Transcontinental-distribution
Guides
Aaroniella badonneli
loving barklouse
Aaroniella badonneli is a species of barklouse in the family Philotarsidae. It is a small psocopteran with sexual dimorphism in body size. The species is named after French entomologist André Badonnel. It has a transcontinental distribution spanning Europe, northern Asia, and North America.
Acronicta grisea
Gray Dagger
Acronicta grisea, commonly known as the gray dagger, is a noctuid moth species first described by Francis Walker in 1856. It occurs across southern Canada and the northern United States, with a wingspan of 30–40 mm. Adults are active in midsummer.
Acronicta vulpina
vulpina dagger moth, miller dagger moth
Acronicta vulpina is a noctuid moth found across northern and western North America. Adults fly from May to July with a wingspan of 40–47 mm. The larvae feed on several deciduous tree species including aspen, birch, balsam poplar, and willow. The species was formerly considered a subspecies of the European Acronicta leporina.
Aculepeira packardi
Northern Orbweaver
Aculepeira packardi is an orb-weaving spider in the family Araneidae, commonly known as the Northern Orbweaver. The species has a broad transcontinental distribution spanning North America and Eurasia. It constructs characteristic spiral wheel-shaped webs to capture prey. The species was first described by Thorell in 1875 under the basionym Epeira packardii.
Alypia langtoni
Langton's Forester, Six-spotted Forester
Alypia langtoni, known as Langton's Forester or the Six-spotted Forester, is a diurnal moth in the family Noctuidae. First described by William Couper in 1865, this species exhibits sexual dimorphism in wing spotting pattern. Males possess eight white spots on black wings, while females have six. The species has a broad transcontinental distribution across North America, with larvae that feed on fireweed (Chamaenerion species). Adults are active during daylight hours, an unusual trait among noctuids.
Amplicephalus nebulosus
Amplicephalus nebulosus is a leafhopper species in the family Cicadellidae, originally described as Endria nebulosa by Ball in 1900. It is currently treated as a synonym of Endria nebulosa in major taxonomic databases. The species has been recorded from both North America (Colorado) and parts of Asia (Buryat, Chita, Chuvash, Hentiy regions), indicating a transcontinental distribution. As a member of the subfamily Deltocephalinae, it belongs to a large and diverse group of leafhoppers with varied host plant associations.
Araniella displicata
sixspotted orbweaver, six-spotted orbweaver
Araniella displicata, commonly known as the sixspotted orbweaver, is a small orb-weaving spider in the family Araneidae. It is one of the most widely distributed arachnids in North America, with additional populations across Europe and Asia. Adults are notably small—females reach only 4–8 mm in body length, males 4–6 mm—and are frequently mistaken for juvenile orb weavers due to their diminutive size. The species constructs compact orb webs, often spanning single leaves, and displays considerable color variation including yellow, white, and rust red.
Bembidion gebleri
Bembidion gebleri is a ground beetle in the family Carabidae, described by Gebler in 1833. It belongs to the large genus Bembidion, which contains numerous small predatory beetles commonly found near water or in moist habitats. The species has been recorded across northern Asia and parts of North America.
Boloria selene
Small Pearl-bordered Fritillary, Eurasian Silver-bordered Fritillary, Silver-bordered Fritillary
Boloria selene is a medium-sized fritillary butterfly with a trans-Eurasian and North American distribution. The species exhibits complex population dynamics including bivoltine life cycles with distinct behavioral and developmental differences between spring and summer generations. In Europe it is known as the small pearl-bordered fritillary; in North America it is called the silver-bordered fritillary. The species serves as a grassland habitat indicator and has been extensively studied in the context of conservation management including prescribed fire and grazing regimes.
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augustinus
Brown Elfin, Western Elfin (subspecies iroides)
Callophrys augustinus, the brown elfin, is a small lycaenid butterfly with a wingspan of 22–29 mm. Adults are active in a single generation from early May to early June. The species is univoltine with pupal hibernation. Larvae feed on Ericaceae species in eastern North America and a broader range of host plants in western populations.
Clambus armadillo
Clambus armadillo is a minute beetle species in the family Clambidae, a group of small beetles often associated with decaying organic matter. The species has a transcontinental distribution spanning Europe, Northern Asia (excluding China), and North America. Like other clambid beetles, it is likely associated with moist microhabitats where it feeds on fungal hyphae or decaying plant material, though specific ecological details remain poorly documented.
Clambus pubescens
Clambus pubescens is a small beetle species in the family Clambidae, a group commonly known as minute beetles or fringe-winged beetles. The species has a transcontinental distribution spanning Europe, Northern Asia (excluding China), and North America. Like other members of Clambidae, it is characterized by its diminutive size and reduced wing venation with long marginal setae. The family Clambidae is a small but ancient lineage of polyphagan beetles with fossil records extending to the Cretaceous period.
Clubiona norvegica
Clubiona norvegica is a sac spider in the family Clubionidae, first described by Embrik Strand in 1900. The species has a transcontinental distribution spanning North America, Europe, and European Russia. Like other members of its genus, it constructs silken retreats rather than prey-capture webs and hunts actively for small arthropods.
Criomorphus inconspicuus
Criomorphus inconspicuus is a species of delphacid planthopper in the family Delphacidae. It was described by Uhler in 1877. The species is found in North America, with distribution records from Alaska, Alberta, and parts of Russia (Amur, Buryat, Chuvash). As a member of the Delphacidae, it belongs to a family of planthoppers characterized by a distinctive spur on the hind tibia.
Cydnus aterrimus
Black burrowing bug
Cydnus aterrimus is a species of burrowing bug in the family Cydnidae, commonly known as the Black burrowing bug. The species has a notably broad geographic distribution spanning multiple continents including the Caribbean, Europe, Northern Asia (excluding China), North America, and Southern Asia. As a member of the burrowing bug family, it is adapted for fossorial (burrowing) habits, though specific ecological details remain poorly documented in available literature.
Drasteria adumbrata
Shadowy Arches
Drasteria adumbrata, known as the Shadowy Arches, is a small erebid moth with a wingspan of approximately 32 mm. The species exhibits a transcontinental distribution across southern Canada and the northern United States, with two recognized subspecies occupying distinct eastern and western ranges. Adults are active during summer months. The species was first described by Hans Hermann Behr in 1870.
Drepana arcuata
Arched Hooktip Moth, masked birch caterpillar
Drepana arcuata, commonly known as the arched hooktip moth, is a North American species in the hooktip moth family Drepanidae. Adults are active from mid-May through late July, with one generation per year in northern populations. The species is notable for its larvae, which produce sounds through body vibrations, drumming, scraping mouthparts, and specialized anal structures—possibly to communicate and attract other larvae to communal silk shelters.
Elatobia montelliella
Elatobia montelliella is a small moth in the family Tineidae, described by Schantz in 1951. It has a wingspan of 16–22 mm. The species has a disjunct distribution across Finland and western North America (Alberta and Utah), though the ecological basis for this pattern remains unclear.
Erebia discoidalis
Red-disked Alpine
Erebia discoidalis, known as the red-disked alpine, is a butterfly in the subfamily Satyrinae of family Nymphalidae. It has a transcontinental distribution spanning North America and Asia, occurring in boreal and arctic-alpine habitats. The species is associated with open, acidic wetlands where its larvae feed on cottongrass (Eriophorum) species.
Ethmia bipunctella
Ethmia bipunctella is a diurnal moth in the family Depressariidae, originally described by Fabricius in 1775. The species has a broad geographic distribution spanning Central and Southern Europe, North Africa, Asia, and northeastern North America. It is bivoltine, producing two generations per year with adult flight activity from May through September. The species was formerly considered to include E. iranella as a subspecies, but this taxon is now recognized as distinct.
Euxoa albipennis
White-striped Dart
Euxoa albipennis is a noctuid moth first described by Augustus Radcliffe Grote in 1876. It is distributed across southern Canada and the northern United States, with western populations extending to New Mexico, Arizona, and California. The species has a wingspan of 30–35 mm. Larval host plants include Oxytropis, Lupinus, Melilotus, Helianthus, Solanum tuberosum, and Zea mays.
Harpalus amputatus
Harpalus amputatus is a ground beetle species in the family Carabidae, described by Thomas Say in 1830. It belongs to the subfamily Harpalinae and is one of numerous species in the large genus Harpalus. The species exhibits a transcontinental distribution spanning northern Asia and North America, with recognized subspecies in Russia, China, Mongolia, and North America. Like other Harpalus species, it is a ground-dwelling beetle typically found in open, dry habitats where it hunts small invertebrates and scavenges opportunistically.
Longitarsus rubiginosus
Longitarsus rubiginosus is a flea beetle in the family Chrysomelidae, characterized by enlarged hind femora adapted for jumping. The species has a transcontinental distribution spanning Europe, Northern Asia (excluding China), and North America. First described by Foudras in 1859 as Teinodactyla rubiginosa, it belongs to the large genus Longitarsus, which contains hundreds of species primarily associated with host plants in the Asteraceae and Boraginaceae families.
Loxostege anartalis
Loxostege anartalis is a small crambid moth described by Grote in 1877. It has a transcontinental distribution across Canada and extends south to California in the western United States. The species exhibits notable geographic variation, with five recognized subspecies. Adults are active in spring and early summer, and the species is known to be a host for the mason wasp Euodynerus annulatus.
Martyringa xeraula
Himalayan Grain Moth
Martyringa xeraula, known as the Himalayan grain moth, is a small moth in the family Lecithoceridae described by Edward Meyrick in 1910. It has an unusually broad distribution spanning Asia (India, western China, Japan) and North America (southern United States from Louisiana to South Carolina). The species is associated with stored products and detritus-feeding habits. Its transcontinental range suggests either natural dispersal or human-mediated introduction, though the mechanism remains unclear.
Monopis spilotella
Orange-headed monopis
Monopis spilotella is a small tineid moth described by Tengström in 1848. The species has a transcontinental distribution spanning northern Eurasia and North America. Adults are active during the summer months with a flight period extending from May through September. The species is known by the common name Orange-headed monopis.
Oxybelus bipunctatus
square-headed wasp
A square-headed wasp in the family Crabronidae with a broad geographic distribution spanning Africa, Europe, Northern Asia (excluding China), and North America. The species exhibits seasonal variation in nesting behavior and is known to provision nests with paralyzed flies. Two subspecies are recognized: O. b. bipunctatus and O. b. thermophilus.
Pardosa hyperborea
Pardosa hyperborea is a species of thin-legged wolf spider in the family Lycosidae. It has a transcontinental distribution spanning the Nearctic and Palearctic regions, occurring in northern North America, Greenland, and across northern Eurasia from Europe to Siberia. The species inhabits high-latitude and high-elevation environments, reflecting adaptations to cold climates. Like other members of the genus Pardosa, it exhibits characteristic long leg spines and elevated cephalothorax morphology.
Parnassius eversmanni
Eversmann's parnassian
Parnassius eversmanni, or Eversmann's parnassian, is a high-altitude butterfly in the swallowtail family Papilionidae. It occurs across a broad transcontinental range spanning eastern Russia, Mongolia, Japan, Alaska, and the Yukon. The species was named in honor of Eduard Friedrich Eversmann. Like other Parnassius species, it exhibits complex wing pattern variation with numerous described subspecies and forms, making identification challenging without examination of structural characters.
Petridiobius arcticus
Arctic Bristletail
Petridiobius arcticus is a species of jumping bristletail, an ancient lineage of wingless insects belonging to the order Archaeognatha. As a member of the family Machilidae, it represents one of the most primitive insect groups, retaining characteristics of early insect evolution. The species has a broad distribution spanning multiple continents, occurring in both the Palearctic and Nearctic regions. Despite its wide geographic range, detailed biological information remains limited.
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.
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.
Porotachys bisulcatus
Porotachys bisulcatus is a small ground beetle in the family Carabidae, described by Nicolai in 1822. It belongs to the tribe Bembidiini, a diverse group of predominantly small carabids often associated with riparian and moist habitats. The species has a notably broad distribution spanning multiple continents, including North America, Europe, Africa, and temperate Asia. Its wide geographic range suggests either strong dispersal capabilities or a generalist ecological profile.
Praestigia kulczynskii
Kulczynski's Dwarf Weaver
Praestigia kulczynskii is a dwarf spider in the family Linyphiidae, described by Eskov in 1979. The species has a transcontinental distribution spanning the Palearctic and Nearctic regions, with records from Russia, Japan, and Canada. As a member of the sheet-web weavers, it belongs to one of the most species-rich spider families, though specific ecological details for this species remain poorly documented.
Stenus latissimus
Stenus latissimus is a species of rove beetle in the subfamily Steninae, first described by Bernhauer in 1938. Members of the genus Stenus are known for their specialized hunting adaptations, including the ability to eject mouthparts using blood pressure to capture prey. The species has a transcontinental distribution spanning northern Asia and western North America. As with other Steninae, it is a specialist predator of small invertebrates.
Sthenopis pretiosus
Gold-spotted Ghost Moth
Sthenopis pretiosus is a ghost moth in the family Hepialidae with a transcontinental distribution spanning South and North America. The species was described multiple times under different names between 1856 and 1906 before taxonomic revision in 2015 consolidated these into a single species. It is characterized by a wingspan of 60–70 mm and distinctive gold-spotted patterning. The larval stage feeds on ferns in the genera Athyrium, Dryopteris, and Matteuccia.
Synageles
antlike jumping spiders
Synageles is a genus of ant-mimicking jumping spiders (family Salticidae) first described by Eugène Simon in 1876. The genus contains approximately 19–20 described species distributed across the Old World from Spain to China, with one species in northern Africa (S. repudiatus from Egypt), and in the New World from Mexico to Canada. These spiders exhibit striking morphological and behavioral mimicry of ants, including holding their second pair of legs aloft to simulate antennae and adopting characteristic ant-like locomotion.
Tetropium parvulum
Northern Spruce Borer
Tetropium parvulum, the northern spruce borer, is a small cerambycid beetle specialized on spruce hosts. It was elevated from synonymy with T. cinnamopterum based on distinct morphological differences in larvae and adults, and exhibits strict host specificity to Picea compared to the conifer generalist T. cinnamopterum. The species has a one-year life cycle and is an economically important borer of white and Engelmann spruce logs in western Canada.
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n-managementreform-managementreorganization-managementrestructuring-managementreengineering-managementredesign-managementreplanning-managementreinvestment-managementreallocation-managementredistribution-managementreconfiguration-managementrealignment-managementreorientation-managementrepositioning-managementrebranding-managementremarketing-managementrelaunch-managementreintroduction-managementreestablishment-managementreinstatement-managementreintegration-managementreconciliation-managementreunification-managementrebuilding-managementrebirth-managementresurrection-managementreincarnation-managementreemergence-managementreappearance-managementreturn-managementcomeback-managementrebound-managementresurgence-managementrevival-managementreawakening-managementrekindling-managementreignition-managementrelighting-managementreillumination-managementrebrightening-managementThanatus striatus
Striped Running Crab Spider
Thanatus striatus is a running crab spider in the family Philodromidae, characterized by its striped cephalothorax and ground-dwelling hunting behavior. The species has a broad distribution across the Northern Hemisphere, including North America, Europe, Turkey, Russia, and Central Asia. It is active primarily in spring and early summer, with adults capable of overwintering. The species is distinguished from similar slender crab spiders by its more robust body form and preference for ground-level habitats.
Xysticus emertoni
Emerton's Crab Spider
Xysticus emertoni, commonly known as Emerton's crab spider, is a species of ground crab spider in the family Thomisidae. It occurs across a broad transcontinental range spanning North America and Eurasia, including the United States, Canada, Russia, and Central Asia through China. As a member of the genus Xysticus, it exhibits the typical crab spider body plan with laterally extended legs adapted for ambush predation. The species has been documented as prey for spider wasps in the genus Dipogon.
Xysticus luctuosus
Xysticus luctuosus is a species of ground crab spider in the family Thomisidae, first described by Blackwall in 1836. It has a broad distribution spanning North America, Europe, Turkey, the Caucasus, Russia (from European to Far East regions), Kazakhstan, Iran, and Central Asia. As a member of the genus Xysticus, it exhibits the characteristic crab spider body plan with laterally extended legs adapted for ambush predation. The species has been documented in 45 iNaturalist observations, indicating moderate citizen science engagement.
Zelotes fratris
Zelotes fratris is a ground spider in the family Gnaphosidae, described by Chamberlin in 1920. It has a transcontinental distribution spanning Russia (Middle Siberia to Far East) and North America. The species belongs to a large genus of active hunting spiders that do not build webs to capture prey. Specific ecological details for this species remain limited in the literature.