Palearctic
Guides
Oncopsis flavicollis
Oncopsis flavicollis is a small leafhopper species in the family Cicadellidae, subfamily Eurymelinae. It exhibits sexual dimorphism and is strongly associated with birch trees (Betula spp.), on which it feeds. The species has been subject to taxonomic debate regarding whether populations on different birch species represent distinct biological species or host plant utilization polymorphism. Adults are active from late spring through early autumn.
Opsius
Opsius is a genus of leafhoppers in the family Cicadellidae, established by Fieber in 1866. The genus contains approximately 19 described species distributed across the Palearctic, Afrotropical, and Oriental regions, including Europe, North Africa, the Arabian Peninsula, Central Asia, and India. Species in this genus are obligate associates of Tamarix plants (Tamaricaceae), completing their entire life cycles on these hosts. The genus has gained attention as a potential bioindicator for environmental monitoring due to documented sensitivity to pollutants.
Ornativalva
A genus of small moths in the family Gelechiidae, containing approximately 50 described species arranged into seven species groups. Most species occur in arid and semi-arid regions of the Palearctic, with particular diversity in the Mediterranean, North Africa, Central Asia, and China. Several species have been documented as significant pests of tamarisk shrubs.
Orphilus
Orphilus is a genus of dermestid beetles in the subfamily Orphilinae, established by Erichson in 1846. The genus contains seven described species distributed across the Palearctic region, the Near East, and North America. It is the type genus of its subfamily and has been included in recent comprehensive phylogenetic analyses of Dermestidae.
Orsodacnidae
Ravenous Leaf Beetles
Orsodacnidae is a small family of leaf beetles (Coleoptera: Chrysomeloidea) that was historically classified as a subfamily of Chrysomelidae but is now recognized as distinct. The family contains two subfamilies: Aulacoscelidinae (genera Aulacoscelis, Janbechynea) and Orsodacninae (genus Orsodacne). Members of this family exhibit specialized feeding relationships with cycads and other plants, with documented seed predation by immature stages and folivory by adults.
Orthocephalus saltator
jumping plant bug
Orthocephalus saltator is a Palearctic plant bug in the family Miridae, commonly known as the jumping plant bug. It has an unusually broad distribution spanning Europe, North Africa, and parts of North America. The species is specialized in its feeding habits, primarily consuming plants in the Asteraceae and Poaceae families.
Orthochaetes
Orthochaetes is a genus of weevils in the family Curculionidae, tribe Styphlini, established by Germar in 1823. The genus has Palearctic origins, with at least one species, Orthochaetes setiger, documented as an adventive introduction to North America. Records from Canada indicate establishment in Newfoundland and British Columbia. The genus is characterized by morphological features distinguishing it from other Styphlini genera, requiring modified identification keys for North American fauna.
Orthotaenia undulana
Dusky Leafroller Moth
Orthotaenia undulana is a small tortricid moth with a wingspan of 15–20 mm, distributed across the Palearctic realm. The species exhibits cryptic coloration that provides camouflage against surfaces, resembling bird droppings when at rest. Adults are active from May through mid-August in western Europe, with flight timing varying across its range. Larvae feed on a diverse range of woody plants including honeysuckle, Vaccinium, pine, and birch.
Otites
Otites is a genus of picture-winged flies in the family Ulidiidae, established by Latreille in 1804. The genus contains approximately 30 described species distributed across Europe, Asia, and North America. Species are characterized by distinctive wing patterns typical of ulidiid flies. Two recently described species from Israel and Cyprus exhibit unusual male terminalia and extended copulation duration compared to other Otitini.
Oxycera
soldier flies
Oxycera is a genus of soldier flies (family Stratiomyidae) comprising approximately 80 described species distributed across the Palearctic, Afrotropical, and Oriental regions. Species within this genus are associated with wetland habitats, where larvae develop in shallow water or moist substrates. Several species have shown recent range expansions, potentially linked to climate change. The genus is taxonomically well-established within the tribe Oxycerini and serves as a subject of ongoing distributional and ecological research.
Oxyna
Oxyna is a genus of tephritid fruit flies (Tephritidae) comprising at least 20 described species. Members of this genus are associated with Asteraceae host plants, with some species studied for their potential as biological control agents against invasive weeds. The genus has been documented in northern Europe including Denmark, Norway, and Sweden.
Oxypoda acuminata
Oxypoda acuminata is a species of rove beetle in the family Staphylinidae, subfamily Aleocharinae. It is a small, inconspicuous beetle with a Palearctic distribution, recorded across much of Europe and extending into Russia and parts of the Caucasus. The species is one of many in the large genus Oxypoda, which contains over 300 described species. Like other aleocharine rove beetles, it is likely associated with decaying organic matter and soil habitats, though specific ecological details remain poorly documented.
Ozirhincus
Ozirhincus is a Palearctic genus of gall midges (family Cecidomyiidae) characterized by elongated rostra. Larvae develop within seeds of Asteraceae plants, making them seed-feeding specialists rather than typical gall-formers. The genus was revised in 2015 using both morphological and molecular data, clarifying species boundaries and relationships. Adults are small, delicate flies with distinctive elongated mouthparts adapted for accessing seed tissues.
Ozirhincus millefolii
A gall midge in the family Cecidomyiidae. The species name 'millefolii' indicates association with Achillea millefolium (yarrow), a common host plant for this genus. Larvae develop within flower heads, inducing galls. Adults are small, delicate flies typical of the family.
Pachybrachius
dirt-colored seed bugs
Pachybrachius is a genus of dirt-colored seed bugs in the family Rhyparochromidae, established by Hahn in 1826. The genus comprises 11 described species distributed across the Palearctic region, with records from northern Europe and Sweden. Members of this genus are part of the tribe Myodochini within the subfamily Rhyparochrominae. As true bugs in the order Hemiptera, they possess piercing-sucking mouthparts characteristic of the group.
Pachybrachius luridus
sphagnum groundbug, dirt-colored seed bug
Pachybrachius luridus is a species of dirt-colored seed bug in the family Rhyparochromidae. It has a broad distribution spanning Europe, Northern Asia (excluding China), North America, and Southern Asia. The species is commonly known as the sphagnum groundbug, suggesting an association with peat-forming wetland habitats.
Papestra biren
Glaucous Shears, Glaucous Shears Moth
Papestra biren, commonly known as the glaucous shears, is a noctuid moth with a wingspan of 30–38 mm. The species was first described by Goeze in 1781 and exhibits notable color variation across its range, including purplish-grey, ashy-grey, and dark ruddy-grey forms. Adults are active from May to July in a single annual generation. The species has a broad Palearctic distribution and was introduced to North America in 1935, where it has since expanded southward from Newfoundland.
Paradelphacodes litoralis
Paradelphacodes litoralis is a species of planthopper in the family Delphacidae, first described by Reuter in 1880 under the basionym Delphacodes litoralis. It belongs to the diverse group of true bugs within the order Hemiptera. The species has been recorded across a broad geographic range spanning northern Eurasia and North America, including the Amur region, Buryatia, Khabarovsk, England, and British Columbia.
Paradromius
Paradromius is a genus of ground beetles (family Carabidae) comprising more than 20 described species. The genus was established by Fowler in 1887 and is classified within the subfamily Lebiinae, tribe Lebiini. Species occur across North Africa, the Palearctic, and the Middle East, with notable diversity on the Canary Islands and in Morocco.
Paramacronychiinae
Paramacronychiinae is a subfamily of flesh flies within the family Sarcophagidae. The subfamily contains 23 genera and at least 32 species in China alone. Members include necrophagous species and some that cause myiasis in mammals. The group has been studied for forensic entomology applications due to carrion associations.
Paranthrene tabaniformis
dusky clearwing, dusky clearwing moth, poplar clearwing moth
Paranthrene tabaniformis, the dusky clearwing moth, is a sesiid moth native to the Palearctic and Nearctic realms. The species exhibits Batesian mimicry of wasps, with transparent wings and wasp-like coloration. Adults are active from May to August, with flight activity varying by location. The larvae are wood-borers that develop through 6-7 instars, feeding internally on poplar, willow, and sea-buckthorn before pupating in chambers within larval galleries.
Parastichtis suspecta
Suspected, Suspected Moth
Parastichtis suspecta, commonly known as the suspected or suspected moth, is a noctuid moth with broad distribution across the Palearctic and North America. Adults are highly variable in coloration, ranging from pale grey to rich reddish-brown or nearly black forms. The species has a single annual generation in Europe, with adults active in late summer. Larvae are specialized feeders on willow species, with a distinctive life cycle involving overwintering as eggs and pupation underground.
Parectecephala maculiceps
Parectecephala maculiceps is a species of frit fly in the family Chloropidae, described by Becker in 1912. The genus Parectecephala comprises small flies associated with grassland and wetland habitats. This species is poorly documented, with only two observations recorded on iNaturalist. Like other chloropids, it likely has a close ecological association with grasses or sedges.
Patrobus
Patrobus is a genus of ground beetles (Carabidae) comprising more than 20 described species. The genus is distributed across the Palearctic and Nearctic regions. At least one species, Patrobus atrorufus, has been studied for its life cycle and seasonal activity patterns, showing flexibility in breeding timing in response to climatic conditions. Members of this genus have been recorded in agricultural studies as part of carabid communities sensitive to soil management practices.
Pegomya betae
Beet Leafminer
Pegomya betae is a leaf-mining fly in the family Anthomyiidae, commonly known as the Beet Leafminer. The species is native to the Palearctic region and has been introduced to North America. Larvae feed internally in leaves of beet plants, creating distinctive mines. It is considered a significant agricultural pest of sugar beet and related crops.
Peltastica
tooth-necked fungus beetles
Peltastica is a genus of small beetles in the family Derodontidae, commonly referred to as tooth-necked fungus beetles. The genus was established by Mannerheim in 1852 and includes at least two described species: P. tuberculata and P. amurensis. These beetles belong to the subfamily Peltasticinae and are associated with fungal habitats. The genus is rarely encountered and poorly known biologically.
Penichroa fasciata
Penichroa fasciata is a species of longhorn beetle in the family Cerambycidae, subfamily Cerambycinae, and tribe Graciliini. It was described by Stephens in 1831. The species has a broad distribution spanning Europe and northern Asia (excluding China) as well as North America, though specific details of its biology and ecology remain poorly documented in the available literature.
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.
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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flavipes
Phaenopsectra flavipes is a non-biting midge in the family Chironomidae. It occurs across the Palearctic region, with records from Scandinavia, Denmark, and Slovakia. The species has been documented in pond habitats. As with other chironomids, adults are short-lived and do not feed.
Pheosia
Pheosia is a Palearctic genus of prominent moths in the family Notodontidae. The genus includes several species, with Pheosia gnoma (Lesser Swallow Prominent) and Pheosia tremula (Swallow Prominent) being the most well-documented. Species within this genus are distinguished by characteristic wing patterns and larval host plant associations with woody plants.
Pherbellia nana
Pherbellia nana is a minute species of marsh fly in the family Sciomyzidae, measuring approximately 3 mm in length. It is distributed across the Palearctic region, with confirmed records from Denmark, Norway, and Sweden. The species has been included in molecular barcode studies to help clarify phylogenetic relationships within the genus.
Pherbellia schoenherri
Spot-winged Little Snailkiller
Pherbellia schoenherri is a small snail-killing fly in the family Sciomyzidae, distributed across the Palearctic region. Adults measure 4–5 mm and exhibit distinctive wing patterning with spinules on the costal vein. The species is notable for its specialized parasitoid life history: females oviposit on the shells of amber snails (Succineidae), particularly Succinea putris, and the larvae consume the host animal before pupating within the shell. It is among the most common and widespread Sciomyzidae in Europe, with an exceptionally long flight period spanning most of the year.
Philodromus rufus quartus
Philodromus rufus quartus is a subspecies of running crab spider described by Dondale & Redner in 1968. It belongs to the family Philodromidae, a group of active hunters that do not build webs to capture prey. The subspecies is distributed across a broad Palearctic range including France, Korea, and parts of Russia and Central Asia. As a member of the Philodromus rufus species complex, it exhibits the characteristic laterigrade leg posture and flattened body form typical of bark-dwelling crab spiders.
Philonthus caeruleipennis
Blue-winged Rove Beetle
A medium-sized rove beetle with striking metallic blue-green elytra contrasting against a black body. It is predatory, hunting other insects in fungal and decaying organic matter habitats. The species occurs across northern North America and parts of Eurasia.
Philonthus concinnus
Philonthus concinnus is a rove beetle in the family Staphylinidae, first described by Gravenhorst in 1802. The genus Philonthus is a large and diverse group of predatory rove beetles, though specific ecological details for P. concinnus remain poorly documented in available sources. The species has a broad distribution spanning Europe, North Africa, the Middle East, Central Asia, and parts of East Asia, and has been introduced to North America where it is now established in Canada and the United States. Like other members of its genus, it is presumed to be predatory, but direct observations of its biology are sparse.
Philonthus debilis
Philonthus debilis is a rove beetle in the family Staphylinidae. As a member of the genus Philonthus, it belongs to a diverse group of predatory beetles commonly associated with carrion, dung, and other decomposing organic matter. The species has been recorded across a broad geographic range spanning the Palearctic region and has been introduced to North America. Like other Philonthus species, it likely plays a role in carrion succession as a predator on fly larvae and other small insects.
Philonthus sanguinolentus
A medium-sized rove beetle in the genus Philonthus, characterized by dark coloration with reddish or blood-red markings that give the species its name. Like other members of Staphylinidae, it exhibits the family's distinctive short elytra that leave much of the abdomen exposed. The species has a Palearctic native distribution but has been introduced to North America, where it is established in the Pacific Northwest and parts of Canada.
Phloeocharis
Phloeocharis is a genus of rove beetles in the subfamily Phloeocharinae. Species in this genus are saproxylic, living under tree bark in association with bark beetle communities. The genus is native to the Palearctic region, with at least one species, Phloeocharis subtilissima, introduced to North America via port cities.
Photedes
Photedes is a genus of owlet moths in the family Noctuidae, established by Lederer in 1857. The genus contains approximately 17 described species distributed primarily across the Palearctic region, with some representation in North America. At least one species, Photedes minima (Small Dotted Buff), has been subject to genomic study, revealing a chromosome count of 31 (30 autosomes plus Z chromosome). Species in this genus are generally small to medium-sized moths associated with moist habitats.
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.
Phthiracarus
Phthiracarus is the second largest genus of ptyctimous mites (Euptyctima), with nearly cosmopolitan distribution. The genus belongs to the family Phthiracaridae within the oribatid mites (Oribatida), a diverse group of soil-dwelling arachnids. Species in this genus are primarily found in temperate forest soils and are associated with decomposition processes. Recent taxonomic work has described new species from previously understudied regions including Northeast China.
Phygadeuontinae
Darwin wasps
Phygadeuontinae is a subfamily of Darwin wasps within Ichneumonidae, comprising numerous genera including Atractodes, Chirotica, Gelis, Lochetica, and others. The subfamily exhibits cosmopolitan distribution with substantial diversity in the Neotropics, Europe, and Asia Minor. Members are primarily parasitoids with varied host associations including Lepidoptera (Psychidae), Coleoptera (Chrysomelidae), and other insects. The genus Gelis includes at least one documented endoparasitoid of insect eggs, representing an unusual life history strategy for ichneumonids.
Phyllobiini
Phyllobiini is a tribe of broad-nosed weevils within the subfamily Entiminae (Curculionidae). The tribe contains approximately 30 genera distributed primarily in the Palearctic region, with notable diversity in the Mediterranean basin. Members are characterized by features of the rostrum and antennae, though specific diagnostic traits vary among constituent genera. The tribe includes the genus Phyllobius, from which the tribe derives its name.
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.
Phylloporia bistrigella
Striped Bright
A small moth in the family Incurvariidae with a wingspan of 7–9 mm. Recognizable by two whitish fasciae on the forewings. The larvae are leaf miners on birch species.
Phymatura
Phymatura is a genus of rove beetles (Staphylinidae) in the subfamily Aleocharinae, tribe Homalotini, subtribe Bolitocharina. The genus was erected by Sahlberg in 1876. At least five species are now recognized globally, including P. blanchardi, P. brevicollis, P. japonica, and P. russa. Taxonomic boundaries within the genus remain problematic and require further study, including DNA analysis.
Phytoliriomyza dorsata
Phytoliriomyza dorsata is a species of leaf-miner fly in the family Agromyzidae. It is a small dipteran with wing lengths ranging from 1.9–2.6 mm. The species has a broad distribution across the Palearctic region, with records from Europe, Russia, Iran, and Japan, and has also been reported in North America where it may be introduced.
Phytomyza crassiseta
Phytomyza crassiseta is a species of leaf-mining fly in the family Agromyzidae. The genus Phytomyza contains numerous species whose larvae feed internally within leaves, creating distinctive serpentine mines. Specific biological details for P. crassiseta are limited in available sources. Many Phytomyza species are host-specific to particular plant genera or families.
Phytomyza ranunculi
Ranunculus leaf-mining fly
Phytomyza ranunculi is a leaf-mining fly in the family Agromyzidae that develops within leaves of Ranunculus plants (buttercups). Adults are approximately 2 mm long and highly variable in coloration, with several named color variants. The larvae are primarily leaf-miners, forming long, conspicuous white mines with frass arranged in close strings. The species is widespread in Europe and occurs in the Palearctic region. Pupae are heavily parasitized, with up to 75% of puparia attacked by parasitoid wasps.