Nearctic
Guides
Pentaphyllus testaceus
Pentaphyllus testaceus is a species of darkling beetle in the family Tenebrionidae. It was originally described by Hellwig in 1792 under the name Mycetophagus testacea. The species has been documented in parts of Europe and North America, including Ontario, Canada. Darkling beetles in this family are generally associated with decaying organic matter and dry habitats.
Penthimia trimaculata
Penthimia trimaculata is a species of leafhopper in the family Cicadellidae, subfamily Deltocephalinae, described by Motschulsky in 1863. The species belongs to the tribe Penthimiini, a group of small to medium-sized leafhoppers with distinctive morphological features. Very little is documented about its biology or ecology. Records indicate presence in Louisiana, USA.
Pentispa distincta
Pentispa distincta is a small leaf beetle in the family Chrysomelidae, subfamily Cassidinae. Adults measure 4.5-5.2 mm in length. The species occurs in Texas (USA), Mexico, and Guatemala. Adults have been collected on Eupatorium azureum, though the specific food plant remains unknown.
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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constrictus
Perigenes constrictus is a species of seed bug in the family Rhyparochromidae, commonly referred to as a dirt-colored seed bug. It occurs across North America and Central America. The species was described by Thomas Say in 1831. Like other members of its family, it is likely associated with ground-level habitats and seed-feeding ecology, though specific biological details remain poorly documented in published sources.
Perithemis domitia
slough amberwing
Perithemis domitia, commonly known as the slough amberwing, is a small skimmer dragonfly in the family Libellulidae. It is distributed across a broad geographic range including the Caribbean, Central America, North America, and South America. The species is listed as Least Concern by the IUCN with a stable population.
Peritrechus fraternus
dirt-colored seed bug
Peritrechus fraternus is a species of seed bug in the family Rhyparochromidae, described by Uhler in 1871. It belongs to a group commonly referred to as dirt-colored seed bugs, characterized by their dull, earth-toned coloration. The species occurs across much of North America and extends into Central America. Records indicate presence in Canada, the United States, and Mexico.
Perlodini
Perlodini is a tribe of stoneflies (order Plecoptera) within the family Perlodidae, established by Klapálek in 1909. The tribe comprises more than 80 described species distributed across the Palaearctic and Nearctic regions. Perlodini belongs to the subfamily Perlodinae and represents a well-defined lineage within the systellognathan stoneflies, though specific ecological traits of the tribe as a whole remain incompletely documented.
Peucetia
Green Lynx Spiders
Peucetia is a genus of lynx spiders (family Oxyopidae) distributed worldwide, containing approximately 47 species as of 2025. The genus is notable for its association with plants bearing glandular trichomes, a specialized ecological relationship that has evolved independently across multiple continents. North American species include P. viridans, the largest lynx spider on the continent, and P. longipalpis in the southwestern United States. Several species exhibit complex maternal care behaviors and occupy distinct microhabitats that facilitate coexistence of sympatric congeners.
Phaedon laevigatus
watercress leaf beetle
Phaedon laevigatus, commonly known as the watercress leaf beetle, is a leaf beetle in the family Chrysomelidae. The species has a transcontinental distribution spanning Europe, Northern Asia (excluding China), and North America. It is associated with watercress and related plants in the family Brassicaceae. The specific epithet 'laevigatus' refers to the smooth or polished appearance of the elytra.
Phaloesia saucia
Saucy Beauty, Saucy Beauty Moth
Phaloesia saucia, commonly known as the Saucy Beauty, is a moth in the family Erebidae found from the Lower Rio Grande Valley of Texas through tropical regions to Venezuela. This species belongs to the tiger moth lineage within the Arctiinae subfamily. The common name references the species epithet 'saucia,' meaning 'wounded' or 'hurt' in Latin, though the origin of 'Saucy Beauty' as a vernacular name is not documented in available sources.
Phanaeus quadridens
Phanaeus quadridens is a species of dung beetle in the family Scarabaeidae, subfamily Scarabaeinae. It belongs to the genus Phanaeus, a group known for their role in dung burial and nutrient recycling. The species has been documented in the southwestern United States and Mexico. Two subspecies are recognized: P. q. quadridens and P. q. borealis.
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.
Phasia chilensis
Phasia chilensis is a tachinid fly in the genus Phasia, a large and taxonomically complex group of parasitoid flies. The species was originally described as Hyalomya chilensis by Macquart in 1851 and has undergone significant taxonomic revision, with four junior synonyms recently synonymized under it. As a member of the Phasiinae subfamily, it likely functions as a parasitoid of true bugs (Hemiptera), though specific host records for this species require confirmation from the primary literature. The genus Phasia exhibits substantial morphological diversity and has a broad distribution across multiple continents.
Phaulotettix
Phaulotettix is a genus of flightless grasshoppers in the family Acrididae, subfamily Melanoplinae. The genus contains approximately 15 described species distributed in the Nearctic region. These grasshoppers are associated with arid and semi-arid environments in the southwestern United States and Mexico. They have been observed sheltering beneath leaves during extreme heat.
Phegoneus
Phegoneus is a genus of darkling beetles (family Tenebrionidae) described by Casey in 1907. The genus is distributed in the Nearctic and Neotropical regions, with very few observations documented in biodiversity databases. As a member of the speciose family Tenebrionidae, species in this genus likely exhibit the hardened forewings (elytra) and general body plan characteristic of the family. The genus remains poorly known, with limited published information on its biology and ecology.
Pheidole porcula
Pheidole porcula is a species of big-headed ant in the genus Pheidole, described by Wheeler in 1908. As a member of this hyperdiverse ant genus, it exhibits the characteristic worker polymorphism with distinct major and minor worker castes. The species is placed within the tribe Attini, though unlike the well-known fungus-growing ants in this tribe, most Pheidole species are generalist foragers. Specific details about its biology and ecology remain poorly documented in available literature.
Phidippus bidentatus
Phidippus bidentatus is a species of jumping spider in the family Salticidae. It is found from the United States to Costa Rica. The specific epithet 'bidentatus' refers to two teeth, likely describing a morphological feature of the chelicerae or other mouthparts. Like other members of the genus Phidippus, it possesses the enlarged anterior median eyes characteristic of jumping spiders.
Philonome
Philonome is a genus of small moths established by Chambers in 1874. The genus has undergone taxonomic revision, previously placed in Tineidae or Bucculatricidae but now generally accepted in Lyonetiidae. It contains approximately 12 described species, with several species described by Sohn & Davis in 2015 based on North American material. The genus shows a predominantly Nearctic distribution with records from the United States.
Philothermus puberulus
Philothermus puberulus is a minute bark beetle in the family Cerylonidae, described by Schwarz in 1878. The species has been recorded from the Caribbean Sea, Central America, and North America. Like other members of Cerylonidae, it is a small beetle associated with woody substrates.
Phlepsanus n-sp-ut
Phlepsanus n-sp-ut is an undescribed species in the leafhopper genus Phlepsanus (family Cicadellidae, tribe Chiasmini). The 'n-sp-ut' designation indicates it is a new species from Utah, currently known from specimen records but not yet formally described in scientific literature. Species in this genus are typically associated with grassland and sagebrush habitats.
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 mojavus
Phobetus mojavus is a species of scarab beetle in the family Scarabaeidae, described by Barrett in 1933. It belongs to the subfamily Melolonthinae (May beetles or June beetles) and the tribe Phobetusini. The species is known from California, with its specific epithet suggesting an association with the Mojave 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.
Phoebis
sulphurs, sulfurs
Phoebis, commonly known as sulphurs, is a genus of butterflies in the family Pieridae, subfamily Coliadinae. The genus is native to the Americas, with species distributed from the southern United States through Central and South America. Members are characterized by bright yellow, orange, or white coloration. Several species are known for seasonal migration patterns, particularly northward movements in spring and southward returns in fall. The genus includes economically and ecologically significant species such as the cloudless sulphur (Phoebis sennae), which has been extensively studied for its life history and host plant associations.
Phoebis philea
Orange-barred Sulphur
Phoebis philea, the orange-barred sulphur, is a medium-sized butterfly in the family Pieridae found throughout the Americas from the southern United States to Brazil, including the Caribbean. Adults are known for their bright yellow-orange coloration with distinctive orange bars on the forewings. The species exhibits seasonal variation in generation number, with multiple broods in southern regions and a single generation in northern parts of its range. Larvae feed on Cassia species, while adults visit nectar sources, particularly red-colored flowers.
Phragmatobia fuliginosa
Ruby Tiger, Ruby Tiger Moth
Phragmatobia fuliginosa, the Ruby Tiger, is a moth in the subfamily Arctiinae of family Erebidae. It has a wingspan of 35–45 mm and is distinguished by dark reddish-brown forewings with a blackish comma-shaped spot and bright carmine to rose-red hindwings. The species is widely distributed across the Palearctic and into northern North America, with multiple recognized subspecies including the North American P. f. rubricosa. It exhibits geographic variation in generation time: univoltine in northern regions with adults flying in June, and bivoltine in southern Britain with adults appearing April–June and again August–September.
Phrygionis privignaria
Phrygionis privignaria is a geometrid moth species described by Achille Guenée in 1858. It belongs to the subfamily Ennominae and has a broad distribution spanning the Caribbean, North America, Central America, and South America. The species is assigned MONA/Hodges number 6671.2.
Phyciodes cocyta
northern crescent
Phyciodes cocyta, the northern crescent, is a brush-footed butterfly in the family Nymphalidae. It is distributed across the Nearctic realm, particularly in northern North America. The species has a wingspan of 32–38 mm and is active during summer months. Adults feed on nectar from specific flowering plants, while larvae specialize on Asteraceae species.
Phyciodes pulchella
Field Crescent
Phyciodes pulchella, commonly known as the field crescent, is a small butterfly in the family Nymphalidae. It is found across the Nearctic realm, with a wingspan of 24–36 mm. The species is active from May to August in Canada. Multiple subspecies have been described, reflecting geographic variation across its range.
Phylloicus mexicanus
Phylloicus mexicanus is a species of caddisfly in the family Calamoceratidae, described by Nathan Banks in 1900. The genus Phylloicus is known for larvae that construct distinctive leaf cases using cut pieces of living leaves. This species occurs in the Nearctic and Neotropical regions, with the specific epithet suggesting Mexican distribution. As with other Calamoceratidae, larvae are likely associated with freshwater habitats where they feed on plant material.
Phyllolabis flavida
Phyllolabis flavida is a species of crane fly in the family Limoniidae, described by Charles Paul Alexander in 1918. It is a member of the genus Phyllolabis, which belongs to the subfamily Limnophilinae. The species is known from California, USA, and is part of the Nearctic fauna. Very little specific biological information has been published for this species.
Phyllonorycter maestingella
Beech Midget
Phyllonorycter maestingella is a minute leaf-mining moth in the family Gracillariidae. The species is bivoltine, with adults flying in spring and late summer. Larvae are specialized miners of beech leaves, creating distinctive blotch mines on the leaf underside. The species has a transcontinental distribution spanning Europe, Russia, and western North America.
Phyllophaga blanda
May beetle, June beetle
Phyllophaga blanda is a species of scarab beetle in the family Scarabaeidae, first described by Sanderson in 1958. It belongs to the genus Phyllophaga, commonly known as May beetles or June beetles, a diverse group of soil-dwelling scarabs whose larvae feed on plant roots. The species is known from the Nearctic region, with records from Arizona, USA. Like other members of its genus, it likely exhibits the typical Phyllophaga life cycle with subterranean larval stages and adult emergence in spring or early summer.
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 debilis
Phyllophaga debilis is a species of scarab beetle in the family Scarabaeidae, subfamily Melolonthinae. It belongs to the highly diverse genus Phyllophaga, commonly known as May beetles or June beetles, which contains over 400 species in North America. The species is distributed across the southeastern and mid-Atlantic United States.
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 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 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 inversa
May beetle
Phyllophaga inversa is a scarab beetle species in the family Scarabaeidae, originally described as Lachnosterna inversa by Horn in 1887. It belongs to the genus Phyllophaga, commonly known as May beetles or June beetles, which are characterized by subterranean larval stages that feed on plant roots. The species occurs in both Central America and North America, with documented records from the United States and Canada.
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 psiloptera
Phyllophaga psiloptera is a species of scarab beetle in the family Scarabaeidae, described by Sanderson in 1939. It belongs to the genus Phyllophaga, a large group of beetles commonly known as May beetles or June beetles. The species has been documented in Texas, USA, within the Nearctic region. Like other members of Phyllophaga, it is presumed to have a subterranean larval stage and aerial adult stage, though specific biological details remain poorly documented.
Phyllophaga quercus
Phyllophaga quercus is a species of May beetle in the family Scarabaeidae, native to the eastern and central United States. Like other members of the genus Phyllophaga, it is a soil-dwelling scarab with larvae that feed on plant roots. The species name 'quercus' (Latin for oak) suggests a potential association with oak trees, though specific ecological relationships remain poorly documented. Adults are nocturnal and attracted to lights. The species occurs across a broad geographic range from the Atlantic coastal states westward to Texas and Oklahoma.
Phyllophaga renodis
Phyllophaga renodis is a species of scarab beetle in the genus Phyllophaga, commonly known as May beetles or June bugs. The genus Phyllophaga is one of the most species-rich genera in North America, with over 400 species. Species-level identification within this genus is notoriously difficult and typically requires examination of male and female genitalia. P. renodis is documented from Texas in the Nearctic region. Like other members of the genus, it likely has a subterranean larval stage feeding on plant roots and above-ground adults that feed on foliage.
Phyllophaga riviera
Phyllophaga riviera is a species of scarab beetle in the family Scarabaeidae, described by Reinhard in 1950. It belongs to the genus Phyllophaga, commonly known as May beetles or June beetles, which contains over 400 species in North America. The species is known from Texas within the Nearctic region. Like other members of its genus, it likely has a life cycle involving soil-dwelling larvae that feed on plant roots and adults that feed on foliage.
Phyllophaga rolstoni
Phyllophaga rolstoni is a species of scarab beetle in the family Scarabaeidae, described by Riley and Wolfe in 1995. Like other members of the genus Phyllophaga (May beetles), it is part of a large and taxonomically challenging group of scarab beetles with over 400 species in North America. The species is known from Texas within the Nearctic region.
Phyllophaga rossi
Phyllophaga rossi is a species of scarab beetle in the family Scarabaeidae, described by Saylor in 1939. It belongs to the genus Phyllophaga, commonly known as May or June beetles, a large group of soil-dwelling scarabs whose larvae feed on plant roots. The species is recorded from Arizona, USA, within the Nearctic region. Like other members of its genus, it is presumed to have a subterranean larval stage and aerial adult stage, though specific biological details for this species remain poorly documented.