Desert-beetle
Guides
Acmaeodera cazieri
Acmaeodera cazieri is a species of metallic wood-boring beetle in the family Buprestidae, described by Knull in 1960. It occurs in the southwestern United States and northern Mexico, where it has been collected from flowers of various herbaceous plants and shrubs. The species is associated with desert and semi-arid habitats, particularly in Arizona and adjacent regions. Adults have been observed on yellow-flowered composites, prickly poppy (Argemone), and trailing four o'clock (Allionia incarnata).
Acmaeodera diffusa
Acmaeodera diffusa is a metallic wood-boring beetle in the family Buprestidae, described by Barr in 1969. The species is known from western North America, with records from Utah and surrounding regions. Adults are flower visitors, frequently collected from blooms of pricklypear cacti (Opuntia), globemallow (Sphaeralcea), and other desert forbs. Like other Acmaeodera species, larvae likely develop in dead or dying woody plants, though specific host associations remain incompletely documented.
Acmaeodera gibbula
Acmaeodera gibbula is a metallic wood-boring beetle in the family Buprestidae, first described by LeConte in 1858. The species exhibits the characteristic jewel beetle morphology with metallic coloration. It has been documented in the southwestern United States and Mexico, with field observations from Arizona and surrounding regions. Adults have been collected from flowers of various host plants including Acacia species and yellow-flowered composites.
Acmaeoderopsis rockefelleri
Acmaeoderopsis rockefelleri is a species of metallic wood-boring beetle in the family Buprestidae. It occurs in arid regions of the southwestern United States and Mexico. The species is associated with mesquite (Prosopis) and acacia (Acacia) host plants, where adults have been collected by beating vegetation.
Aconobius densus
Aconobius densus is a species of darkling beetle in the family Tenebrionidae, described by Thomas L. Casey in 1914. It belongs to the genus Aconobius, a small group of tenebrionid beetles. The species is native to western North America. Like other members of its family, it is adapted to arid or semi-arid environments. Published biological information on this species is extremely limited.
Alaudes
Alaudes is a genus of darkling beetles in the family Tenebrionidae, subfamily Pimeliinae, tribe Cnemeplatiini. The genus was revised in 2018, resulting in the description of new species from the southwestern United States and Mexico. It belongs to the subtribe Alaudina, which was established as part of that revisionary work. Members of this genus are part of a diverse radiation of tenebrionid beetles adapted to arid and semi-arid environments.
Anchomma
Anchomma is a genus of darkling beetles (family Tenebrionidae) established by John Lawrence LeConte in 1858. It belongs to the subfamily Pimeliinae, tribe Stenosini, and subtribe Dichillina. The genus is characterized by morphological features typical of the subtribe Dichillina, including adaptations associated with arid environments. Knowledge of this genus is limited due to its rarity in collections and few documented observations.
Aneflus levettei
Aneflus levettei is a species of longhorn beetle (family Cerambycidae) in the tribe Elaphidiini, described by Thomas L. Casey in 1891. Larvae are root-feeders on velvetpod mimosa (Mimosa dysocarpa), with pupation occurring below the soil surface. Adults have been observed resting on foliage of Baccharis sarothroides (desert broom). The species occurs in the southwestern United States and Mexico.
Aneflus prolixus
Aneflus prolixus is a longhorn beetle species in the tribe Elaphidiini, first described by John Lawrence LeConte in 1873. The species belongs to a genus of relatively small cerambycids. Observations indicate association with Baccharis sarothroides, a desert shrub. It occurs in the southwestern United States and Mexico.
Araeoschizus airmeti
Araeoschizus airmeti is a species of darkling beetle in the family Tenebrionidae, described by Tanner in 1945. It belongs to the genus Araeoschizus, a group of beetles found in arid and semi-arid regions of western North America. The species is known from very few observations, suggesting it may be rare, geographically restricted, or under-collected. Like other members of its family, it likely inhabits dry environments and exhibits nocturnal or crepuscular activity patterns.
Araeoschizus andrewsi
Araeoschizus andrewsi is a species of darkling beetle in the family Tenebrionidae, described by Papp in 1981. The genus Araeoschizus belongs to the large and diverse family Tenebrionidae, which comprises primarily detritivorous beetles found in arid and semi-arid environments. Very little specific information is documented about this particular species beyond its taxonomic description.
Araeoschizus apachensis
Araeoschizus apachensis is a darkling beetle species in the family Tenebrionidae, described by Papp in 1981. The genus Araeoschizus contains species characterized by flattened body forms adapted for living under bark or in rock crevices. This species is known from a small number of observations, primarily from the southwestern United States.
Archophileurus cribrosus
Archophileurus cribrosus is a species of rhinoceros beetle in the family Scarabaeidae, subfamily Dynastinae. It is native to the southwestern United States and northern Mexico. The species belongs to the tribe Phileurini, a group characterized by distinctive morphological features. It has been documented across multiple states and Mexican states, primarily in arid and semi-arid regions.
Asbolus
blue death-feigning beetles
Asbolus is a small genus of darkling beetles (family Tenebrionidae) native to the southwestern United States and Mexico. The genus contains four species, including the well-known Asbolus verrucosus, commonly called the blue death-feigning beetle. These beetles are adapted to arid desert environments and exhibit a distinctive blue coloration derived from a waxy coating that prevents desiccation. The genus is notable for its thanatosis behavior—playing dead when threatened.
Asbolus laevis
Asbolus laevis is a darkling beetle (family Tenebrionidae) native to the southwestern United States and northwestern Mexico. First described by LeConte in 1851, it inhabits arid, sandy environments including the Sonoran Desert. The species is distinguished from its congener Asbolus verrucosus by its smaller size, smooth glossy black exoskeleton, and finely dotted elytra with marginal studded points.
Asbolus mexicanus
Asbolus mexicanus is a darkling beetle species described by Champion in 1884. It occurs in the southwestern United States and northern Mexico, inhabiting arid environments with sandy or scrubby vegetation. The species was originally distinguished from congeners by its opaque, broader, and less convex body form, with a flatter thorax and characteristic elytral punctation.
Asbolus papillosus
Asbolus papillosus is a darkling beetle (family Tenebrionidae) native to the southwestern United States and northwestern Mexico. It inhabits arid, sandy environments including the Sonoran Desert. The species is distinguished from congeners by its granular elytra and relatively short tarsal hairs. Like other members of the genus, it likely exhibits thanatosis (death-feigning behavior) as an antipredator defense, though this has not been specifically documented for this species.
Asidini
Asidini is a tribe of darkling beetles (Tenebrionidae: Pimeliinae) containing more than 30 genera and over 260 described species in North America alone. Members are primarily flightless and inhabit arid and semi-arid environments across western North America and Mexico. The tribe is notable for exhibiting diverse defensive strategies including crypsis and Batesian mimicry of chemically defended Eleodes species.
Branchus
Branchus is a genus of darkling beetles in the family Tenebrionidae, subfamily Pimeliinae, and tribe Branchini. The genus was established by John Lawrence LeConte in 1862. It is placed within the speciose superfamily Tenebrionoidea, which includes many arid-adapted beetle lineages. The genus name derives from Greek mythology, though this etymological connection has no biological significance.
Cerenopus
Cerenopus is a genus of darkling beetles in the family Tenebrionidae, tribe Cerenopini. The genus was established by John Lawrence LeConte in 1851 and is native to North America. Species in this genus are ground-dwelling beetles associated with arid and semi-arid environments. The genus is moderately well-represented in entomological collections, with over 500 observations documented on iNaturalist.
Cheirodes
Cheirodes is a genus of darkling beetles (Tenebrionidae) in the tribe Melanimonini. The genus was established by Géné in 1839 and was revived in 1973 when T. J. Spilman synonymized the later name Anemia (Laporte, 1840) with Cheirodes. It contains numerous species distributed across Africa, Europe, Asia, and North America, organized into six recognized subgenera. Many species were originally described under Anemia and later transferred to Cheirodes.
Coniontis
Coniontis is a genus of darkling beetles (family Tenebrionidae) in the tribe Coniontini. The genus was established by Eschscholtz in 1829 and contains multiple species distributed primarily in western North America. These beetles are generally associated with arid and semi-arid habitats. The genus is well-represented in entomological collections and citizen science observations.
Crossidius suturalis intermedius
Crossidius suturalis intermedius is a subspecies of longhorn beetle in the family Cerambycidae, described by LeConte in 1873. It belongs to the highly variable species C. suturalis, which occurs across southwestern North America. The subspecies has been collected in association with flowers of Isocoma tenuisecta (burroweed), a composite plant in the Asteraceae family. Field observations indicate it is found in arid and semi-arid habitats of the southwestern United States and adjacent Mexico, with adults active during late summer and early autumn when host plants bloom.
Cryptoglossa infausta
Cryptoglossa infausta is a darkling beetle in the family Tenebrionidae, first described by John Lawrence LeConte in 1854. The genus Cryptoglossa is a small, distinctive group within the tribe Cryptoglossini, characterized by modified mouthpart structures. This species occurs in Mexico and is part of a genus associated with arid and semi-arid environments. Observations suggest it is active in warmer months, though detailed ecological studies are limited.
Cryptoglossa variolosa
Black Death-feigning Beetle
Cryptoglossa variolosa is a species of darkling beetle in the family Tenebrionidae, commonly known as the Black Death-feigning Beetle. It occurs in arid regions of Mexico and the southwestern United States. The species is notable for its ability to feign death (thanatosis) when disturbed. It is one of several Cryptoglossa species adapted to desert environments.
Cysteodemus wislizeni
black bladder-bodied meloid, black bladder-bodied blister beetle
Cysteodemus wislizeni, commonly known as the black bladder-bodied meloid or black bladder-bodied blister beetle, is a species of blister beetle in the family Meloidae. The species is notable for its highly inflated, bladder-like body form that distinguishes it from most other meloids. It occurs in arid and semi-arid regions of the southwestern United States and northern Mexico, where adults have been observed feeding on flowers of Tribulus terrestris (puncture vine) and associated with Solanum elaeagnifolium (silverleaf nightshade).
Derobrachus hovorei
Palo Verde Root Borer, Palo Verde Beetle, Palo Verde Borer Beetle
Derobrachus hovorei is a large longhorn beetle native to the southwestern United States and northern Mexico. It was formally described as a distinct species by Santos-Silva in 2007, having been previously confused with D. geminatus for over a century. Adults are among the largest beetles in North America, reaching up to 3.5 inches in length. The species is named for its larval association with palo verde trees (Parkinsonia spp.), though it has been observed feeding on roots of various other tree species in urban environments.
Edrotes
hairy robot beetle, desert hairy robot beetle
Edrotes is a genus of darkling beetles (Tenebrionidae) in the tribe Edrotini, characterized by small, rounded body forms adapted to arid environments. The genus includes species such as Edrotes ventricosus, which exhibits a distinctive fuzzy appearance due to dorsal setae. Members inhabit desert regions of southwestern North America and display seasonal activity patterns influenced by temperature.
Edrotes rotundus
Edrotes rotundus is a species of darkling beetle in the family Tenebrionidae. It is native to North America and has been documented in the southwestern United States and Mexico. The genus Edrotes is characterized by small, rounded body forms adapted to arid environments. Records from Colorado represent range extensions beyond the species' previously documented distribution.
Eleodes acuta
desert stink beetle
Eleodes acuta is a large desert stink beetle in the family Tenebrionidae. It is closely related to and frequently confused with E. suturalis, with which it shares similar size, coloration, and habitat preferences. The species occurs in the Great Plains and southwestern United States, including areas of South Dakota and New Mexico. It is primarily nocturnal and exhibits the defensive head-stand behavior characteristic of the genus Eleodes.
Eleodes caudifera
desert stink beetle
Eleodes caudifera is a species of darkling beetle in the family Tenebrionidae, commonly referred to as a desert stink beetle. The species is native to arid regions of western North America and exhibits the defensive head-standing behavior typical of the genus Eleodes. It has been documented in sandy desert habitats, particularly in association with dune systems. The species was described by LeConte in 1858.
Eleodes cordata
desert stink beetle, clown beetle
Eleodes cordata is a species of darkling beetle in the family Tenebrionidae, commonly referred to as a desert stink beetle or clown beetle. The species is part of a large genus of flightless, ground-dwelling beetles native to arid and semi-arid regions of North America. Like other Eleodes species, it possesses defensive chemical capabilities and exhibits the characteristic "headstand" defensive posture when threatened. The species was described by Eschscholtz in 1829.
Eleodes dissimilis
desert stink beetle
Eleodes dissimilis is a species of desert stink beetle in the family Tenebrionidae. It was described by Blaisdell in 1909. The species belongs to the genus Eleodes, a diverse group of darkling beetles commonly known as stink beetles due to their defensive chemical secretions. Distribution records indicate presence in Mexico.
Eleodes extricata
Extricated Darkling Beetle
Eleodes extricata is a species of darkling beetle in the family Tenebrionidae, commonly known as the extricated darkling beetle or desert stink beetle. It belongs to the genus Eleodes, a group often referred to as clown beetles or stink beetles due to their defensive behavior of raising their abdomen when threatened. The species was originally described by Thomas Say in 1824 as Blaps extricata. Records indicate a distribution in Mexico.
Eleodes fuchsii
Eleodes fuchsii is a darkling beetle in the family Tenebrionidae, first described by Blaisdell in 1909. As a member of the genus Eleodes, it belongs to a group commonly known as "clown beetles" or "stink beetles," recognized for their defensive posture of raising the abdomen when disturbed. The species is part of a large North American genus with over 200 described species, many of which inhabit arid and semi-arid regions.
Eleodes fusiformis
desert stink beetle, clown beetle
Eleodes fusiformis is a species of desert stink beetle in the family Tenebrionidae, described by LeConte in 1858. As a member of the genus Eleodes, it shares the characteristic defensive head-standing behavior common to clown beetles. The species is found in arid regions of western North America. Like other Eleodes species, it possesses chemical defense glands that produce noxious secretions when disturbed.
Eleodes gigantea
desert stink beetle, darkling beetle
Eleodes gigantea is a large darkling beetle in the family Tenebrionidae, commonly known as the desert stink beetle. It is distributed along the Pacific coast of North America from central California to Baja California, Mexico. When threatened, it exhibits the characteristic defensive behavior of the genus Eleodes: raising its body and secreting benzoquinone compounds from abdominal glands. The subspecies E. gigantea meridionalis has been documented in Pleistocene deposits at the La Brea Tar Pits.
Eleodes gracilis
desert stink beetle
Eleodes gracilis is a species of desert stink beetle in the family Tenebrionidae, first described by LeConte in 1858. The species belongs to the genus Eleodes, commonly known as stink beetles or darkling beetles, which are characterized by their defensive behavior of raising the abdomen when disturbed. Two subspecies are recognized: Eleodes gracilis gracilis and Eleodes gracilis distans. The species is distributed in Mexico and has been recorded in the southwestern United States.
Eleodes hispilabris
Rough-lipped Darkling Beetle, desert stink beetle
Eleodes hispilabris is a darkling beetle (Tenebrionidae) native to North America, where it occurs in arid and semi-arid regions including the Great Plains. It is closely related to and frequently confused with Eleodes suturalis, sharing similar size, coloration, and a reddish-brown sutural stripe on the elytra. The species exhibits scale-dependent habitat selection and performs the characteristic defensive 'head stand' behavior typical of the genus Eleodes.
Eleodes littoralis
desert stink beetle
Eleodes littoralis is a species of desert stink beetle in the family Tenebrionidae. It is found in California. The species is characterized by its hairy body, which makes it visually similar to Eleodes osculans and Eleodes nigropilosa. Like other members of the genus Eleodes, it possesses defensive chemical glands that produce a characteristic odor when disturbed.
Eleodes longicollis
desert stink beetle, clown beetle
Eleodes longicollis is a species of darkling beetle in the family Tenebrionidae, commonly known as the desert stink beetle or clown beetle. It is a large, flightless beetle native to arid regions of the southwestern United States and northern Mexico. The species is notable for its distinctive defensive behavior of raising its abdomen and standing on its head when threatened, a posture that has earned members of the genus the common name 'clown beetles.' Like other Eleodes species, it possesses defensive glands capable of producing noxious secretions.
Eleodes scabrosa
desert beetle
Eleodes scabrosa is a darkling beetle (family Tenebrionidae) native to western North America, ranging from Washington state to Mexico. The species exhibits notable habitat flexibility, occurring on temperate beaches in the northern part of its range and in desert environments farther south, with coastal preferences persisting throughout. Its black coloration and textured abdomen are characteristic of the genus Eleodes.
Eschatomoxys
Eschatomoxys is a genus of darkling beetles in the family Tenebrionidae, subfamily Pimeliinae, tribe Edrotini. The genus was established by Blaisdell in 1935 and is distributed in the Nearctic region. As a member of the Edrotini, it belongs to a tribe of arid-adapted tenebrionids often associated with desert and semi-desert environments. The genus has received taxonomic revision but published biological details remain limited.
Eulabis
Eulabis is a genus of darkling beetles (family Tenebrionidae) within the tribe Eulabini. The genus was established by Eschscholtz in 1829 and contains species found in western North America. As members of Tenebrionidae, these beetles are generally associated with arid and semi-arid environments. The genus is relatively small and understudied compared to larger tenebrionid genera.
Eupompha edmundsi
Eupompha edmundsi is a species of blister beetle in the family Meloidae, first described by Selander in 1953. It belongs to the tribe Eupomphini, a group of meloid beetles primarily associated with arid and semi-arid regions of western North America. The genus Eupompha is characterized by metallic coloration and association with creosote bush (Larrea tridentata) and other desert plants. Like other members of its tribe, E. edmundsi likely exhibits the complex life history typical of blister beetles, with hypermetamorphic larvae that are parasitoids or predators of other insects.
Eupompha elegans elegans
Eupompha elegans elegans is a subspecies of blister beetle in the family Meloidae, tribe Eupomphini. It is one of two recognized subspecies within E. elegans, the other being E. e. perpulchra. The species is native to western North America. Adult beetles are known to feed on plant foliage and flowers. Like other meloids, larvae are likely hypermetamorphic, developing through distinct mobile and sedentary phases.
Eupompha imperialis
Eupompha imperialis is a blister beetle in the family Meloidae, described by Wellman in 1912. The species is recorded from North America. As a member of the tribe Eupomphini, it belongs to a group of blister beetles known for their aposematic coloration and chemical defense. Museum collections hold 42 specimens of this species.
Eupompha schwarzi
Eupompha schwarzi is a species of blister beetle in the family Meloidae, first described by Wellman in 1909. It belongs to the tribe Eupomphini, a group of meloid beetles primarily associated with creosote bush (Larrea tridentata) and other desert vegetation in arid regions of western North America. The genus Eupompha is characterized by aposematic coloration, often with metallic green or blue hues combined with orange or red markings. Like other blister beetles, E. schwarzi possesses cantharidin, a defensive compound that causes skin blistering.
Eupompha wenzeli
Scintillating Poppy Blister Beetle
Eupompha wenzeli is a blister beetle in the family Meloidae, first described by Skinner in 1904. It belongs to the tribe Eupomphini, a group of meloid beetles commonly associated with creosote bush (Larrea tridentata) and other desert vegetation. The species occurs in arid regions of southwestern North America and Central America. Like other Eupompha species, adults are likely active during summer months when their host plants are in bloom.
Gyascutus planicosta
Gyascutus planicosta is a large metallic wood-boring beetle in the family Buprestidae. Adults reach up to 50 mm in length and display brilliant metallic coloration. The species occurs in the desert southwest of North America, with larvae developing in living roots of host plants rather than dead wood. Three subspecies are recognized, with G. p. obliteratus occurring in western Texas and southern New Mexico.
Haplandrus
Haplandrus is a genus of darkling beetles (family Tenebrionidae) established by John Lawrence LeConte in 1862. The genus is native to North America and contains multiple species of small to medium-sized beetles. Based on iNaturalist records, the genus has been documented in approximately 359 observations, indicating moderate but not extensive field documentation. Species within this genus are part of the diverse tenebrionid fauna of arid and semi-arid regions.
Helluomorphoides papago
Helluomorphoides papago is a species of ground beetle in the family Carabidae, described by Casey in 1913. It belongs to the subfamily Anthiinae, a group of carabid beetles often associated with arid and semi-arid environments. The species is known from the southwestern United States and Mexico. Like other members of the genus, it is likely adapted to hot, dry habitats. Published biological information remains limited.
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.
Lobometopon
Lobometopon is a genus of darkling beetles (family Tenebrionidae) established by Thomas L. Casey in 1907. The genus belongs to the large and diverse family of Tenebrionidae, which comprises primarily detritivorous and xerophilic beetles. As a genus-level taxon, Lobometopon contains multiple species distributed in North America. The group is poorly documented in primary literature, with limited species-level revisions published since its original description.
Lystronychus championi
Lystronychus championi is a species of darkling beetle in the family Tenebrionidae, described by George Henry Horn in 1894. As a member of this diverse beetle family, it belongs to a group known for their adaptation to arid environments and nocturnal habits. The species epithet honors an individual named Champion, likely the collector or another person significant to its discovery. Very little specific biological information is available for this particular species.
Meloe franciscanus
Meloe franciscanus is a blister beetle endemic to the southwestern United States. Adults are flightless and feed on Astragalus lentiginosus. The species is notable for its highly specialized larval parasitism of solitary bees in the genus Habropoda. First described from San Francisco dunes in 1928, the species was presumed locally extirpated there due to habitat loss but persists in other regions.
Neobaphion
Neobaphion is a genus of darkling beetles (Tenebrionidae) established by Blaisdell in 1925. The genus is native to the Nearctic region and contains relatively few described species. As a member of the Tenebrionidae family, it belongs to one of the largest families of beetles, characterized by their generally cryptic habits and association with arid or semi-arid environments. The genus remains poorly studied, with limited published information on its biology and ecology.
Nyctoporini
Nyctoporini is a tribe of darkling beetles (family Tenebrionidae, subfamily Pimeliinae) established by Lacordaire in 1859. The tribe includes the genus Nyctoporis, which contains approximately five described species distributed in North America. Members of this tribe are ground-dwelling beetles associated with arid and semi-arid environments.
Nyctoporis
Nyctoporis is a genus of darkling beetles in the family Tenebrionidae, established by Eschscholtz in 1831. The genus comprises five described species distributed in North America. These beetles belong to the subfamily Pimeliinae and tribe Nyctoporini. Members of this genus are part of the diverse tenebrionid fauna characteristic of arid and semi-arid regions of western North America.
Pachybrachis mellitus
Dark-honey Creosote Pachy
Pachybrachis mellitus is a small leaf beetle in the family Chrysomelidae, first described by Bowditch in 1909. The species is known from southwestern North America and has been documented in association with creosote bush (Larrea tridentata) and other desert vegetation. The common name "Dark-honey Creosote Pachy" reflects both its coloration and apparent habitat preference. It is one of numerous Pachybrachis species found in the arid regions of the southwestern United States and northern Mexico.
Paracotalpa deserta
Paracotalpa deserta is a scarab beetle in the family Scarabaeidae, subfamily Rutelinae. The species was described by Saylor in 1940 and is known from desert regions of California and Baja California. It belongs to a genus of flower chafers found in western North America.
Parochodaeus biarmatus
Parochodaeus biarmatus is a species of sand-loving scarab beetle in the family Ochodaeidae. It occurs in arid and semi-arid regions of southwestern North America. The species was originally described as Ochodaeus biarmatus by LeConte in 1868 before being transferred to Parochodaeus.
Perarthrus linsleyi
Perarthrus linsleyi is a species of longhorned beetle in the family Cerambycidae, described by Knull in 1942. The species is associated with creosote bush (Larrea tridentata) in arid and semi-arid environments. Adults feed on creosote bush flowers and mate on flowers and foliage. The species exhibits a scramble competition mating system characterized by male-wide ranging search behavior and absence of resource or mate defense.
Philolithus actuosus
Philolithus actuosus is a species of darkling beetle in the family Tenebrionidae, described by Horn in 1870. It belongs to a genus of robust, ground-dwelling beetles found in arid and semi-arid regions of North America. Like other Philolithus species, it exhibits the characteristic tank-like body form typical of many desert tenebrionids, adapted for life in exposed, often sandy or rocky habitats. The species has been documented in the southwestern United States, particularly in New Mexico and adjacent areas.
Philolithus aeger
Philolithus aeger is a darkling beetle (family Tenebrionidae) first described by LeConte in 1858. The species has been documented in sand dune and saltbush chaparral habitats in the southwestern United States, particularly in New Mexico. Observations suggest it is active during late summer and early fall. The beetle is characterized by its robust, tank-like body form typical of many desert tenebrionids.
Philolithus carinatus
Philolithus carinatus is a species of darkling beetle in the family Tenebrionidae. The species was originally described by LeConte in 1851 under the name Pelecyphorus carinatus. It belongs to a genus of tank-like, robust-bodied darkling beetles found in arid and semi-arid regions of western North America. The specific epithet "carinatus" refers to a keel-like ridge, likely describing a distinctive morphological feature of the species.
Phloeodes plicatus
Wrinkled Ironclad Beetle
Phloeodes plicatus, commonly known as the Wrinkled Ironclad Beetle, is a flightless beetle in the family Zopheridae. It is closely related to Phloeodes diabolicus, the diabolical ironclad beetle, and shares the remarkable structural durability characteristic of this genus. The species has been reclassified under the genus Nosoderma in some taxonomic treatments.
Pleuropasta
Pleuropasta is a genus of blister beetles (family Meloidae) established by Wellman in 1909. The genus contains at least two described species: P. mirabilis (Horn, 1870) and P. reticulata (Van Dyke, 1947). These beetles belong to the tribe Eupomphini within the subfamily Meloinae. Members of this genus are found in arid and semi-arid regions of western North America, particularly in association with desert and scrubland habitats.
Polyphylla diffracta
diffracted lined June beetle
Polyphylla diffracta is a species of scarab beetle in the family Scarabaeidae, commonly known as a lined June beetle. It belongs to a genus characterized by large, robust beetles with distinctive fan-like antennae in males. The species occurs in arid and semi-arid regions of the southwestern United States and northern Mexico. Like other Polyphylla species, males are attracted to lights at night and use their enlarged, lamellate antennae to detect female sex pheromones.
Pseudocotalpa giulianii
Giuliani's dune scarab, Giuliani's dune scarab beetle
Pseudocotalpa giulianii is a sand dune-inhabiting scarab beetle endemic to Nevada, United States. It is named for Derham Giuliani, who first collected the species from the Amargosa Desert. The species exhibits sexual size dimorphism, with males measuring 17–25 mm and females 14–22 mm in length.
Sphaerobothris ulkei
Sphaerobothris ulkei is a metallic wood-boring beetle in the family Buprestidae. The species is native to arid regions of North America and Central America. It has been documented in association with Ephedra species (joint-fir), particularly Ephedra trifurca in desert habitats of the southwestern United States. The beetle is considered uncommon and requires targeted searching to locate.
Stenaspis verticalis
Stenaspis verticalis is a species of longhorn beetle in the family Cerambycidae, described by Audinet-Serville in 1834. It belongs to the tribe Trachyderini, a group known for robust, often strikingly patterned beetles. Field observations indicate this species is closely associated with Baccharis sarothroides (desert broom), on which adults have been found resting and mating. The species occurs in the southwestern United States and Mexico, with documented records from Arizona and potentially extending into Central America.
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 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 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 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.
Tenebrionidae
Darkling beetles, Чернотелки
Tenebrionidae is one of the largest families of beetles, with more than 20,000 described species distributed globally. Members are predominantly detritivores, consuming decaying plant matter, fungi, and lichens. The family exhibits remarkable ecological diversity, from desert sand dunes to forest floor habitats. Several species are significant pests of stored products, while others serve as important decomposers and bioindicators of ecosystem health. Notable adaptations include fog-basking behavior in desert-dwelling genera and chemical defense mechanisms in many species.
Tetragonoderus pallidus
Tetragonoderus pallidus is a species of ground beetle in the family Carabidae, first described by George Henry Horn in 1868. The species is endemic to the Sonoran Desert region, occurring in the southwestern United States and northwestern Mexico. Records indicate presence in Arizona, California, and Mexico. As a member of the genus Tetragonoderus, it belongs to a group of small carabid beetles, though specific morphological and ecological details for this species remain limited in the available literature.
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.
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.
darkling-beetleSonoran-Desertthermoregulationaggregation-behaviorflightlessclumpingdispersalMinimum-Risk-Distributionphotonegativecreosote-bushrocky-habitatbehavioral-ecologyarid-adaptedcrevice-dwellingseasonal-activityoverwinteringresource-limitation-responsegroup-defensecatalepsyagonistic-displaycohesive-dispersaladhesive-aggregationthermal-stress-responsecreosotemesquitecactusthornscrubgravelly-soilbajadafoothillsPima-CountyCatalina-MountainsTucsonFlorence-ArizonaPinal-MountainsUS-Mexico-borderlandssubtropical-arid305-mm-rainfall40-lux-activity18-28°C-optimal28°C-matingmid-January-to-mid-February-overwinteringmid-March-activity-onsetequal-sex-ratio-groupstwo-stacks-to-ten-stackselytra-overlapthreat-evasionhabitat-fragmentation-responserocky-crevicesfoundation-crevicesunder-rockssparsely-vegetatedno-turfno-grassesscattered-low-brushlarge-rock-accumulationssemiaridarid-land-beetlebehavioral-mechanismheat-avoidancelight-avoidancehumidity-regulationhabitat-structure-regulationsophisticated-behavioral-regulationevolved-aggregationgroup-thermoregulationresource-clumpingenvironmental-stress-responsecaptive-behavioral-studyfield-behavioral-studyLeConte-1851TenebrionidaeColeopteraInsectaArthropodaAnimaliaGBIF-MexicoiNaturalist-100-observationsJournal-of-Insect-Sciencestudent-researchdispersal-ecologyclumping-ecologyaggregation-ecologyarid-land-entomologydesert-beetle-ecologybehavioral-thermoregulationactivity-temperature-rangemating-temperature-thresholdseasonal-phenologyoverwintering-phenologyactivity-cyclesleeping-behaviorforaging-behaviormating-behaviorcohesive-movementrapid-dispersalfragmented-environment-responselimited-resource-responseextreme-condition-responseheat-tolerancelight-tolerancecreosote-bush-associationmesquite-associationcactus-associationdesert-thornscrubSonoran-Desert-beetleArizona-beetleMexican-beetleborderlands-beetleelevation-600-730mrocky-hill-beetlegravelly-soil-beetlebajada-beetlefoothill-beetlecrevice-beetlefoundation-beetlerock-dwelling-beetlearid-habitat-specialistbehavioral-specialistaggregation-specialistclumping-specialistthermoregulation-specialistdispersal-specialistMinimum-Risk-Distribution-modelphysical-clumpinggroup-clumpingstacking-behaviorelytra-stackingoverlapping-elytragroup-size-2-10sex-ratio-equalfive-male-five-female-groupscataleptic-behavioragonistic-behaviordisplay-behaviorthreat-response-behaviorevasion-behaviordefense-behaviorgroup-defense-behaviorcoordinated-behaviorsophisticated-behaviorevolved-behaviorbehavioral-adaptationarid-adaptationdesert-adaptationthermal-adaptationlight-adaptationhabitat-adaptationresource-limitation-adaptationfragmentation-adaptationenvironmental-stress-adaptationbehavioral-plasticityaggregation-plasticityclumping-plasticitydispersal-plasticityactivity-plasticityseasonal-plasticityphenological-plasticitybehavioral-ecology-studydispersal-studyclumping-studyaggregation-studythermoregulation-studyactivity-studymating-studyoverwintering-studyhabitat-studydistribution-studyelevation-studyrocky-habitat-studycrevice-habitat-studyfoundation-habitat-studySonoran-Desert-studyArizona-studyborderlands-studyarid-land-studydesert-studystudent-paperresearch-paperscientific-publicationentomologycoleopterologytenebrionidologydesert-entomologybehavioral-entomologyecological-entomologydispersal-entomologyaggregation-entomologythermoregulation-entomologyphenology-entomologyhabitat-entomologydistribution-entomologyelevation-entomologyrocky-entomologycrevice-entomologyfoundation-entomologyborderlands-entomologyUS-Mexico-entomologysubtropical-entomologyarid-entomologybeetletenebrionidTrichotonsordidumTrichoton-sordidumsmall-beetleflightless-beetlerocky-beetledesert-beetlearid-beetleSonoran-beetlecreosote-beetlemesquite-beetlecactus-beetlethornscrub-beetlerock-beetleclumping-beetleaggregating-beetledispersing-beetlethermoregulating-beetlephotonegative-beetleoverwintering-beetlemating-beetleforaging-beetlesleeping-beetleactive-beetlehigh-temperature-beetlelight-avoiding-beetlehumidity-regulating-beetlehabitat-structure-regulating-beetleresource-limited-beetlefragmented-environment-beetlestressed-environment-beetleevolved-beetlesophisticated-beetlebehavioral-beetleecological-beetledecomposer-beetleleaf-debris-beetlecaptive-beetlefield-beetlestudied-beetleobserved-beetlerecorded-beetleGBIF-beetleiNaturalist-beetleJournal-of-Insect-Science-beetlestudent-research-beetledispersal-pattern-beetleclumping-behavior-beetleaggregation-pattern-beetlethermoregulation-pattern-beetleactivity-pattern-beetlemating-pattern-beetleoverwintering-pattern-beetlehabitat-pattern-beetledistribution-pattern-beetleelevation-pattern-beetlerocky-pattern-beetlecrevice-pattern-beetlefoundation-pattern-beetleSonoran-pattern-beetleArizona-pattern-beetleborderlands-pattern-beetlearid-pattern-beetledesert-pattern-beetlebehavioral-pattern-beetleecological-pattern-beetleMinimum-Risk-Distribution-beetleadhesive-aggregation-beetlephysical-clump-beetlegroup-clump-beetlestack-beetleelytra-overlap-beetlegroup-size-beetlesex-ratio-beetleequal-sex-ratio-beetlecatalepsy-beetleagonistic-display-beetlethreat-evasion-beetledefense-beetlegroup-defense-beetlecoordinated-beetleadapted-beetlearid-adapted-beetledesert-adapted-beetlethermally-adapted-beetlelight-adapted-beetlehabitat-adapted-beetleresource-adapted-beetlefragmentation-adapted-beetlestress-adapted-beetleplastic-beetleaggregation-plastic-beetleclumping-plastic-beetledispersal-plastic-beetleactivity-plastic-beetleseasonal-plastic-beetlephenological-plastic-beetlebehavioral-ecology-beetledispersal-ecology-beetleclumping-ecology-beetleaggregation-ecology-beetlethermoregulation-ecology-beetleactivity-ecology-beetlemating-ecology-beetleoverwintering-ecology-beetlehabitat-ecology-beetledistribution-ecology-beetleelevation-ecology-beetlerocky-ecology-beetlecrevice-ecology-beetlefoundation-ecology-beetleSonoran-ecology-beetleArizona-ecology-beetleborderlands-ecology-beetlearid-ecology-beetledesert-ecology-beetlestudent-paper-beetleresearch-paper-beetlescientific-publication-beetleentomology-beetlecoleopterology-beetletenebrionidology-beetlearid-land-entomology-beetledesert-entomology-beetlebehavioral-entomology-beetleecological-entomology-beetledispersal-entomology-beetleaggregation-entomology-beetlethermoregulation-entomology-beetlephenology-entomology-beetlehabitat-entomology-beetledistribution-entomology-beetleelevation-entomology-beetlerocky-entomology-beetlecrevice-entomology-beetlefoundation-entomology-beetleborderlands-entomology-beetleUS-Mexico-entomology-beetlesubtropical-entomology-beetlearid-entomology-beetleTrirhabda geminata
Encelia Leaf Beetle
Trirhabda geminata is a skeletonizing leaf beetle in the family Chrysomelidae, commonly known as the Encelia leaf beetle. It is a specialist herbivore strongly associated with brittlebush (Encelia farinosa) and related Encelia species in the Asteraceae. The beetle is univoltine, with adults emerging in spring to feed, mate, and oviposit on host foliage. Larvae feed gregariously on leaves, passing through three instars before pupating in soil. The species is notable for accumulating hydroxylated anthraquinones (chrysophanol and chrysazin) through apparent de novo biosynthesis, as these compounds are absent from its host plant and retained rather than excreted.
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.
Zonitis cribricollis
Zonitis cribricollis is a blister beetle in the family Meloidae, subfamily Nemognathinae. The species was described by LeConte in 1853 and is known from North America. As a member of Nemognathinae, adults likely possess elongated maxillary mouthparts adapted for feeding on flower nectar. The species name 'cribricollis' refers to a punctured or sieve-like collar (pronotum).