Scarabaeidae
Guides
Orizabus pinalicus
Orizabus pinalicus is a rhinoceros beetle described in 2011 from the southwestern United States. It belongs to the genus Orizabus, a group of relatively small dynastine scarabs. The species is known from limited records in Arizona and Texas.
Oryctini
rhinoceros beetles
Oryctini is a tribe of large, robust scarab beetles within the subfamily Dynastinae, commonly referred to as "rhinoceros beetles." Members range from 25–60 mm in length and are typically dark brown to black. The tribe includes approximately 25 genera distributed worldwide, with particular diversity in the Neotropical region. Several species are economically significant pests, notably in the genus Oryctes, which damages palms and sugarcane. Males frequently possess pronounced horns or armored projections on the head and pronotum, with horn development influenced by larval nutrition.
Oscarinus abusus
Oscarinus abusus is a dung beetle species in the family Scarabaeidae, subfamily Aphodiinae. It has been documented in the south-central United States. Like other members of its genus, it likely contributes to dung decomposition in cattle farming environments.
Oscarinus bottimeri
Oscarinus bottimeri is a dung beetle in the family Scarabaeidae, subfamily Aphodiinae, described by Cartwright in 1957. The genus Oscarinus contains species associated with cattle dung in agricultural environments. Like related species in the genus, O. bottimeri likely contributes to nutrient cycling and soil aeration through dung burial activities.
Oscarinus brimleyi
Oscarinus brimleyi is a dung beetle species in the family Scarabaeidae, subfamily Aphodiinae. It has been documented in the southeastern United States, specifically in North Carolina, South Carolina, and Texas. As a member of the genus Oscarinus, it is likely associated with mammal dung, though specific ecological details for this species remain limited in published literature. The species was described by Cartwright in 1939.
Oscarinus matiganae
A dung beetle species in the family Scarabaeidae, described by Paulsen in 2006. It belongs to the genus Oscarinus, which comprises beetles associated with vertebrate dung. The species has been recorded from Nebraska and Texas in the United States.
Oscarinus welderi
Oscarinus welderi is a species of dung beetle in the family Scarabaeidae, first described in 2007 from Texas. It belongs to a genus known for dung-feeding ecology, though specific details for this species remain limited. The species is documented from very few observations.
Osmoderma
Typical Hermit Beetles, Hermit Beetles
Osmoderma is a genus of scarab beetles in the subfamily Cetoniinae, commonly known as hermit beetles. The genus has a Holarctic distribution, with species found across Europe, parts of Asia, and North America. Several European species, particularly O. eremita and O. barnabita, are of significant conservation concern due to habitat loss and are protected under the EU Habitats Directive. The genus is characterized by its dependence on tree hollows for larval development, making it highly vulnerable to forest management practices that remove dead wood and veteran trees.
saproxylicconservationHabitats-Directivetree-hollowsveteran-treesindicator-speciesumbrella-specieswood-mouldCetoniinaeScarabaeidaeHolarcticEuropeNorth-Americathreatened-speciesdead-woodforest-managementcitizen-sciencedetection-dogsex-situ-breedingpollardingtraditional-agricultural-landscapesmetapopulationhabitat-fragmentationold-growth-forestbroad-leaved-treesoaklimewillowbeechorchardshedgerowsurban-parkspheromone-monitoringradio-trackingphoretic-mitesScopoli-1763Le-Peletier-&-Serville-1828O.-eremitaO.-barnabitaO.-eremicolahermit-beetleOtophorus haemorrhoidalis
Otophorus haemorrhoidalis is a species of dung beetle in the family Scarabaeidae, subfamily Aphodiinae. It has a broad distribution spanning the Palearctic region (Europe, Asia, and North Africa) and has been introduced to the Nearctic region (North America), where it is established in Canada and the United States. The species is associated with dung habitats and plays a role in nutrient cycling. Despite its wide distribution, detailed biological studies on this species remain limited.
Paracotalpa
little bears
Paracotalpa is a genus of scarab beetles in the subfamily Rutelinae, commonly known as "little bears" due to the fuzzy, hairy appearance of adults. The genus contains four recognized species distributed west of the Rocky Mountains in western North America. Adults are active primarily in spring and are associated with various plant communities in arid and semi-arid regions.
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.
Paracotalpa ursina rubripennis
Paracotalpa ursina rubripennis is a subspecies of scarab beetle in the family Scarabaeidae. As a member of the genus Paracotalpa, it belongs to a group of beetles commonly known as June beetles or May beetles. The subspecies epithet "rubripennis" refers to reddish wing covers, suggesting distinctive coloration in the elytra. Limited specific information is available about this particular subspecies beyond its taxonomic placement.
Paranovelsis varicolor
Paranovelsis varicolor is a flower chafer beetle in the subfamily Cetoniinae, distinguished by its variable coloration. The species belongs to a small genus of scarabs found in the Neotropical region. It exhibits the typical compact, convex body form characteristic of many flower chafers.
Parapsammodius bidens
Parapsammodius bidens is a small aphodiine dung beetle in the family Scarabaeidae. It belongs to the tribe Psammodiini, which includes many sand-dwelling species. The species was described by Horn in 1871 and is known from scattered records across the southeastern United States, Caribbean islands, and Puerto Rico. Like other members of its tribe, it is likely associated with sandy substrates and decomposing organic matter.
Parapsammodius puncticollis
Parapsammodius puncticollis is a species of aphodiine dung beetle in the family Scarabaeidae. The species was described by LeConte in 1858. It has been recorded from the southwestern United States and Mexico.
Parastasia
Parastasia is a genus of scarab beetles in the family Scarabaeidae, currently classified within the subfamily Rutelinae but with strong molecular evidence suggesting placement in the subfamily Dynastinae near the tribe Cyclocephalini. The genus occurs in Southeast Asia and includes at least four described species. Adults are associated with the flowers of aroid plants (Araceae), particularly Amorphophallus and Epipremnum.
Parataenius
Parataenius is a genus of small aphodiine dung beetles in the family Scarabaeidae, established by Balthasar in 1961. The genus comprises approximately six described species distributed primarily in the Neotropical region. Members are classified within the tribe Eupariini. Parataenius simulator has been introduced to Rapa Nui (Easter Island), Chile, where it was detected at Mataveri International Airport.
Pardalosus pardalis
Pardalosus pardalis is a scarab beetle species in the family Scarabaeidae, subfamily Aphodiinae. First described by LeConte in 1857, this species is distributed across western North America, with records from California, Idaho, Nebraska in the United States, and British Columbia in Canada. It belongs to the dung beetle group Aphodiini, though specific ecological details remain poorly documented.
Pardalosus sayi
Pardalosus sayi is a species of scarab beetle in the family Scarabaeidae, subfamily Aphodiinae. The species was described by Robert D. Gordon in 2006. It belongs to a genus of small dung beetles distributed in North America. Like other aphodiine scarabs, it is likely associated with dung decomposition, though specific ecological details remain poorly documented.
Pelidnota
Precious Metal Scarabs
Pelidnota is a genus of scarab beetles in the family Scarabaeidae, containing over 180 described species. Members are commonly known as Precious Metal Scarabs. The genus is restricted to the Neotropics. Beetles in this genus are generally robust and often exhibit metallic coloration.
Pentodontini
rhinoceros beetles
Pentodontini is the most diverse tribe within the subfamily Dynastinae (rhinoceros beetles), containing over 100 genera distributed across multiple biogeographic regions. Most genera are restricted to a single biogeographic region. The tribe is characterized by substantial morphological diversity, with generic-level identification often relying on mouthpart morphology in females and secondary sexual characters (horns, claw modifications, antennal club length) in males.
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amithaon
Phanaeus amithaon is a species of dung beetle in the family Scarabaeidae. It is a member of the genus Phanaeus, which includes several North and Central American species known for their bright metallic coloration and distinctive horns in males. The species occurs in the southwestern United States and across much of Mexico.
Phanaeus difformis
Phanaeus difformis is a dung beetle in the family Scarabaeidae native to the south-central United States and adjacent far northern Mexico. It belongs to a genus known for colorful, horned males that specialize in burying mammal dung for larval development. The species may hybridize with the more common P. vindex where their ranges overlap. Like other Phanaeus species, it provides ecosystem services through dung burial and nutrient recycling.
Phanaeus texensis
Texas Black Phanaeus
Phanaeus texensis is a dung beetle species in the family Scarabaeidae, first described by Edmonds in 1994. The species belongs to a genus renowned for its colorful, horned males and ecological role in dung burial. It is found in Texas and adjacent regions of Mexico.
Phileurini
Phileurini is a tribe of scarab beetles within the subfamily Dynastinae, established by Burmeister in 1847. The tribe includes two subtribes: Cryptodina (Burmeister & Schaum, 1840) containing the genus Cryptodus, and Phileurina (Burmeister, 1847). Members of this tribe are primarily Neotropical in distribution, with some species extending into North America. The genus Phileurus, the namesake of the tribe, includes species that are sometimes mistaken for bess beetles (Passalidae) due to their flattened, parallel-sided body form.
Phileurus truncatus
Triceratops Beetle
Phileurus truncatus, commonly known as the Triceratops Beetle, is a large scarab beetle in the family Scarabaeidae. The species is named for its distinctive horn-like projections on the head and pronotum, which resemble the horns of a triceratops dinosaur. It occurs across the southern United States and extends south through Mexico into Central America. Adults are nocturnal and frequently attracted to ultraviolet and mercury-vapor lights.
Phileurus valgus
Phileurus valgus is a small dynastine scarab beetle in the tribe Phileurini, distributed from the southern United States through Central America and into South America. Adults are attracted to lights and have been found under bark of decaying wood. Larvae develop in rotting wood cavities. The species is sometimes mistaken for bess beetles (Passalidae) due to its flattened, parallel-sided body form.
Phobetus
May beetles, junebugs
Phobetus is a genus of scarab beetles in the family Scarabaeidae, subfamily Melolonthinae, commonly known as May beetles or junebugs. The genus was established by LeConte in 1856 and contains approximately 11 described species. Species in this genus are distributed in arid and semi-arid regions of western North America, with several species endemic to specific desert mountain ranges. The genus is classified in the tribe Phobetusini, which is endemic to the Nearctic region.
Phobetus palpalis
Phobetus palpalis is a species of scarab beetle in the family Scarabaeidae, subfamily Melolonthinae, and tribe Phobetusini. Described by Saylor in 1936, this species is known from California in the western United States. The genus Phobetus belongs to a group of scarab beetles commonly referred to as May beetles or June beetles, though specific biological details for this species remain poorly documented in published literature.
Phobetus saylori
Phobetus saylori is a species of scarab beetle in the family Scarabaeidae, described by Cazier in 1937. It belongs to the tribe Phobetusini within the subfamily Melolonthinae. The species is known from a small number of observations and has a restricted distribution in western North America.
Phyllophaga aemula
May beetle, June beetle
Phyllophaga aemula is a species of scarab beetle in the family Scarabaeidae, commonly known as a May beetle or June beetle. It belongs to a large genus of over 400 species in North America, many of which are difficult to distinguish without examination of genitalia. Like other members of its genus, it has subterranean larval stages and aerial adults. The species was originally described as Lachnosterna aemula by Horn in 1887.
Phyllophaga amplicornis
Phyllophaga amplicornis is a species of May beetle in the family Scarabaeidae, subfamily Melolonthinae. The species was described by Gahan. As a member of the genus Phyllophaga, it is one of over 400 species in North America, making this genus one of the most speciose scarab groups in the region. Species in this genus are commonly known as May beetles or June beetles. The larvae are soil-dwelling white grubs that feed on plant roots, while adults feed on foliage and flowers.
Phyllophaga antennata
Phyllophaga antennata is a species of scarab beetle in the family Scarabaeidae. It occurs in North America, with distribution records from Mississippi and Texas. The species was originally described by Smith in 1889 and has been synonymized under the genus Trichesthes in some taxonomic treatments.
Phyllophaga balia
Phyllophaga balia is a species of scarab beetle in the family Scarabaeidae, one of more than 400 species in the genus Phyllophaga (May beetles) in North America. Like other members of this speciose genus, it is found in North America, with records from the eastern and central United States and Canada. Species-level identification within Phyllophaga is notoriously difficult, often requiring examination of male and female genitalia.
Phyllophaga calceata
Phyllophaga calceata is a species of scarab beetle in the family Scarabaeidae, first described by LeConte in 1856 under the basionym Lachnosterna calceata. It belongs to the genus Phyllophaga, one of the most species-rich genera of beetles in North America with over 400 species. Like other members of this genus, it is commonly known as a May beetle or June beetle. The species is found in the southeastern United States.
Phyllophaga congrua
May beetle, June beetle
Phyllophaga congrua is a scarab beetle in the family Scarabaeidae, distributed across the central and eastern United States. Like other members of the genus Phyllophaga, the larvae are soil-dwelling white grubs that feed on plant roots. The species contributes to soil ecosystem processes through burrowing activity, though this can result in agricultural damage when larval densities are high.
Phyllophaga curialis
May beetle, June beetle
Phyllophaga curialis is a species of scarab beetle in the genus Phyllophaga, commonly known as May beetles or June beetles. The species was described by Reinhard in 1939 and is known from Texas in the southern United States. Like other members of this large genus, the larvae are soil-dwelling root feeders while adults feed on foliage and flowers. The genus Phyllophaga contains over 400 species in North America, many of which are economically significant agricultural pests.
Phyllophaga drakii
May beetle, June beetle
Phyllophaga drakii is a species of scarab beetle in the family Scarabaeidae, commonly known as May beetles or June beetles. The species is found across North America, with records from Canada (Alberta, Manitoba, New Brunswick, Nova Scotia, Ontario, Prince Edward Island, Quebec, Saskatchewan) and the United States (Alabama, Colorado, Georgia, Indiana, Iowa, Maryland, Mississippi, Nebraska, Texas, Virginia, Wisconsin, and eastern states west to New Mexico and South Dakota). Like other members of the genus Phyllophaga, adults are nocturnal and attracted to lights. The genus contains over 400 species in North America, making it one of the most species-rich scarab genera on the continent.
Phyllophaga ephilida
Phyllophaga ephilida is a species of scarab beetle in the family Scarabaeidae. It occurs in Central America and North America, with two recognized subspecies: P. ephilida ephilida and P. ephilida virilis. As a member of the genus Phyllophaga (May beetles), it belongs to a highly speciose group of scarabs whose larvae are root-feeding white grubs.
Phyllophaga epigaea
Phyllophaga epigaea is a species of scarab beetle in the family Scarabaeidae. It is one of over 400 species in the genus Phyllophaga, commonly known as May beetles or June beetles. The species is found in North America, with records from Texas in the United States and Nuevo León in Mexico. Like other members of its genus, it is likely nocturnal and associated with soil habitats.
Phyllophaga errans
Phyllophaga errans is a species of scarab beetle in the genus Phyllophaga, commonly known as May beetles or June beetles. The genus contains over 400 species in North America, making it one of the most speciose beetle genera in the region. Species-level identification within Phyllophaga is notoriously difficult and typically requires examination of male and female genitalia. P. errans occurs in the western United States.
Phyllophaga farcta
Phyllophaga farcta is a species of scarab beetle in the family Scarabaeidae, commonly known as May beetles or June bugs. The species was described by LeConte in 1856. Like other members of the genus Phyllophaga, it is likely nocturnal and attracted to lights. Available information on this species is limited compared to better-studied congeners.
Phyllophaga futilis
lesser June beetle
Phyllophaga futilis, commonly known as the lesser June beetle, is a species of scarab beetle in the family Scarabaeidae. It is found in North America, with distribution records spanning across the United States and southern Canada. Like other members of the genus Phyllophaga, it is commonly referred to as a May beetle or June beetle. The species is part of a large genus containing over 400 species in North America, many of which are difficult to distinguish without examination of genitalia.
Phyllophaga georgiana
Phyllophaga georgiana is a species of scarab beetle in the family Scarabaeidae, described by Horn in 1885. It belongs to the genus Phyllophaga, commonly known as May beetles or June beetles, whose larvae are familiar white grubs that feed on plant roots. The species is found in the southeastern United States.
Phyllophaga glabricula
Phyllophaga glabricula is a scarab beetle in the family Scarabaeidae, first described by LeConte in 1856. It belongs to the genus Phyllophaga, commonly known as May beetles or June bugs, which contains over 400 species in North America. The species is found in Central America and North America, with records from the western and central United States and northern Mexico. Like other Phyllophaga species, adults are likely nocturnal and attracted to lights, while larvae are soil-dwelling white grubs that feed on plant roots.
Phyllophaga hornii
May beetle, Junebug
Phyllophaga hornii is a species of scarab beetle commonly known as a May beetle or Junebug. First described by Smith in 1889 under the name Lachnosterna hornii, it belongs to the large genus Phyllophaga, which comprises numerous North American species often collectively referred to as May or June beetles. The species occurs across a broad geographic range in the eastern and central United States.
Phyllophaga idonea
Phyllophaga idonea is a species of May beetle in the family Scarabaeidae, described by Sanderson in 1948. Like other members of the genus Phyllophaga, it belongs to a highly diverse group of scarab beetles with over 400 species in North America. Species in this genus are typically nocturnal as adults, with larvae feeding on plant roots in soil. The specific biology and ecology of P. idonea remain poorly documented compared to some congeners.
Phyllophaga ignava
May beetle, June beetle
Phyllophaga ignava is a species of scarab beetle in the family Scarabaeidae. It is found in Central America and North America. As a member of the genus Phyllophaga, commonly known as May beetles or June beetles, it shares the typical characteristics of the group including nocturnal adults and root-feeding larvae.
Phyllophaga karlsioei
May beetle, June beetle
Phyllophaga karlsioei is a species of scarab beetle in the family Scarabaeidae, one of over 400 species in the genus Phyllophaga found in North America. Like other May beetles, it is likely nocturnal with adults emerging in late spring to early summer. The genus is characterized by larvae that feed on plant roots in soil, earning them the common name 'white grubs.'
Phyllophaga latidens
Phyllophaga latidens is a species of scarab beetle in the family Scarabaeidae, commonly known as a May beetle or June beetle. It belongs to a large genus of more than 400 species in North America. The species is found in the southwestern United States, specifically in Arizona. Like other members of the genus, adults are nocturnal and attracted to lights, while larvae are soil-dwelling white grubs that feed on plant roots.