions of western North America. Very few observations of this species have been documented.
Stibia
Stibia is a genus of darkling beetles (family Tenebrionidae) described by Horn in 1870. The genus is native to the Nearctic region and contains relatively few described species. Members of this genus are small to medium-sized beetles associated with arid and semi-arid habitats. The genus is poorly studied, with limited published information on its biology and ecology.
Strongylium aulicum
Coastal Colorful Darkling Beetle
Strongylium aulicum is a species of darkling beetle in the family Tenebrionidae, subfamily Stenochiinae. The species is part of a large genus distributed primarily in tropical and subtropical regions. The common name "Coastal Colorful Darkling Beetle" suggests association with coastal environments and distinctive coloration. The genus Strongylium is currently under taxonomic revision.
Strongylium crenatum
Strongylium crenatum is a darkling beetle (Tenebrionidae: Stenochiinae) first described by Mäklin. The species has been documented across much of the eastern and central United States, with 17 states represented in collection records and a first record from Iowa reported as a notable range extension. The genus Strongylium is currently undergoing taxonomic revision, with some species exhibiting distinctive coloration patterns including bright green or metallic markings on the head and pronotum.
Strongylium cultellatum
Strongylium cultellatum is a species of darkling beetle in the family Tenebrionidae, subfamily Stenochiinae. Originally described from South America, the species has been documented in India, representing a significant range extension. It belongs to a large genus of long-jointed beetles characterized by elongated bodies and relatively long legs. The species is part of a taxonomically challenging group with ongoing revisionary work.
Strongylium tenuicolle
Narrow-necked Strongylium
Strongylium tenuicolle is a species of darkling beetle in the family Tenebrionidae. It occurs in eastern and central Canada, with records from Manitoba, Ontario, and Quebec. The species has been documented on iNaturalist with nearly 950 observations, indicating it is moderately well-represented in citizen science datasets. The specific epithet 'tenuicolle' refers to its narrow-necked appearance.
Talanus
Talanus is a genus of darkling beetles (family Tenebrionidae) in the tribe Talanini. It was described by Jacquelin du Val in 1857. The genus is known from Colombia based on occurrence records. As a member of the subfamily Stenochiinae, these beetles are part of a diverse group of mostly tropical and subtropical tenebrionids.
Talanus mecoscelis
Talanus mecoscelis is a species of darkling beetle described by Triplehorn in 1968. It belongs to the genus Talanus within the family Tenebrionidae. The species is known from very few observations, with only two records documented on iNaturalist. Its distribution and biology remain poorly documented.
Tarpela undulata
Tarpela undulata is a species of darkling beetle (family Tenebrionidae) described by LeConte in 1866. As a member of this large family, it is likely associated with arid or semi-arid habitats typical of many tenebrionid beetles. The specific epithet 'undulata' suggests possible wavy or undulating patterns in its morphology.
Telabis
Telabis is a genus of darkling beetles in the family Tenebrionidae, established by Casey in 1890. The genus is native to the Nearctic region. Very few observations exist in public databases, with only 8 records on iNaturalist. The genus remains poorly documented in scientific literature.
Telesicles
Telesicles is a genus of darkling beetles in the family Tenebrionidae, established by Champion in 1888. The genus is currently recognized as valid and contains species distributed in the Nearctic region. Based on iNaturalist records, the genus has been documented in at least three observations, though specific biological details remain limited in published sources.
Tenebrio molitor
Yellow Mealworm Beetle, Mealworm Beetle, Yellow Mealworm
Tenebrio molitor, the yellow mealworm beetle, is a darkling beetle (Tenebrionidae) whose larvae are widely known as mealworms. Adults measure 12–25 mm in length, significantly smaller than the related superworm beetle Zophobas morio. The species has been mass-produced since the 1950s for fish bait, pet food, and backyard bird feeding. In January 2021, the European Union approved yellow mealworms for human consumption, marking a milestone for the edible insect industry. Research continues on optimizing rearing methods, with eight-year selection programs demonstrating 75% increases in pupal size.
Tenebrioninae
darkling beetles (subfamily)
Tenebrioninae is the largest subfamily of darkling beetles (Tenebrionidae), containing more than 20 tribes and including economically significant species such as flour beetles (Tribolium spp.) and the yellow mealworm (Tenebrio molitor). Following a major 2021 taxonomic revision, approximately half of the former species diversity was moved to the resurrected subfamily Blaptinae. The subfamily includes both stored-product pests and species used as feeder insects for reptiles and amphibians.
Texaponium triplehorni
Texaponium triplehorni is a species of darkling beetle (family Tenebrionidae) described by Berry in 1974. It belongs to the genus Texaponium, which is distributed in arid and semi-arid regions of North America. Very little published information exists on this species; it is known from few specimens and has been rarely observed in the field. The species epithet honors Norman Triplehorn, a prominent American coleopterist.
Thalpius undescribed-three
Thalpius undescribed-three is an as-yet-undescribed species within the darkling beetle genus Thalpius (family Tenebrionidae). As an undescribed taxon, it has not received formal scientific description or designation of a type specimen. The species epithet "undescribed-three" indicates it is recognized as a distinct morphospecies awaiting formal taxonomic treatment. Knowledge of its biology is limited to observations of preserved or field-collected specimens.
Tonibius
Tonibius is a genus of darkling beetles in the family Tenebrionidae, established by Thomas L. Casey in 1895. The genus is native to the Nearctic region, with records primarily from western North America. As a member of the diverse Tenebrionidae family, these beetles are adapted to arid and semi-arid environments. The genus remains relatively poorly documented in public sources, with limited species-level information available.
Tribolium audax
American Black Flour Beetle
Tribolium audax, commonly known as the American Black Flour Beetle, is a species of darkling beetle in the family Tenebrionidae. It belongs to the genus Tribolium, which contains several economically significant stored product pests. The species was described by Halstead in 1969. Distribution records indicate presence in multiple Canadian provinces including Alberta, British Columbia, Manitoba, Ontario, and Quebec.
Tribolium brevicorne
Tribolium brevicorne is a species of darkling beetle in the family Tenebrionidae. It is one of approximately 20 species in the genus Tribolium, which includes several well-known stored product pests. Unlike its more notorious congeners T. castaneum (red flour beetle) and T. confusum (confused flour beetle), T. brevicorne has received limited scientific study. The species has been documented in western North America, with records from British Columbia, Canada.
Tribolium parallelum
Tribolium parallelum is a species of darkling beetle in the family Tenebrionidae, genus Tribolium. The genus includes several economically important stored product pests, though specific information about T. parallelum's biology and pest status is limited in available sources. It is native to Mexico.
Trichiotes seriatus
Trichiotes seriatus is a species of darkling beetle (family Tenebrionidae) described by Casey in 1907. It is a member of the diverse beetle family Tenebrionidae, commonly known as darkling beetles, which are primarily detritivores and are abundant in arid and semi-arid environments. The genus Trichiotes is part of this widespread family, though specific ecological details for T. seriatus remain poorly documented.
Trichoton sordidum
Trichoton sordidum is a small, flightless darkling beetle (Tenebrionidae) native to the Sonoran Desert borderlands of southern Arizona and northern Mexico. The species exhibits sophisticated behavioral thermoregulation, including photonegativity and temperature-dependent activity patterns. Under resource limitation or environmental stress, individuals form adhesive aggregations or physical clumps of 2–10 beetles as a threat evasion mechanism. Dispersal follows cohesive patterns consistent with Minimum Risk Distribution models.
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pruinosa
Trimytis pruinosa is a species of darkling beetle in the family Tenebrionidae, described by John Lawrence LeConte in 1851. The genus Trimytis belongs to a diverse family of beetles commonly found in arid and semi-arid environments. Like other tenebrionids, this species is likely adapted to dry conditions and exhibits nocturnal behavior patterns. The specific epithet "pruinosa" refers to a frosted or powdery appearance, suggesting a characteristic waxy or dusty coating on the cuticle.
Triorophus laevis
Triorophus laevis is a species of darkling beetle in the family Tenebrionidae. The genus Triorophus belongs to this large family of beetles, which are characterized by hardened forewings and typically inhabit arid or semi-arid environments. Available information on this species is extremely limited, with only three observation records documented on iNaturalist and distribution records limited to Mexico.
Triorophus rugiceps
Triorophus rugiceps is a species of darkling beetle in the family Tenebrionidae, first described by John Lawrence LeConte in 1851. The genus Triorophus belongs to the tribe Tenebrionini, a group of primarily ground-dwelling beetles. This species is native to western North America. Like many tenebrionids, it is likely nocturnal and associated with arid or semi-arid habitats, though specific ecological details remain poorly documented.
Triphalopsis
Triphalopsis is a genus of darkling beetles in the family Tenebrionidae, established by Blaisdell in 1923. It is native to the Nearctic region and contains species adapted to arid and semi-arid environments typical of many tenebrionid beetles. The genus is poorly documented in scientific literature, with minimal published information on its biology and ecology.
Triphalopsis californica
Triphalopsis californica is a darkling beetle species in the family Tenebrionidae, described by Doyen in 1983. The genus Triphalopsis is part of a diverse family of beetles commonly associated with arid and semi-arid environments. This species is known from Mexico based on distribution records.
Trogloderus
Trogloderus is a genus of psammophilic darkling beetles (Coleoptera: Tenebrionidae) endemic to dunes and sandy habitats in the western United States. The genus comprises ten described species, including six new species described in 2019 from desert regions across the Intermountain Region. Molecular phylogenetic analysis dates the most recent common ancestor to 5.2 million years ago, with speciation driven by geographic features of the Lahontan Trough, Bouse Embayment, and Kaibab Plateau during the mid-Pleistocene.
Trogloderus arcanus
Trogloderus arcanus is a species of darkling beetle (Tenebrionidae) described in 2019. It belongs to the psammophilic genus Trogloderus, a group restricted to dunes and sandy habitats in the western United States. The species was described as part of a phylogenetic revision of the genus.
Trogloderus kandai
Trogloderus kandai is a psammophilic darkling beetle described in 2019 from Owens Valley, California. It belongs to a genus of six newly described species restricted to dunes and sandy habitats in the western United States. The species is part of the tribe Amphidorini, associated with desert stink beetles.
Trogloderus nevadus
Trogloderus nevadus is a darkling beetle (Tenebrionidae) in the psammophilic genus Trogloderus. Originally described in 1943 from dunes around Pyramid Lake, Nevada. The species was briefly treated as a subspecies of T. costatus (1946) but restored to specific standing by Johnston in 2018. It is restricted to sandy dune habitats in the western United States.
Trogloderus skillmani
Trogloderus skillmani is a newly described species of psammophilic darkling beetle (Tenebrionidae: Amphidorini) from the eastern Great Basin and Mohave Desert regions of the western United States. Described in 2019 by Johnston as part of a comprehensive phylogenetic revision of the genus, it is one of six new species recognized in a genus previously considered monotypic. The species is restricted to dunes and sandy desert habitats. Molecular phylogenetic analysis dates the most recent common ancestor of Trogloderus to approximately 5.2 million years ago, with current species having diversified during the mid-Pleistocene driven by geographic features of the Intermountain Region.
Trogloderus vandykei
Trogloderus vandykei is a darkling beetle (Coleoptera: Tenebrionidae) in the psammophilic genus Trogloderus. Originally described as a subspecies of T. costatus from outside 29 Palms, California, it was elevated to species status by Johnston (2018). The subspecific name T. costatus mayhewi was synonymized with T. vandykei. Like other members of its genus, this species is associated with sandy habitats in the western United States.
Trogloderus verpus
Trogloderus verpus is a psammophilic darkling beetle described in 2019 from the eastern Colorado Plateau. It belongs to a genus restricted to dunes and sandy habitats in the western United States, with species having diversified during the mid-Pleistocene in response to geographic features of the Intermountain Region.
Trogloderus warneri
Trogloderus warneri is a species of darkling beetle in the family Tenebrionidae, described by Johnston in 2019. It belongs to a genus of psammophilic beetles restricted to dunes and sandy habitats in the western United States. The species is endemic to the western Colorado Plateau region. As a member of a genus whose most recent common ancestor dates to approximately 5.2 million years ago, T. warneri likely arose during the mid-Pleistocene. The genus Trogloderus comprises six species, all adapted to sandy environments.
Typhlusechus
Typhlusechus is a genus of darkling beetles in the family Tenebrionidae, described by Linell in 1897. It belongs to the tribe Stenosini within the subfamily Pimeliinae. The genus is rarely encountered in collections and field observations, with minimal published biological information available.
Typhlusechus chemehuevii
Typhlusechus chemehuevii is a darkling beetle (family Tenebrionidae) described in 1985 from the southwestern United States. The species epithet honors the Chemehuevi people, whose traditional territory spans parts of California, Arizona, and Nevada. As a member of the genus Typhlusechus, it belongs to a group of small, often eye-reduced beetles associated with arid environments. The species remains poorly known due to limited collection records and no documented observations in biodiversity databases such as iNaturalist.
Typhlusechus singularis
Typhlusechus singularis is a species of darkling beetle (Tenebrionidae) described by Linell in 1897. The genus Typhlusechus contains few described species and is characterized by reduced or absent eyes, an adaptation associated with subterranean or cave-dwelling habits. This species is part of a group of tenebrionids that have evolved morphological specializations for life in darkness, including elongated appendages and depigmentation. Records indicate extremely limited observation data, with only 4 documented observations in iNaturalist.