Palearctic
Guides
Abia
Honeysuckle Sawflies and Allies
Abia is a genus of sawflies in the family Cimbicidae. These are stout-bodied insects commonly encountered in Europe. Species in this genus were formerly placed in the genus Zaraea, which is now considered a synonym. The genus includes several species that feed on conifers and honeysuckles.
Acalypta parvula
moss lacebug
Acalypta parvula is a species of lace bug in the family Tingidae, commonly known as the moss lacebug. It is a small true bug with a widespread distribution spanning Africa, Europe, Northern Asia (excluding China), and North America. The species was originally described as Tingis parvula by Fallén in 1807. Records from the Azores (Faial, Flores, Pico, São Miguel, Terceira) indicate established populations on Atlantic islands.
Acanthogethes
pollen beetles
Acanthogethes is a genus of pollen beetles in the family Nitidulidae, established by Reitter in 1871. The genus contains five described species distributed in the Palearctic region. These small beetles are associated with flowers and pollen, a characteristic trait of their family.
Achorotile
Achorotile is a genus of planthoppers in the family Delphacidae, first described by Fieber in 1866. The genus comprises at least 15 described species distributed across Europe and North America. As with other delphacids, members of this genus are small, sap-feeding insects associated with grasses and sedges. The genus has been documented from subarctic regions to temperate zones, with several species described from the western United States and Canada.
Achorotile transbaicalica
Achorotile transbaicalica is a species of planthopper in the family Delphacidae, described by Kusnezov in 1929. It belongs to a genus of small, grass-associated delphacids found primarily in northern Palearctic regions. The species is known from scattered records across northern Mongolia and eastern Russia, including the Transbaikal region from which its epithet derives.
Acinia
Acinia is a genus of tephritid fruit flies in the family Tephritidae. The genus comprises approximately 13 described species distributed primarily in the Palearctic and Nearctic regions. At least one species, Acinia picturata, has been documented in association with plants in the Asteraceae family.
Acleris variegana
Garden Rose Tortrix, Garden Rose Tortricid, Fruit Tortricid
A small tortricid moth with distinctive wing patterning, recognized as a significant agricultural pest of rosaceous fruit trees. Adults fly nocturnally during late summer and are attracted to light. The species has a broad Palearctic distribution with introduced populations in North America. Larval damage is most severe from the spring generation, which attacks fruit buds, flowers, and developing fruits.
Acrosathe
Acrosathe is a genus of stiletto flies (family Therevidae) comprising more than 20 described species. The genus was established by Irwin and Lyneborg in 1981 and belongs to the subfamily Therevinae. Six species are documented from the Nearctic Region, including the type species and one newly described species (A. falcata). Species-level taxonomy has been revised with morphological descriptions, genitalia illustrations, and distribution mapping.
Actenoptera
Actenoptera is a genus of small flies in the family Piophilidae, established by Czerny in 1904. Members of this genus are part of the cheese skipper family, a group known for larval development in protein-rich substrates. The genus appears to be poorly studied, with limited published information on species diversity and biology.
Adalia
ladybugs, lady beetles, ladybirds
Adalia is a genus of lady beetles (Coccinellidae) containing two species: A. bipunctata (two-spot ladybird) and A. decempunctata (ten-spot ladybird). These beetles are aphid predators found across the Palearctic region. Both species exhibit color pattern polymorphism and possess alkaloid chemical defenses. A. bipunctata is known to harbor multiple male-killing symbionts including Wolbachia, Rickettsia, and Spiroplasma, though symbiont phenotypes vary geographically.
Aelia
shield bug
Aelia is a genus of shield bugs (family Pentatomidae) in the tribe Aelini. These true bugs (Hemiptera) are characterized by their shield-shaped bodies. The genus is well-documented with over 11,000 observations on iNaturalist, indicating widespread recognition among naturalists. Aelia species are associated with grassland and agricultural habitats.
Aethes deutschiana
Aethes deutschiana is a small tortricid moth first described by Zetterstedt in 1839. It belongs to the genus Aethes, a group of moths commonly known as false bell moths or flat-bodied moths. The species has a notably broad geographic range spanning the Palearctic region and extending to North America, suggesting either natural dispersal capabilities or possible human-mediated introduction to the Nearctic.
Agabus anthracinus
Agabus anthracinus is a species of predaceous diving beetle in the family Dytiscidae. It is widespread across northern North America, ranging from the northern United States through Canada to Alaska. Records also indicate presence in Europe and Northern Asia. The species is accepted and documented in major taxonomic databases, though detailed biological studies remain limited.
Aglais urticae
Small Tortoiseshell
Aglais urticae, commonly known as the Small Tortoiseshell, is a widespread Eurasian butterfly in the family Nymphalidae. It is one of the most familiar butterflies across Europe, recognized by its distinctive orange and black wing pattern with blue marginal spots. The species is strongly associated with nettle patches, which serve as the primary larval foodplant. Adults are frequently observed in gardens, meadows, and woodland edges, and are known for their territorial behavior and extended hibernation as adults.
Agonopterix
flat-body moths
Agonopterix is a genus of small moths in the family Depressariidae, superfamily Gelechioidea. Species are commonly known as "flat-body moths" due to their characteristic flattened resting posture. The genus exhibits considerable cryptic diversity, particularly in Mediterranean and temperate regions, with many species distinguished by subtle differences in wing pattern and genitalia structure. Several species have been studied for their specialized host plant relationships, including some with potential as biological control agents.
Agonum muelleri
Müller's Harp Ground Beetle
Agonum muelleri is a ground beetle species in the family Carabidae, widespread across the Palearctic, Nearctic, and Near East regions. It is notably abundant in agricultural landscapes, particularly soybean fields, where it functions as an active predator of pest insects. The species exhibits atypical behavior for a ground beetle by readily climbing vegetation to hunt prey. Two subspecies are recognized: A. muelleri muelleri and A. muelleri unicolor.
Agrilus obsoletoguttatus
Beech Borer
Agrilus obsoletoguttatus is a small metallic wood-boring beetle in the family Buprestidae, native to North America. It is among the smallest jewel beetle species utilized as prey by the specialist predatory wasp Cerceris fumipennis, which provisions its underground nests with paralyzed buprestid beetles. The species has been documented in nest caches containing up to 13 individuals, reflecting its small size relative to larger buprestid prey.
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straminella
Pearl Veneer, Straw Grass-veneer moth
Agriphila straminella is a small crambid moth with a wingspan of 16–20 mm, found across Europe and the Palearctic region. Adults are active from June to September, with flight timing varying by location. The species is attracted to light traps. Larvae feed on grasses including sheep's fescue, smooth meadowgrass, and wheat.
Agroeca
Agroeca is a genus of liocranid sac spiders first described by Niklas Westring in 1861. The genus contains 35 recognized species distributed across Africa, Asia, Europe, North America, and South America. Species in this genus are ground-dwelling hunters with nocturnal activity patterns. The genus shows a notably broad geographic distribution, with multiple species endemic to East Asia.
Agrypnus
Agrypnus is a genus of click beetles (Elateridae) in the subfamily Agrypninae. The genus includes species with Palearctic distribution, with some members inhabiting diverse environments from scrubland and grasslands to coastal sand dunes. Larvae of at least some species are soil-dwelling wireworms that feed on plant roots and other insects. One species, Agrypnus murinus, has been subject to genome sequencing and is recognized as an agricultural pest.
Aguriahana stellulata
Cherry Leafhopper
Aguriahana stellulata is a species of leafhopper in the family Cicadellidae, commonly known as the Cherry Leafhopper. It belongs to the subfamily Typhlocybinae, a group characterized by small size and often intricate wing patterning. The species has been documented across Europe and North America, with additional records from parts of Russia.
Aleochara lata
Large Minute Rove Beetle
Aleochara lata is a species of rove beetle in the family Staphylinidae. It belongs to the subgenus Aleochara Gravenhorst, a group of parasitoid rove beetles. The species is native to the Palearctic region and has been introduced to North America.
Alopecosa aculeata
Spinyrib Wolf Spider
Alopecosa aculeata is a species of wolf spider in the family Lycosidae, found across a broad geographic range spanning North America, Europe, and Asia. Taxonomic study has revealed that specimens historically identified as this species actually represent two distinct species, with A. aculeata and A. taeniata now recognized as separate based on morphological, behavioral, and ecological differences. The species exhibits distinct courtship behavior and habitat preferences that differ from its close relatives.
Alopecosa exasperans
Alopecosa exasperans is a wolf spider in the family Lycosidae. It forms part of the albostriata species group alongside A. albostriata and A. mutabilis, a group distributed across Siberia and the northern Nearctic. The species has been recorded in Canada and Greenland. Taxonomic research suggests this species group may eventually be transferred to the genus Mustelicosa based on male palp morphology.
Amblyonychus trapezoidalis
Green-eyed Lion Fly
Amblyonychus trapezoidalis is a species of robber fly (Asilidae) originally described from Italy in 1861. It is known by the common name "Green-eyed Lion Fly" and has been documented in at least 15 iNaturalist observations. The species belongs to a genus of predatory flies characterized by robust bodies and strong predatory habits.
Amblytylus
Amblytylus is a genus of plant bugs in the family Miridae, established by Fieber in 1858. The genus contains at least two described species: Amblytylus albidus and Amblytylus nasutus. Members of this genus are classified within the suborder Heteroptera (true bugs) and are part of the diverse mirid fauna found in the Palearctic region.
Ameletidae
combmouthed minnow mayflies
Ameletidae is a family of mayflies commonly known as combmouthed minnow mayflies. The family includes the speciose genus Ameletus, which reaches its greatest diversity in southwestern North America with up to 12 species co-occurring at single sites. The genus Metreletus has a trans-Palaearctic distribution with three recognized species. Ameletidae larvae are aquatic and occur in lotic habitats from small headwater streams to larger rivers.
Ametastegia glabrata
Dock Sawfly, Dock False-worm
Ametastegia glabrata, commonly known as the dock sawfly or dock false-worm, is a tenthredinid sawfly native to the Palearctic region. The species has been introduced to Australia, where it was first recorded in Victoria attacking raspberries. It is associated with Rumex species (dock and sorrel) as host plants.
Amphorophora ampullata
Dark-tipped Fern Aphid
Amphorophora ampullata is a species of aphid in the family Aphididae, commonly known as the Dark-tipped Fern Aphid. It belongs to a genus associated with fern-feeding habits. The species has been recorded in northern Europe and North America. Taxonomic status varies across databases, with some treating it as accepted and others as a synonym.
Anapus
A genus of plant bugs in the family Miridae. Species identification is challenging due to significant intraspecific polymorphism in coloration and body proportions. Male genitalia, particularly the aedeagus, provide reliable diagnostic characters for species delimitation. The genus is Palearctic in distribution.
Anchomenus
Anchomenus is a genus of ground beetles (Carabidae) established by Bonelli in 1810. The genus is distributed across the Palearctic region, including Europe, the Near East, and North Africa, with 18 extant species and two fossil species. One species, Anchomenus dorsalis, has been studied as a climate change indicator due to its sensitivity to temperature and precipitation variables.
Ancylis tineana
Rannoch Roller
Ancylis tineana is a small tortricid moth with a wingspan of 11–15 mm. It has a broad distribution across the Palearctic, from southern Sweden through Asia Minor, the Trans-Caucasus, Siberia, and eastern Russia, with introduced populations in North America. In Europe, it produces two generations annually. The species is known to feed on a range of woody plants and can occasionally become a minor pest in orchards.
Ancylis uncella
Bridge Roller
Ancylis uncella is a small tortricid moth with a Holarctic distribution spanning the Palearctic region and North America. First described from the Vienna area in 1775, it has been recorded across Europe and was recently confirmed from China. The species is distinguished by reddish-brown forewings with grey dorsal spots and light costal lines. Larvae feed on birch and heather.
Anommatus duodecimstriatus
Anommatus duodecimstriatus is a small beetle species in the family Teredidae (formerly placed in Bothrideridae), distributed across the Palearctic region with confirmed records from the Azores. The species has been used as a comparative taxon in identification keys for congeneric species.
Anterastria
A small genus of noctuid moths established by Japanese lepidopterist Shigero Sugi in 1982. The genus comprises two disjunct species with remarkably different geographic ranges: one Palearctic species distributed across south-eastern Siberia, Korea, and Japan, and one Nearctic species found in Tennessee, United States.
Anthaxia
Anthaxia is a large genus of jewel beetles (family Buprestidae, tribe Anthaxiini) containing numerous species distributed across the Palearctic, Nearctic, Afrotropical, and Indomalayan regions. The genus is divided into seven subgenera: Anthaxia (Anthaxia), Haplanthaxia, Melanthaxia, Cratomerus, Merocratus, Thailandia, and Richteraxia. Species are primarily associated with woody host plants, with larvae developing in dead branches or living stems of various trees and shrubs. Adults are frequently observed visiting flowers, where they feed on pollen and nectar.
Apamea remissa
Dusky Brocade
Apamea remissa, commonly known as the dusky brocade, is a noctuid moth species with a wingspan of 36–42 mm. It occurs across the Palearctic region from Europe through Siberia to Japan, with disjunct populations in Alaska. The species exhibits considerable variation in wing markings, making identification challenging in some forms.
Apareophora
Apareophora is a genus of sawflies in the family Tenthredinidae, established by Sato in 1928. Members of this genus are part of the diverse sawfly fauna of the Palearctic region. The genus is characterized by morphological features typical of the subfamily Blennocampinae, including specific arrangements of antennal segments and wing venation patterns. Species within Apareophora are herbivorous as larvae, feeding on various host plants.
Apertochrysa
Apertochrysa is a genus of green lacewings in the family Chrysopidae, comprising 183 described species. The genus has undergone substantial taxonomic revision, having been previously classified under the names Navasius, Dichochrysa, and Pseudomallada before being synonymized under Apertochrysa in 2021. It is a subcosmopolitan genus with the majority of species distributed in the Palearctic region, particularly Asia and Africa. Species in this genus are predators of soft-bodied insects and some exhibit debris-carrying behavior as larvae.
Aphrophora salicina
Willow Spittlebug
Aphrophora salicina, commonly known as the Willow Spittlebug, is a species of froghopper in the family Aphrophoridae. The species was first described by Goeze in 1778. It belongs to a genus commonly referred to as conifer spittlebugs, though this particular species is associated with willow. The taxonomy of the family has been debated, with some authorities placing the genus in Cercopidae and others in Aphrophoridae. The species has been recorded across parts of Europe and Asia, with distribution records from regions including Abruzzo, Altay, Amur, Ankara, and Aqtöbe.
Apiloscatopse
Apiloscatopse is a genus of minute black scavenger flies in the family Scatopsidae, established by Cook in 1974. The genus is characterized by distinctive morphological features of the scutellum. It is known from the Palearctic region with confirmed records from Denmark, Norway, and Sweden. The type species, Apiloscatopse scutellata, serves as the primary reference for understanding the genus.
Aplocera
treble-bar moths
Aplocera is a genus of geometer moths in the family Geometridae, subfamily Larentiinae, comprising approximately 30 described species distributed across the Palearctic region. The genus includes several well-known species such as Aplocera plagiata (treble-bar), Aplocera praeformata (purple treble-bar), and Aplocera efformata (lesser treble-bar). These moths are characterized by distinctive wing patterns with transverse dark bands, giving rise to their common name. Several species are declining in parts of Europe due to habitat loss.
Aplocera plagiata
Treble Bar, St. John's Wort Inchworm
Aplocera plagiata, commonly known as the Treble Bar or St. John's Wort Inchworm, is a moth in the family Geometridae. It occurs throughout the Palearctic region and the Near East, with introduced populations in North America. The species is associated with St. John's wort (Hypericum) as a larval host plant. Adults are active during summer months and are readily recognized by their distinctive wing pattern.
Aplomerus
A small genus of parasitoid wasps in the subfamily Xoridinae (Ichneumonidae). The genus exhibits a disjunct distribution across North America, Japan, and southeast Asia. Eight species are currently recognized, including two described from the Oriental region (Thailand and Vietnam) and one from Japan. Aplomerus is considered a basal lineage within Xoridinae.
Aradus signaticornis
Flat bug
Aradus signaticornis is a species of flat bug in the family Aradidae, first described by Sahlberg in 1848. As a member of the Aradidae family, it belongs to a group of true bugs commonly associated with dead wood habitats. The species has been recorded from Europe, Northern Asia, and North America. Flat bugs in this genus are typically found under bark and in decaying wood, where they feed on fungal hyphae.
Araniella
Cucumber Spiders, Sixspotted Orbweaver
Araniella is a genus of small orb-weaver spiders in the family Araneidae, first described in 1942. The genus includes approximately 20 recognized species distributed across the Palearctic and Nearctic regions, with notable species including A. cucurbitina (cucumber green spider) and A. displicata (sixspotted orbweaver). Members are characterized by green coloration due to biliverdin pigments, small body size (4–8 mm), and distinctive abdominal spotting patterns. Several species have been described recently, including A. villanii (2020) named after mathematician Cédric Villani.
Archips oporana
pine tortrix, spruce tortrix
Archips oporana is a tortricid moth commonly known as the pine tortrix or spruce tortrix. First described by Carl Linnaeus in 1758, this species is found across Europe and parts of Asia including China, Korea, Japan, and Russia. The larvae are significant forestry pests, feeding on conifer needles and shoots of multiple host tree species. Adults are active primarily in late spring and summer, with a partial second generation in some regions.
Archips rosana
Rose Tortrix, Rose Tortrix Moth, Rose Leaf Roller
Archips rosana, the rose tortrix moth, is a leafroller moth in the family Tortricidae distributed across the Palearctic and Nearctic realms. The species is a significant agricultural pest of apple orchards and other fruit crops, with larvae feeding within rolled leaves. Adults are active from May to August, with specific timing varying by location. The species is subject to substantial biological control by parasitoid wasps, with parasitisation rates reaching 24-40% in some populations.
Archips xylosteana
variegated golden tortrix, brown oak tortrix
Archips xylosteana is a medium-sized tortricid moth native to the Palearctic region, with a wingspan of 14–23 mm. The species exhibits distinct sexual dimorphism in size, with females typically larger than males. Forewings are broad and roughly rectangular, displaying variable coloration from yellow-brown to pinkish brown with dark reddish-brown markings. This univoltine species is a polyphagous leafroller, with larvae feeding on numerous deciduous trees and shrubs.
Arthroceras
Arthroceras is a genus of snipe flies (family Rhagionidae) established by Williston in 1886. It is the sole genus in the subfamily Arthrocerinae. Species range from 4.5 to 13 mm in body length and occur in both the Palearctic and Neotropical regions.