Beetles
Guides
Adephaga
Ground and Water Beetles, adephagans
Adephaga is the second-largest suborder of beetles, comprising over 40,000 species across 10 families. The suborder includes ground beetles (Carabidae), tiger beetles, predaceous diving beetles, and whirligig beetles. Members are characterized by specialized anatomical features including visible notopleural sutures and a first abdominal sternum separated by hind coxae. The vast majority of species belong to the family Carabidae.
Airaphilus
Airaphilus is a genus of beetles in the family Silvanidae, subfamily Silvaninae. The genus contains approximately 30 described species distributed across Europe, North Africa, Madagascar, and Japan. At least one species, Airaphilus abei, is flightless (apterous) and has been assessed as potentially endangered due to habitat loss. The genus was first described by Redtenbacher in 1858.
Apalonia
Apalonia is a genus of rove beetles in the family Staphylinidae, established by Casey in 1906. The genus contains at least 40 described species, placing it among the more species-rich genera within the aleocharine rove beetles. These beetles belong to the tribe Athetini, a large and diverse group characterized by small body size and complex morphological features. The genus has been documented in entomological collections, though detailed biological studies remain limited for most species.
Aplastini
Aplastini is a tribe of click beetles (Elateridae) within the order Coleoptera. Members of this tribe are characterized by morphological features that distinguish them from other elaterid tribes, though detailed biological information remains limited. The tribe contains relatively few described species compared to larger elaterid tribes. Observations suggest they occupy diverse terrestrial habitats across their range.
Apostasimerini
flower weevils
Apostasimerini is a large tribe of weevils within the family Curculionidae, commonly referred to as flower weevils. The tribe contains substantial diversity, with estimates ranging from 30+ genera and 70+ species to over 240 genera and nearly 1700 described species depending on taxonomic interpretation. Members are associated with flowering plants, though specific ecological relationships vary across the tribe. The group has been documented across multiple continents with notable representation in North America.
Archeocrypticidae
cryptic fungus beetles, Ancient Fungus Beetle
Archeocrypticidae is a small family of beetles comprising approximately 10 genera and 50 species worldwide. Commonly referred to as cryptic fungus beetles, members of this family are saprophagous, with adults and larvae typically found in plant litter and associated with fungal substrates. The family exhibits a predominantly pantropical distribution, with notable diversity in Australia and relative absence from temperate Palearctic and Nearctic regions.
Autalia
Autalia is a genus of rove beetles in the family Staphylinidae, first described by Leach in 1819. The genus belongs to the subfamily Aleocharinae and is the type genus of the tribe Autaliini. Species are documented from Europe, Northern America, and the Neotropics. The genus includes at least four recognized species: Autalia impressa, A. longicornis, A. puncticollis, and A. rivularis.
Bactridium
root-eating beetles
Bactridium is a genus of beetles in the family Monotomidae, commonly referred to as root-eating beetles. The genus contains approximately 18 described species. These beetles belong to the order Coleoptera and are part of a family characterized by small size and association with decaying organic matter.
Belonuchus
Belonuchus is a genus of large rove beetles in the family Staphylinidae, comprising more than 30 described species. Members of this genus are found in the Americas, with records from Mexico and the southwestern United States. At least one species, B. cifuentesi, has been documented in association with Agave plants. The genus is characterized by features typical of the tribe Staphylinini within the subfamily Staphylininae.
Bembidion dejectum
Bembidion pseudocautum
Pseudocautum Bembidion Beetle
Bembidion pseudocautum is a ground beetle species in the family Carabidae, described by Lindroth in 1963. It is found in North America, with records from Canada and the United States. No observations have been recorded in iNaturalist.
Blattarakans
Blattarakans
Blattarakans is an infraorder within the suborder Polyphaga of beetles (Coleoptera). The group is characterized by particular larval and adult morphological features, though specific diagnostic characteristics are not widely documented in general entomological literature. Members of this infraorder exhibit the typical coleopteran body plan with hardened forewings (elytra) that protect the membranous hindwings and abdomen.
Bostrichoidea
Carpet, Powderpost, and Deathwatch Beetles
Bostrichoidea is a superfamily of beetles within the infraorder Bostrichiformia. It encompasses several families including Bostrichidae (powder-post and horned beetles), Dermestidae (carpet beetles), Endecatomidae, and Ptinidae (death-watch and spider beetles). Members are predominantly associated with dry habitats and exhibit diverse ecological roles ranging from wood-boring to scavenging on dried organic matter. The superfamily is united by modified cryptonephridism, male aedeagus structure, and larval mandibular morphology lacking a basal mola.
Brachypsectridae
Texas beetles
Brachypsectridae is a small family of beetles in the superfamily Elateroidea, commonly known as Texas beetles. The family contains two extant genera—Brachypsectra (cosmopolitan in arid regions) and Asiopsectra (Central Asia and Middle East)—plus several fossil genera from Cretaceous amber. Adults are small, soft-bodied beetles lacking the functional prothoracic clicking mechanism typical of related elateroids. Larvae are highly distinctive ambush predators with flattened bodies and feathery lateral lobes.
Brontinae
Brontinae is a subfamily of beetles in the family Silvanidae, established by Blanchard in 1845. These beetles are part of the superfamily Cucujoidea, a diverse group of small to medium-sized beetles often associated with stored products, decaying plant matter, or fungal habitats. The subfamily contains multiple genera and is primarily distinguished by morphological features of the head and antennae. Brontinae species are found across various regions but are not as extensively studied as some other silvanid groups.
Byrrhodes
death-watch beetles, spider beetles
Byrrhodes is a genus of small beetles in the family Ptinidae, commonly referred to as death-watch and spider beetles. The genus contains approximately 14 described species. These beetles are typically associated with dry organic materials and wood products. Taxonomic placement has varied, with some sources historically placing the genus in Anobiidae.
Callimoxys
blood-necked longhorn (for C. sanguinicollis)
Callimoxys is a genus of long-horned beetles (Cerambycidae) in the tribe Stenopterini. The genus comprises eight extant species and one fossil species, distributed primarily in North America and Europe. Species are generally small to medium-sized cerambycids with slender bodies. The genus was established by Kraatz in 1863.
Calochrominae
Calochrominae is a subfamily of net-winged beetles (family Lycidae) established by Lacordaire in 1857. The subfamily contains at least 4 genera and more than 30 described species, organized into two tribes: Calochromini and Slipinskiini. Members of this group share the characteristic elytra with net-like venation typical of Lycidae.
Cantharinae
soldier beetles
Cantharinae is a subfamily of soldier beetles in the family Cantharidae, comprising at least 200 described species. The subfamily is divided into two extant tribes—Cantharini and Podabrini—plus the extinct tribe †Cacomorphocerini known from Baltic amber. Members are distributed globally and are among the most frequently observed beetles in temperate regions. The subfamily has been extensively documented in amber deposits, with multiple fossil genera described from Cretaceous and Eocene deposits.
Cixius yufengi
Cixius yufengi is a species of planthopper in the family Cixiidae, described by Tsaur in 1993. The species belongs to a genus of small, often inconspicuous insects that feed on plant sap. Very little specific information is available about this particular species.
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Bark-gnawing, Checkered, and Soft-winged Flower Beetles
Cleroidea is a superfamily of beetles comprising over 10,000 species across approximately 24 families. Members are generally slender with soft, flexible elytra and typically bear hairy or scaly integuments. The superfamily exhibits diverse feeding strategies: predation (Cleridae, Trogossitinae), pollen/nectar consumption (melyrid lineage), and fungivory (many Trogossitidae and smaller families). Aposematic coloration occurs in some groups, particularly Cleridae and Malachiinae, mimicking unpalatable arthropods such as blister beetles, net-winged beetles, and stinging Hymenoptera.
Coleoptera
beetles
Coleoptera, commonly known as beetles, is the largest order of insects and the most diverse order of organisms on Earth, comprising approximately 400,000 described species. Members are distinguished by their hardened forewings, called elytra, which form a protective shell over the membranous hindwings and abdomen. This order includes about 40% of all described insect species and 25% of all known animal life-forms. Beetles occupy virtually every terrestrial and freshwater habitat, with species ranging from minute (under 1 mm) to large (over 100 mm). The order is divided into four suborders: Archostemata, Adephaga, Myxophaga, and Polyphaga, with Polyphaga containing the vast majority of species.
Colonidae
Colonidae is a small family of beetles in the superfamily Staphylinoidea, commonly known as colon beetles. The family contains approximately 50 described species in the single genus *Colon*. These beetles are small, compact, and primarily associated with decaying organic matter and fungi. They are closely related to the rove beetles (Staphylinidae) but are distinguished by their more rounded body form and reduced elytra that still cover most of the abdomen.
Conibius
Conibius is a genus of darkling beetles (family Tenebrionidae) established by John Lawrence LeConte in 1851. The genus occurs across the Nearctic, Neotropic, and Oceania biogeographic realms, with 116 iNaturalist observations indicating moderate documentation. As a member of Tenebrionidae, these beetles are characterized by hardened forewings (elytra) and generally cryptic habits. The genus lacks significant economic importance and has received limited dedicated study.
Corticotomus
Corticotomus is a genus of beetles in the family Trogossitidae, established by Sharp in 1891. Members of this genus are part of a family commonly known as bark-gnawing beetles, though specific ecological details for Corticotomus remain limited in published literature. The genus is represented by observations on iNaturalist, indicating ongoing documentation by naturalists.
Cucujoidea
flat bark beetles, fungus beetles, sap beetles
Cucujoidea is a superfamily of beetles within the infraorder Cucujiformia, comprising 25 extant families and two extinct families. This group includes fungus beetles, flat bark beetles, sap beetles, and diverse lineages of 'bark beetles' unrelated to the true bark beetles (Scolytinae, Curculionoidea). Members exhibit varied morphology without unifying external features, though adults share internal characteristics including open procoxal cavities and specific tarsal formulas. The superfamily formerly encompassed families now placed in Coccinelloidea. Ecologically, most species have cryptic habits in fungi, leaf litter, or dead wood, with some lineages associated with flowers or stored food products.
Cyphea
Cyphea is a genus of rove beetles in the family Staphylinidae, subfamily Aleocharinae, and tribe Homalotini. It was described by Fauvel in 1863. The genus contains at least one described species, Cyphea curtula. Members of this genus are found in Europe and North America.
Dascilloidea
soft bodied plant beetles, cicada beetle and cicada parasite beetles
Dascilloidea is a small superfamily of polyphagan beetles containing two families: Dascillidae (soft-bodied plant beetles) and Rhipiceridae (cicada beetles and cicada parasite beetles). Members exhibit diverse ecological strategies, with some associated with plants and others parasitic on cicadas. The superfamily is part of the infraorder Elateriformia within the suborder Polyphaga.
Derodontidae
tooth-necked fungus beetles
Derodontidae is a small family of beetles comprising 42 species in 4 genera and 3 subfamilies. Members are commonly known as tooth-necked fungus beetles due to the spiny pronotal margins found in most genera, though the genus Laricobius lacks these spines. The family is notable for possessing two ocelli on the head, an unusual trait among beetles. The genus Laricobius has gained significant attention as a biological control agent for invasive adelgids threatening hemlock forests in North America.
Dicranopselaphus
water-penny beetles
Dicranopselaphus is a genus of water-penny beetles in the family Psephenidae, comprising over 40 described species. The genus exhibits a disjunct distribution spanning Asia and North America. Members are aquatic beetles with distinctive flattened, oval larval forms adapted to clinging to submerged surfaces in flowing water.
Dinapate
giant palm borer
Dinapate is a genus of beetles in the family Bostrichidae, native to North America. The genus includes Dinapate wrightii, known as the giant palm borer, which has been documented as a pest of native desert palms in the southwestern United States and Mexico. Records indicate association with palm oases in arid regions.
Diplocoelus
Diplocoelus is a genus of small beetles in the family Biphyllidae, comprising approximately 45 described species distributed across multiple continents. The genus includes both extant species and one fossil species (D. probiphyllus) known from Baltic amber. Species within Diplocoelus exhibit considerable morphological diversity in body form and surface sculpturing. The genus was established by Guérin-Méneville in 1838.
Dorcaschema
Dorcaschema is a genus of longhorn beetles in the family Cerambycidae, subfamily Lamiinae. The genus is native to the New World. Species in this genus are characterized by their elongated bodies and long antennae typical of cerambycids. The genus was established by Haldeman in 1847.
Dryobiini
Dryobiini is a small tribe of longhorn beetles (Cerambycidae) within the subfamily Cerambycinae. The tribe contains at least three genera: Anisotyma (monotypic), Dryobius, and Ornithia. These beetles are characterized by their elongated bodies and antennae, typical of cerambycids. The tribe has been documented from the southwestern United States through Mexico.
Dyscinetus
Rice Beetles
Dyscinetus is a genus of scarab beetles in the tribe Cyclocephalini, commonly known as rice beetles. The genus contains at least 24 described species distributed across the Nearctic and Neotropical regions. Larval stages have been described for some species, including D. dubius, but detailed biological information remains limited for most taxa.
Emmesa
Emmesa is a genus of false darkling beetles in the family Melandryidae, established by Newman in 1838. The genus comprises approximately five described species. These beetles belong to the order Coleoptera and are classified within the family Melandryidae, a group commonly known as false darkling beetles.
Endomychidae
Handsome Fungus Beetles
Endomychidae, commonly known as handsome fungus beetles, is a moderately diverse family of mycetophagous beetles comprising approximately 90 genera and 1600 species. The family is distributed across all biogeographic realms with highest diversity in tropical regions. Members are obligate fungus-feeders, typically associated with fruiting bodies of mushrooms and other fungi. The family has undergone significant taxonomic revision, with former subfamilies Anamorphinae, Mycetaeinae, and Eupsilobiinae elevated to separate families based on molecular phylogenetic studies.
Epiphanis
false click beetles
Epiphanis is a genus of false click beetles in the family Eucnemidae, established in 1829. It is the type genus of the tribe Epiphanini. The genus includes both extant and extinct species distributed across Europe, North America, and Southeast Asia.
Erotylidae
Pleasing Fungus Beetles
Erotylidae, commonly known as pleasing fungus beetles, is a family of beetles in the superfamily Erotyloidea containing over 100 genera. The family includes six tribes (Tritomini, Dacnini, Megalodacnini, Erotylini, Cryptophilini, and Languriini) and ten subfamilies. Members feed on plant and fungal matter; some species serve as important pollinators of ancient cycads, while a few are significant agricultural pests. The oldest known fossil is from Early Cretaceous (Barremian) Lebanese amber.
Esthesopus
Esthesopus is a genus of click beetles (Elateridae) in the subfamily Cardiophorinae. Members of this genus possess the characteristic click mechanism of elaterids, allowing them to right themselves when overturned. The genus was established by Eschscholtz in 1829 and is classified within the diverse Elateroidea superfamily. Species within Esthesopus share the general morphology of Cardiophorinae, including elongated bodies and often patterned elytra.
Eubulus
hidden snout weevils
Eubulus is a genus of hidden snout weevils in the family Curculionidae, established by Kirsch in 1870. The genus contains at least 200 described species. These beetles are characterized by a concealed rostrum that is not visible from above, a trait that distinguishes them from many other weevil genera.
Euxestidae
Euxestidae is a small family of beetles in the superfamily Coccinelloidea, containing approximately 70 extant species across 10 genera. Formerly treated as a subfamily of Cerylonidae, they were elevated to family status based on morphological and phylogenetic evidence. Members are primarily tropical and subtropical in distribution, with most species occurring in the Afro-Eurasian region. They inhabit concealed microhabitats including decomposing wood, leaf litter, and the nests of social insects.
Genuchinus
Genuchinus is a genus of myrmecophilous scarab beetles comprising approximately 10 described species. These beetles are associated with ant colonies, though specific details of these relationships remain poorly documented. The genus was established by Westwood in 1874 and is classified within the tribe Cremastocheilini, subtribe Cremastocheilina. Most species have been described from Central and South America.
Halacritus
Halacritus is a genus of clown beetles (family Histeridae) established in 1893. The genus contains more than 20 described species. Members of this genus belong to the subfamily Abraeinae and tribe Acritini. These beetles are part of the diverse histerid fauna, though specific ecological details for the genus remain poorly documented.
Histeridae
clown beetles, hister beetles
Histeridae is a cosmopolitan family of predatory beetles containing more than 410 genera and 4,800 described species worldwide. Members are commonly known as clown beetles or hister beetles. They are immediately recognizable by their shortened elytra that leave two abdominal tergites exposed, and their elbowed antennae with clubbed, lamellate ends. The family exhibits remarkable ecological diversity, with species occupying niches ranging from carrion and dung to ant and termite colonies, forest litter, and tree bark. Their predatory habits on fly larvae and other arthropods have made them valuable for biological control and forensic entomology.
Kateretidae
Short-winged Flower Beetles
Kateretidae, commonly known as short-winged flower beetles, is a family of small beetles in the superfamily Cucujoidea. The family contains 10 extant and 4 extinct genera with at least 40 described species distributed worldwide except New Zealand. Adults feed on flowers (anthophagous), while larvae develop within flower corollas where they consume pollen (spermatophagous). The family has been the subject of taxonomic revision, with several Cretaceous amber fossils originally described as kateretids subsequently reclassified to other families.
Laneganus
Laneganus is a genus of click beetles (family Elateridae). As a genus within this family, its members possess the characteristic elongated body form and pronotal structure that enables the distinctive clicking mechanism for righting themselves when overturned. The genus contains multiple described species, though detailed biological information remains limited in available literature.
Languria
lizard beetles
Languria is a genus of lizard beetles (Coleoptera: Erotylidae: Languriinae) established by Latreille in 1802. The genus contains approximately 15-18 described species distributed primarily in North America and the Oriental Region. Members are characterized by their association with plant stems, where larvae develop as internal borers. Several species have been documented as agricultural pests when they colonize cultivated crops outside their native host range.
Leiodidae
Round Fungus Beetles
Leiodidae is a globally distributed family of small beetles containing approximately 3,800 described species. Commonly known as round fungus beetles, many species exhibit a compact, globular body form, though some are more elongated. The family encompasses diverse ecological specializations including fungivory, detritivory, carrion-feeding, and subterranean cave-dwelling. About half of all described species are flightless due to reduced or absent wings. The tribe Leptodirini represents one of the most diverse radiations of subterranean animals, with over 1,300 species adapted to cave habitats.
Lemini
shining leaf beetles
Lemini is a tribe of leaf beetles within the subfamily Criocerinae, characterized by their often metallic or shiny appearance. Members are placed in the family Chrysomelidae, a large group of herbivorous beetles commonly known as leaf beetles. The tribe was established by Gyllenhal in 1813 and contains multiple genera distributed across various regions.