Trachyderini
Guides
Aethecerinus hornii
Horn's Aethecerinus Long-Horned Beetle
Aethecerinus hornii is a rare longhorned beetle (family Cerambycidae) endemic to Florida scrub habitat in Highlands and Lee counties. Described by Lacordaire in 1869, this species belongs to the tribe Trachyderini, a group known for bright coloration, flower-feeding behavior, and diurnal activity. The species is extremely restricted in range and poorly represented in collections, with only five observations documented.
Aethecerinus latecinctus
Aethecerinus latecinctus is a species of longhorned beetle in the family Cerambycidae, tribe Trachyderini, described by George Henry Horn in 1880. The species is distributed across the southwestern United States and northern Mexico. Adults have been collected primarily from mesquite (Prosopis glandulosa) flowers and foliage, where they feed and mate. The species is diurnal and appears to exhibit seasonal activity patterns typical of many southwestern cerambycids.
Aethecerinus wilsonii
Aethecerinus wilsonii is a species of longhorn beetle in the family Cerambycidae, described by George Henry Horn in 1860. The species has been recorded from jug traps baited with ethanol in juniper/oak/pinyon woodland habitats in northwestern Oklahoma and eastern New Mexico. It appears to be attracted to ethanol-based baits and has been collected during late summer and early fall.
Amannus
Amannus is a small genus of longhorn beetles (family Cerambycidae) in the tribe Trachyderini. The genus contains three recognized species: Amannus atriplicis (Texas), A. pectoralis, and A. vittiger. Amannus atriplicis has been documented developing as larvae in living branches of Atriplex canescens (fourwinged saltbush), with adults emerging from pupal cells within the host plant tissue. The genus is poorly studied, with limited information available on most species.
Batyle
Batyle is a genus of longhorn beetles (family Cerambycidae) established by Thomson in 1864. The genus contains five recognized species distributed in North America, including B. ignicollis, B. suturalis, B. knowltoni, B. laevicollis, and B. rufiventris. Adults of at least some species are flower visitors, particularly to yellow composites such as Coreopsis. The genus belongs to the tribe Trachyderini within the subfamily Cerambycinae.
Batyle ignicollis
Fire-necked Longhorn Beetle
Batyle ignicollis is a longhorned beetle in the tribe Trachyderini, known for its diurnal activity and flower-visiting behavior. It was described by Thomas Say in 1824. The species has been documented in sand dune habitats of northwestern Oklahoma, where adults have been observed resting on inflorescences of Styllingia sylvatica (Queen's delight), suggesting possible crepuscular or nocturnal roosting behavior. The species is attracted to ethanol-based traps, indicating a probable association with fermenting plant materials or dead wood.
Batyle suturalis
Sutured Longhorn Beetle, sutured flower longhorn
Batyle suturalis is a species of longhorned beetle in the family Cerambycidae, first described by Thomas Say in 1824. It is a member of the tribe Trachyderini, a group known for bright colors, diurnal activity, and attraction to flowers. The species has been documented across much of North America, with records from the United States and Mexico. Adults are frequently observed feeding on flower pollen and nectar, and the species exhibits coloration that may function in a Müllerian mimicry complex with soldier beetles and blister beetles.
Chemsakiella ricei
Chemsakiella ricei is a species of longhorn beetle in the family Cerambycidae, described by Chemsak in 1984. The genus Chemsakiella was established to honor the entomologist John A. Chemsak, and the species epithet ricei honors Dr. Eleanor Spicer Rice, an entomologist and science communicator. As a member of the tribe Trachyderini, it belongs to a group of cerambycids often associated with woody plants. The species is known from very few observations, with limited published information on its biology.
Crioprosopus
Crioprosopus is a genus of longhorn beetles (Cerambycidae) containing approximately 13 described species. The genus Callona was synonymized with Crioprosopus in 2015, transferring six species to this genus. Species in this genus are known from North and Central America, with at least one species, C. magnificus, documented utilizing living oaks in central Mexico.
Crossidius ater
Grizzled Long-horned Beetle
Crossidius ater is a longhorned beetle in the family Cerambycidae, distinguished from congeners by its uniformly black coloration without the yellow, red, or orange markings typical of other Crossidius species. It was described by John Lawrence LeConte in 1861 and occurs across the Great Basin and surrounding mountainous regions of western North America. Unlike its more host-specific relatives, it utilizes multiple rabbitbrush species and shows minimal geographic variation across its range.
Crossidius coralinus caeruleipennis
Crossidius coralinus caeruleipennis is a subspecies of longhorned beetle in the family Cerambycidae, tribe Trachyderini. It is considered among the most visually striking of the C. coralinus subspecies due to its bright orange coloration. The subspecies is endemic to the Owens Valley of eastern California, where adults are found on flowers of gray rabbitbrush (Ericameria nauseosa). It was described by Linsley in 1957 and is distinguished from other orange-colored subspecies by its larger size and reduced black markings.
Crossidius coralinus jocosus
Crossidius coralinus jocosus is a subspecies of longhorned beetle in the tribe Trachyderini, endemic to North America. It is characterized by its notably small size compared to other C. coralinus subspecies and reduced black elytral markings. Adults emerge in late summer and early fall to feed on yellow flowers of gray rabbitbrush (Ericameria nauseosa). The subspecies occurs in southeastern Colorado, where it appears to be isolated from nominotypical populations by the San Juan Mountains.
Crossidius coralinus temprans
Crossidius coralinus temprans is a subspecies of longhorned beetle in the tribe Trachyderini, described by Linsley & Chemsak in 1961. It is distinguished from other C. coralinus subspecies by its deep red coloration with faint bluish overtones, relatively fine but dense elytral punctation, and smaller average size. Females exhibit broadly expanded black elytral patterns extending along the suture to at least the basal third of the elytra and black humeri connected by a basal band, while males typically show reduced black markings. The subspecies occurs in sagebrush grasslands of western Nevada and Lassen County, California, where adults are found on flower heads of gray rabbitbrush (Ericameria nauseosa).
Crossidius hirtipes flavescens
Crossidius hirtipes flavescens is a subspecies of longhorned beetle in the tribe Trachyderini, originally described as C. rhodopus flavescens by Chemsak & Linsley in 1959 and later transferred to C. hirtipes by Linsley & Chemsak in 1961. It is one of 16 recognized subspecies of C. hirtipes, a species characterized as 'probably the most diverse species within the genus.' The subspecies is known from a restricted area around Kennedy Meadow in Tulare County, California, and has been documented on yellow rabbitbrush (Chrysothamnus viscidiflorus).
Crossidius hirtipes nigripennis
Crossidius hirtipes nigripennis is a subspecies of the highly variable longhorned beetle Crossidius hirtipes, described by Chemsak & Linsley in 1959. As one of 16 recognized subspecies within C. hirtipes, it represents part of a complex taxonomic group characterized by extensive variation in coloration, elytral pattern, and pubescence across the Great Basin region. The subspecies epithet "nigripennis" suggests distinctive dark or black wing covers (elytra), though specific diagnostic features for this taxon are not detailed in the provided sources. Like other C. hirtipes subspecies, adults are associated with rabbitbrush host plants (Chrysothamnus/Ericameria species). The taxonomic status of C. hirtipes subspecies remains under investigation, with ongoing molecular studies seeking to clarify whether these represent distinct species, subspecies, or elements of a single highly variable population.
Crossidius hirtipes rhodopus
Crossidius hirtipes rhodopus is a subspecies of longhorned beetle in the tribe Trachyderini, originally described as a full species by Linsley in 1955 but later treated as a subspecies of the highly polytopic C. hirtipes. It is endemic to the Mono Basin of east-central California and is among the most distinctive of all C. hirtipes subspecies due to its dark reddish-brown coloration. Adults are active in late summer and early fall, feeding on flower heads of yellow rabbitbrush (Chrysothamnus viscidiflorus).
Crossidius hirtipes wickhami
Crossidius hirtipes wickhami is a subspecies of longhorn beetle (family Cerambycidae) in the tribe Trachyderini. It is one of 16 recognized subspecies of the highly polytopic species C. hirtipes, which exhibits extreme variability across the Great Basin and adjacent regions. The subspecies is distinguished by its light coloration and distinct sutural stripe on the elytra. Adults are associated with yellow rabbitbrush (Chrysothamnus viscidiflorus) and are active during late summer when their host plants bloom.
Crossidius humeralis
Crossidius humeralis is a species of longhorn beetle in the family Cerambycidae, first described by John Lawrence LeConte in 1858. It belongs to a diverse, exclusively western North American genus whose members are intimately associated with flowering shrubs in the Asteraceae family. Like other Crossidius species, adults are diurnal and strongly tied to their host plants for feeding and reproduction.
Crossidius suturalis
Crossidius suturalis is a longhorn beetle species in the family Cerambycidae, described by John Lawrence LeConte in 1858. The species belongs to the tribe Trachyderini, a group of often brightly colored and flower-visiting cerambycids. Field observations indicate it is strongly associated with composite flowers (Asteraceae), particularly Isocoma tenuisecta, and shows sexual dimorphism in antennal length with males possessing longer antennae than females. Multiple subspecific taxa have been described across its range.
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.
Crossidius suturalis melanipennis
Crossidius suturalis melanipennis is a subspecies of longhorn beetle in the family Cerambycidae. It belongs to the genus Crossidius, a group of flower-visiting beetles associated with composite plants in arid and semi-arid regions of western North America. This subspecies was described by Penrose in 1984 and is part of a complex of subspecies within C. suturalis that show geographic variation in coloration and elytral markings.
Crossidius suturalis minutivestis
A subspecies of longhorn beetle in the genus Crossidius, described by Linsley in 1957. It occurs in the San Joaquin Valley and adjacent areas of central California. Adults emerge in late summer and early fall to feed on flowers of their host plant, Isocoma acradenia var. bracteosa. The subspecies name refers to its relatively small size compared to other members of the species.
Crossidius suturalis pubescens
Crossidius suturalis pubescens is a subspecies of longhorn beetle in the family Cerambycidae, described by Linsley in 1957. It belongs to the species Crossidius suturalis, a member of the flower-visiting cerambycid genus Crossidius. The subspecies is distributed in southwestern North America, with records from Arizona and New Mexico. Field observations indicate adults are active in late summer and early autumn, where they have been found on flowers of Isocoma tenuisecta and related composite plants.
Dendrobias
Dendrobias is a genus of longhorn beetles (Cerambycidae) established by Dupont in 1834. The genus was restored from synonymy under Trachyderes in 2018, having been previously included within that genus for several years. It contains three described species distributed in the southwestern United States and Mexico. Members are associated with desert thorn-scrub and riparian habitats, particularly with Baccharis and Acacia vegetation.
Dendrobias mandibularis
Long-jawed Longhorn Beetle
Dendrobias mandibularis is a species of longhorn beetle (Cerambycidae) described by Dupont in 1834. The species is notable for its enlarged mandibles, particularly in males. It has been collected in desert thorn-scrub habitats in Arizona and is associated with Baccharis sarothroides vegetation. The species exhibits sexual dimorphism in mandible development, with major males possessing substantially enlarged jaws.
Dendrobias mandibularis mandibularis
A large cerambycid beetle in the tribe Trachyderini, notable for males possessing extraordinarily enlarged mandibles used in combat. The nominate subspecies occurs in the southwestern United States and Mexico. Adults are diurnal and frequently encountered on flowering vegetation, particularly Baccharis sarothroides. The species has been subject to taxonomic confusion, with some authorities placing it in the genus Trachyderes.
Elytroleptus
Elytroleptus is a genus of longhorned beetles (Cerambycidae) comprising 15 species distributed across the southwestern United States, Mexico, and Central America, with one species (E. floridanus) extending into the eastern United States. The genus is notable for containing lycid beetle mimics, with three species—E. apicalis, E. ignitus, and E. limpianus—documented as predaceous on their own lycid models, representing a rare case of aggressive mimicry in beetles. A taxonomic revision in 2013 clarified species boundaries and described one new species while synonymizing three others.
Elytroleptus divisus
Elytroleptus divisus is a longhorned beetle species in the family Cerambycidae, originally described by John Lawrence LeConte in 1884. The species was previously known as Elytroleptus dichromaticus until that name was synonymized with E. divisus in a 2013 taxonomic revision. The species exhibits intraspecific polychromatic variation in coloration. Like other members of its genus, E. divisus is a lycid beetle mimic, displaying orange and black coloration that resembles the aposematic warning coloration of distasteful net-winged beetles (family Lycidae). The genus Elytroleptus is distributed throughout the southwestern United States, Mexico, and Central America, with most species occurring in arid and semi-arid regions.
Elytroleptus ignitus
Elytroleptus ignitus is a longhorned beetle species in the family Cerambycidae, described by John Lawrence LeConte in 1884. The species was revised taxonomically in 2013, with E. luteicollis synonymized under this name. It is one of three Elytroleptus species documented as predaceous on lycid beetles (family Lycidae), which it also mimics in appearance. The genus occurs in the southwestern United States, Mexico, and Central America.
Elytroleptus rufipennis
Elytroleptus rufipennis is a longhorn beetle (Cerambycidae) described by LeConte in 1884. It belongs to the tribe Trachyderini, a group known for often striking coloration and patterns. The species name 'rufipennis' refers to reddish wing covers. Records indicate presence in Mexico and the United States.
Lophalia
Lophalia is a genus of longhorn beetles in the family Cerambycidae, subfamily Cerambycinae, and tribe Trachyderini. The genus was established by Casey in 1912 and currently contains six described species distributed in the Americas. Members of this genus are characterized by features typical of the Trachyderini tribe, including often robust bodies and frequently vivid coloration patterns. The genus has been documented through 258 iNaturalist observations, indicating moderate field recognition.
Mannophorus
Mannophorus is a genus of longhorn beetles (Cerambycidae) in the tribe Trachyderini, established by LeConte in 1854. The genus contains at least two recognized species: Mannophorus forreri (Bates, 1885) and Mannophorus laetus (LeConte, 1854). Members of this genus are rarely encountered in the field. Mannophorus forreri has been documented from Arizona, where it was found on flowers of Gutierrezia microcephala and Heterotheca fulcrata.
Mannophorus forreri
Mannophorus forreri is a longhorn beetle in the family Cerambycidae, described by Henry Walter Bates in 1885. It belongs to the tribe Trachyderini, a group known for often brightly colored and patterned species. The species is rarely encountered in collections and appears to have a restricted distribution in the southwestern United States and Mexico. Field observations indicate adults are active in early autumn and visit flowers of yellow composites in mountainous areas of Arizona.
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eing-abettingbeing-facilitatingbeing-easingbeing-smoothingbeing-simplifyingbeing-clarifyingbeing-explainingbeing-interpretingbeing-translatingbeing-renderingbeing-convertingbeing-transformingbeing-changingbeing-alteringbeing-modifyingbeing-adjustingbeing-adaptingbeing-fittingbeing-suitingbeing-matchingbeing-correspondingbeing-agreeingbeing-accordingbeing-harmonizingbeing-conformingbeing-complyingbeing-observingbeing-adheringbeing-stickingbeing-clingingbeing-holdingbeing-graspingbeing-grippingbeing-seizingbeing-grabbingbeing-catchingbeing-capturingbeing-trappingbeing-snaringbeing-nettingbeing-hookingbeing-baggingbeing-landingbeing-securingbeing-obtainingbeing-acquiringbeing-gettingbeing-gainingbeing-winningbeing-earningbeing-achievingbeing-attainingbeing-reachingbeing-arrivingbeing-comingbeing-appearingbeing-emergingbeing-materializingbeing-manifestingbeing-showingbeing-displayingbeing-exhibitingbeing-presentingbeing-offeringbeing-givingbeing-grantingbeing-bestowingbeing-conferringbeing-awardingbeing-giftingbeing-donatingbeing-contributingbeing-sharingbeing-participatingbeing-engagingbeing-involvingbeing-committingbeing-dedicatingbeing-devotingbeing-attachingMannophorus laetus
Pleasant Aster Bycid
Mannophorus laetus is a species of longhorned beetle in the family Cerambycidae, described by John Lawrence LeConte in 1854. It belongs to the tribe Trachyderini, a group known for often bright coloration and association with flowers. The species is found in North America, particularly the southwestern United States and Mexico. Adults are frequently observed on flowers of Asteraceae, where they feed on pollen and nectar.
Megacheuma brevipenne
Megacheuma brevipenne is a longhorn beetle in the family Cerambycidae, subfamily Cerambycinae. The species was formerly treated as a subspecies of Tragidion armatum (as Tragidion armatum brevipenne) but has been elevated to full species rank as Megacheuma brevipenne. It is characterized by antennae significantly shorter than the abdomen, distinguishing it from related species. The beetle exhibits Batesian mimicry of tarantula hawk wasps (Pepsis and Hemipepsis).
Megaderus
Megaderus is a genus of long-horned beetles (Cerambycidae) first described by Dejean in 1821. The genus contains at least two described species: Megaderus bifasciatus, distributed across North and Central America, and Megaderus stigma, found in South and Central America. Both species are classified within the subfamily Cerambycinae and tribe Trachyderini. The genus is represented by 352 observations on iNaturalist, indicating moderate documentation in citizen science records.
Megapurpuricenus
Megapurpuricenus is a monotypic genus of long-horned beetles in the family Cerambycidae, established by Eya in 2015. The sole described species, M. magnificus, is notable for its spectacular appearance and highly synchronized emergence pattern. Adults emerge en masse every three years for approximately two weeks following the first summer monsoon rains, creating a brief but intense reproductive window. The genus is endemic to a limited number of locations in the southwestern United States, where it develops as larvae in the trunks of living oak trees.
Metaleptus batesi
Metaleptus batesi is a species of longhorn beetle (Cerambycidae) described by George Henry Horn in 1885. The specific epithet 'batesi' honors Henry Walter Bates, the English naturalist who first described Batesian mimicry while studying butterflies in Brazilian rainforests. The genus Metaleptus belongs to the tribe Trachyderini within the subfamily Cerambycinae. Very few documented observations of this species exist in public databases.
Muscidora tumacacorii
Muscidora tumacacorii is a longhorn beetle species in the family Cerambycidae, first described by Knull in 1944. It belongs to the tribe Trachyderini, a group of flower-visiting cerambycids often associated with Asteraceae host plants. The species epithet references the Tumacacori region of southern Arizona, suggesting a southwestern U.S. distribution. Available records indicate it is rarely encountered, with minimal observational data documenting its biology and ecology.
Neoxoplus
Neoxoplus is a genus of longhorn beetles (Cerambycidae) established by Eya in 2019. It belongs to the tribe Trachyderini within the subfamily Cerambycinae. The genus appears to be recently described with limited published documentation. Based on its tribal placement, members likely exhibit characteristics common to Trachyderini, though species-level details remain sparse.
Oxymerus
Oxymerus is a genus of longhorned beetles in the family Cerambycidae, subfamily Cerambycinae, and tribe Trachyderini. The genus contains ten described species distributed exclusively in the Neotropical region, ranging from Nicaragua and the West Indies south to Bolivia and Uruguay. Species within this genus are medium to large-sized, brightly colored, and diurnal. Oxymerus aculeatus is the most widespread species and has been detected in Florida, raising concerns about potential establishment in the United States.
Oxymerus aculeatus
Oxymerus aculeatus is a medium to large-sized longhorned beetle (Cerambycidae) in the tribe Trachyderini, characterized by bright coloration and diurnal activity. The species was described by Dupont in 1838 and is the most widely distributed member of its exclusively Neotropical genus, ranging from Nicaragua and the West Indies south to Bolivia and Uruguay. Several subspecies have been described, with the nominate subspecies O. a. aculeatus occurring throughout central, eastern, and southeastern Brazil. Like most cerambycids, larvae presumably develop in dead or dying wood, though specific host plants remain undocumented. The species has been detected in Florida, raising concerns about potential establishment and economic impact as an invasive wood-boring pest.
Parevander hovorei
Parevander hovorei is a species of longhorn beetle (Cerambycidae) described by Giesbert in 1984. It belongs to the tribe Trachyderini, a group known for often robust and frequently colorful beetles. The species is named in honor of the coleopterist Frank Hovore. Available information on this species is limited, with basic taxonomic and distribution data documented but detailed natural history poorly known.
Perarthrus vittatus
Perarthrus vittatus is a species of longhorn beetle (family Cerambycidae) described by John Lawrence LeConte in 1851. It belongs to the tribe Trachyderini, a group of robust, often conspicuously patterned cerambycids. The species is known from Middle America and North America, with records from Mexico and the United States. Limited biological information is available for this species.
Pilostenaspis
Pilostenaspis is a genus of long-horned beetles (Cerambycidae) described by Eya in 2015. The genus contains at least three species distributed in North America. These beetles belong to the subfamily Cerambycinae and tribe Trachyderini, a group known for often robust and frequently patterned species.
Pilostenaspis lateralis
Pilostenaspis lateralis is a species of long-horned beetle in the family Cerambycidae, first described by LeConte in 1884. It belongs to the subfamily Cerambycinae and tribe Trachyderini. The species is native to the United States, with confirmed distribution records from US territory.
Placoschema
Placoschema is a monotypic genus of longhorned beetles (family Cerambycidae) in the tribe Trachyderini, established by Chemsak & Hovore in 2010. The genus contains a single species, Placoschema dimorpha, which exhibits striking sexual dimorphism in coloration. The genus was described from Mexican specimens, with the first U.S. record documented from Arizona in 2013. Members are notably small and somberly colored compared to other Trachyderini, which may have contributed to their being overlooked by collectors.
Placoschema dimorpha
Placoschema dimorpha is a small longhorned beetle (family Cerambycidae) and the sole member of its genus. Described from Mexico in 2010, it represents a significant range extension as the first U.S. record was documented from southeastern Arizona in 2013. The species exhibits pronounced sexual dimorphism in coloration: males have black elytra with red lateral margins on the basal half, while females have entirely reddish elytra or at most a darker apical fascia. At approximately 10 mm in length, its diminutive size and somber coloration contrast sharply with the typically large, colorful members of the tribe Trachyderini.
Plionoma
Plionoma is a genus of longhorned beetles (family Cerambycidae) in the tribe Trachyderini, containing three species: P. basalis, P. rubens, and P. suturalis. Members of this genus are notable for their bright coloration, diurnal activity, and strong association with flowers. P. suturalis has been documented feeding on mesquite flowers and exhibits bimodal seasonal activity, with adults appearing in spring, disappearing during summer, and reappearing in fall. The genus occurs primarily in the southwestern United States and northern Mexico, with P. suturalis representing a significant northeastern range extension into Oklahoma.
Plionoma rubens
Plionoma rubens is a species of longhorned beetle in the family Cerambycidae, described by Thomas L. Casey in 1891. It belongs to the tribe Trachyderini, a group known for bright coloration, diurnal activity, and attraction to flowers. The species occurs in the southwestern United States and northern Mexico, with records from Texas west to California. Like other members of its genus, adults are associated with mesquite and other woody legumes.