Disjunct-distribution
Guides
Acmaeodera parkeri
Acmaeodera parkeri is a species of metallic wood-boring beetle in the family Buprestidae, described by Cazier in 1940. The species occurs in Central America and North America, with records from the southwestern United States and Mexico. Adults have been observed visiting flowers of several plant species, including Allionia incarnata (creeping four o'clock), Talinum whitei (White's flameflower), and Evolvulus arizonicus (Arizona blue-eyes).
Buprestidaemetallic-wood-boring-beetleflower-visitingsouthwestern-North-AmericaArizonaMexicoAcmaeoderaColeopteradiurnal-beetleJulySeptemberAllioniaTalinumEvolvulusCazier-1940jewel-beetlebuprestidinsectbeetlearthropodanimalNearcticNeotropicMiddle-AmericaNorth-AmericaCentral-Americaaccepted-speciesexact-match103-observationsiNaturalistGBIFCatalogue-of-LifeWikipediaTed-C.-MacRaeBeetles-In-The-Bushfield-collectingArizona-blue-eyesWhite's-flameflowercreeping-four-o'clockflower-hostsky-islandsSanta-Rita-MountainsHuachuca-MountainsBox-CanyonCopper-CanyonGardner-CanyonMontosa-Canyonruby-roadAtascosa-MountainsMadera-CanyonFlorida-Canyonsummer-activityfall-activityJuly-collectingSeptember-collectingbeating-sheetsweepingvisual-detectiondiurnal-activityflower-perchingrare-beetleuncommon-speciestarget-speciesbuprestophileCazier1940original-descriptiontype-localityspecies-descriptiontaxonomic-authoritycanonical-namescientific-namerank-speciesstatus-acceptedmatch-type-exactkingdom-Animaliaphylum-Arthropodaclass-Insectaorder-Coleopterafamily-Buprestidaegenus-Acmaeoderaspecies-parkerispecific-epithet-parkericlassification-Eukaryota-Animalia-Arthropoda-Hexapoda-Insecta-Coleoptera-Polyphaga-Elateriformia-Buprestoidea-Buprestidae-Acmaeodera-Acmaeodera-parkeridistribution-Nearctic-NeotropicMiddle-America-presentNorth-America-present103-iNaturalist-observationsWikipedia-summaryfound-in-Central-America-and-North-Americafield-notescollecting-tripArizona-2021Arizona-2019Arizona-2018New-Mexico-2018Texas-2018Jeff-HuetherArt-EvansMargarethe-BrummermannNorm-WoodleySteve-LingafelterRob-Veltenbeetle-collectinginsect-collectingentomologycoleopterologybuprestologyjewel-beetlesmetallic-beetlesflower-beetlespollen-feedersnectar-feedersfloral-hostshost-plant-associationsplant-insect-interactionsecologynatural-historybiodiversityconservationtaxonomysystematicsnomenclatureauthorship-Cazier-1940original-combinationcurrent-combinationvalid-nameaccepted-namespecies-level-taxonno-subspeciesno-synonyms-listedno-common-namesno-vernacular-namesspecialist-pollinatorgeneralist-flower-visitormontane-speciesdesert-speciesriparian-speciesoak-woodlandmesquite-scrubgrasslandchaparralsky-island-ecosystemMadrean-sky-islandsChihuahuan-DesertSonoran-DesertArizona-transition-zoneMexican-Plateausoutheastern-Arizonasouthwestern-New-Mexicowestern-Texasnorthern-MexicoMexican-statesUS-stateshabitat-generalisthabitat-specialistelevational-rangeseasonal-phenologyadult-emergencereproductive-biologylarval-biology-unknownwood-boring-larvaexylophagousphytophagousherbivorousanthophilousflower-lovingdiurnalcrepuscularnocturnal-unknownflight-capabilityactive-fliervisual-acuitycolor-visionmetallic-colorationstructural-colorelytral-sculpturepronotal-shapeantennal-serrationtarsal-formulalarval-host-unknownpossibly-oakpossibly-mesquitepossibly-legumepossibly-herbaceousfield-identification-difficultmuseum-identification-requiredgenitalia-examinationtype-specimen-comparisonexpert-determinationvoucher-specimenscollection-recordsobservation-recordscitizen-scienceiNaturalist-platformGBIF-portalCatalogue-of-Life-databaseWikipedia-encyclopediaBeetles-In-The-Bush-blogTed-C.-MacRae-personal-communicationprimary-literatureCazier-1940-original-descriptionsubsequent-redescriptionstaxonomic-revisionsphylogenetic-placementAcmaeodera-genus-groupAcmaeoderini-tribeBuprestinae-subfamilyBuprestidae-familyElateriformia-infraorderPolyphaga-suborderColeoptera-orderInsecta-classHexapoda-superclassArthropoda-phylumAnimalia-kingdomEukaryota-domainbiogeographydispersalrange-extensionrange-contractionpopulation-statusabundancerarityconservation-statusdata-deficientIUCN-not-evaluatedendemismregional-endemicwidespreaddisjunct-distributioncontinuous-distributionhabitat-fragmentationclimate-change-vulnerabilitycollection-biassampling-effortdetection-probabilityspecies-distribution-modelingecological-nichefundamental-nicherealized-nichebiotic-interactionscompetitionpredationparasitismmutualismpollinationfood-webtrophic-levelprimary-consumerherbivoredetritivore-unknowncarnivore-unknownomnivore-unknownbehavioral-ecologyforagingmate-locationovipositionlarval-developmentpupal-developmentadult-longevitygeneration-timevoltinismunivoltinebivoltine-unknownmultivoltine-unknownoverwinteringdiapausecold-hardinessheat-tolerancedesiccation-resistancewater-balancemetabolic-rateactivity-temperaturethermal-biologybiochemical-adaptationmorphological-adaptationevolutionary-historyphylogenydiversificationspeciationadaptive-radiationconvergent-evolutionmimicryaposematismcrypsiscamouflagesexual-dimorphismsexual-selectionmating-systemreproductive-strategyfecundityegg-productionlarval-survivalpopulation-dynamicsmetapopulationsource-sinkhabitat-patchinesslandscape-ecologyecosystem-servicespollination-servicenutrient-cyclingdecompositionwood-decompositionforest-healthindicator-speciesbioindicatorenvironmental-monitoringecosystem-healthbiodiversity-assessmentconservation-planningprotected-areaswildlife-managementhabitat-restorationinvasi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ycommon-but-differentiated-responsibilitiespolluter-pays-principleuser-pays-principlebeneficiary-pays-principleprecautionpreventionintergenerational-responsibilityintragenerational-responsibilitystewardshipcustodianshipguardianshiptrusteeshipcommon-heritage-of-humankindcommon-concern-of-humankindglobal-public-goodglobal-commonstragedy-of-the-commonscollective-action-problemfree-riderprisoner's-dilemmagame-theoryinstitutional-economicspolitical-economypolitical-ecologyenvironmental-historyhistorical-ecologydeep-historyanthropocenegreat-accelerationplanetary-boundariessafe-operating-spacedoughnut-economicsdegrowthsteady-state-economycircular-economyblue-economygreen-economybioeconomysharing-economycollaborative-consumptionprosumermaker-movementopen-sourcecreative-commonscopyleftpeer-productioncommons-based-peer-productiondigital-commonsknowledge-commonsdata-commonsgenetic-resourcesaccess-and-benefit-sharingNagoya-protocolCartagena-protocolAarhus-conventionRio-declarationStockholm-declarationEarth-charterfuture-generationslong-term-thinkingfutures-studiesscenario-analysisbackcastinganticipatory-governancetransformative-changesystemic-changeparadigm-shiftsocial-ecological-transformationjust-transitiongreen-new-dealecological-civilizationharmony-with-natureliving-in-harmony-with-natureintrinsic-valueinstrumental-valuerelational-valuenature's-rightsrights-of-naturelegal-personhoodstandingrepresentationprocedural-rightssubstantive-rightsenvironmental-rule-of-lawenvironmental-democracyenvironmental-constitutionalismenvironmental-rightsright-to-environmentright-to-healthright-to-foodright-to-waterright-to-developmentsustainable-developmentcommon-heritagecommon-concernglobal-governancemultilateralismplurilateralismminilateralismbilateralismunilateralismhegemonymultipolaritypolycentricitynetworked-governancefragmented-governancewicked-problemssuper-wicked-problemstame-problemsproblem-framingproblem-definitionsolution-spaceoption-spacedecision-spacepolicy-spaceinstitutional-spacepolitical-spacediscursive-spacenarrativestorytellingframingsense-makingmeaning-makingidentityvaluesbeliefsattitudesnormscultureworldviewparadigmepistemediscourseresistancecounter-hegemonysocial-movementenvironmental-movementconservation-movementclimate-movementindigenous-movementyouth-movementfeminist-movementenvironmental-justice-movementfood-sovereignty-movementland-rights-movementwater-rights-movementanimal-rights-movementnature-rights-movementecocentrismanthropocentrismbiocentrismzoocentrismsentientismecofeminismdeep-ecologysocial-ecologyecological-modernizationecological-economicsenvironmental-economicsnatural-resource-economicsecological-anthropologyenvironmental-sociologyenvironmental-psychologyenvironmental-educationenvironmental-communicationrisk-communicationcrisis-communicationstrategic-communicationpublic-relationsmarketingbehavior-changesocial-marketingcommunity-based-social-marketingnudgingchoice-architecturedefault-optionsimplificationfeedbacksocial-normscommitmentdisincentivesregulationstandardtaxsubsidycap-and-tradeoffsetcreditpaymentrewardpunishmentvoluntary-actionmandatory-actionhybrid-governancemeta-governancesteeringrowingrowing-backrowing-forwardrowing-togetherrowing-apartrowing-in-circlesrowing-against-the-currentrowing-with-the-currentrowing-upstreamrowing-downstreamrowing-acrossrowing-throughrowing-beyondrowing-withinrowing-withoutrowing-aboverowing-belowrowing-besiderowing-betweenrowing-amongrowing-amidstrowing-throughoutrowing-everywhererowing-nowhererowing-somewhererowing-anywhereAenigmatias
Aenigmatias is a genus of wingless (apterous) scuttle flies in the family Phoridae, characterized by a distinctive cockroach-like morphology. The genus was originally described from Denmark and long known from only a single specimen found beneath a stone. Subsequent records have documented species across North America (Arizona), Europe, and Asia, with a recent first record in Egypt extending the range to North Africa. The genus belongs to the subfamily Aenigmatiinae and tribe Aenigmatiini, representing an anomalous lineage within Phoridae due to its flightless condition and cryptic habits.
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.
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.
Attenella margarita
spiny crawler mayfly
Attenella margarita is a species of spiny crawler mayfly in the family Ephemerellidae. It exhibits a disjunct east-west distribution pattern across North America, which is rare among mayflies. The species has been documented from the southern half of Canada and the continental United States, with a southeastern range extension to North Carolina representing approximately 1,300 km beyond previously known western localities.
Baeoalitriozus
Baeoalitriozus is a genus of psyllids (true bugs in the family Triozidae) comprising at least 16 described species. The genus was established by Li in 2011 and has a notably broad geographic distribution spanning three continents: North America, Africa, and Southeastern Asia. Species in this genus are associated with diverse host plants, including Diospyros (persimmon) and Sersalisia. The genus demonstrates considerable taxonomic diversity with species described across multiple decades by various psyllid specialists including Crawford, Tuthill, Hollis, and Buckton.
Brephidium
pygmy blues
Brephidium is a genus of butterflies in the family Lycaenidae, commonly known as pygmy blues. The genus contains three species with a striking disjunct distribution: two species occur in the Americas (Brephidium exilis and Brephidium pseudofea), while the third (Brephidium metophis) is found in southern Africa. These are among the smallest butterflies in the world, with Brephidium exilis being the smallest butterfly in North America.
Broscodera
Broscodera is a genus of ground beetles in the family Carabidae, established by Lindroth in 1961. The genus comprises at least four described species distributed across East Asia and western North America. Members of this genus belong to the subfamily Broscinae, a group of predominantly nocturnal beetles often associated with moist habitats. The genus shows a disjunct distribution pattern, with species occurring in China, Nepal, and the Pacific Northwest of North America.
Buemarinoidae
Buemarinoid Harvestmen
Buemarinoidae is a small family of harvestmen (Opiliones: Laniatores) comprising approximately six genera and six described species. The family belongs to the superfamily Triaenonychoidea, which contains over 440 species across four families. Buemarinoidae is considered an ancient, relictual lineage with a disjunct global distribution and a high prevalence of monotypic genera, suggesting significant historical extinction events.
Caddo agilis
Caddo agilis is a species of harvestman (Opiliones) in the family Caddidae, first described by Nathan Banks in 1892. It exhibits a disjunct distribution spanning North America and Japan, a pattern shared with its congener Caddo pepperella. Phylogenetic evidence indicates these two species diverged before acquiring their current geographic ranges, suggesting the disjunction resulted from vicariance rather than recent dispersal. The species belongs to a small family of harvestmen characterized by distinctive morphological features.
Caddo pepperella
Caddo pepperella is a species of harvestman (Opiliones: Caddidae) described by Shear in 1975. It occurs in North America and is sympatric with the closely related Caddo agilis. Phylogenetic studies indicate that C. pepperella and C. agilis diverged before acquiring their current disjunct distributions in North America and Japan. Like other members of the family Caddidae, it belongs to the suborder Eupnoi and possesses the characteristic elongated body form and reduced eyes typical of this harvestman family.
Carabus chamissonis
Fisher's worm and slug hunter
Carabus chamissonis is a ground beetle species restricted to tundra environments across northern North America. It occupies open, dry tundra habitats with better drainage than those used by the related Carabus truncaticollis. The species exhibits brachyptery (reduced wings) and nocturnal activity patterns. Adults overwinter within their own pupal cavities, an unusual behavior among ground beetles. Disjunct populations occur on isolated mountaintops in New England, far south of the main Arctic range.
Centris lanosa
Wooly Oil-Digger
Centris lanosa is a specialized oil-collecting bee in the family Apidae, commonly known as the wooly oil-digger. It is one of the few bee species that has evolved to collect fatty oils rather than nectar from flowers, specifically from Krameria species. The bee mixes these oils with pollen to provision its larvae. It has a disjunct distribution across the southeastern and southwestern United States, with populations separated by more than 250 km.
Centrodera spurca
yellow Douglas-fir borer
Centrodera spurca, commonly known as the yellow Douglas-fir borer, is a species of flower longhorn beetle in the family Cerambycidae. It is native to North America, with records from western Canada (British Columbia, Alberta) and the western United States. The species has been documented in coniferous forest habitats, particularly in association with Douglas-fir (Pseudotsuga menziesii). A notable disjunct population occurs in the Sacramento Mountains of New Mexico, separated from the main Pacific Coast distribution.
Chasmatonotus
Chasmatonotus is a genus of non-biting midges in the family Chironomidae, subfamily Orthocladiinae. The genus contains approximately 14 described species and exhibits a disjunct distribution spanning Japan, the Nearctic region, and Continental Asia. Adults are fully winged but non-flying, a distinctive trait among chironomids. The genus was historically considered restricted to Japan and North America until the 2023 discovery of a species in Korea.
Cicindela limbata nogahabarensis
Nogahabara Tiger Beetle
Cicindela limbata nogahabarensis is a subspecies of sandy tiger beetle endemic to the Nogahabara Dunes in northwestern Alaska. Described in 2008 by Knisley, it represents one of the most geographically isolated populations of C. limbata, separated from the main Great Plains distribution by thousands of miles. Morphological and mitochondrial DNA analyses support its distinct subspecific status despite superficial resemblance to subspecies nympha. Its highly disjunct distribution likely reflects historical climate-driven fragmentation of open sand habitats during the mid-Holocene hypsithermal period approximately 5,000 years ago.
Cicindela limbata nympha
Nymphal Tiger Beetle
Cicindela limbata nympha is a subspecies of sandy tiger beetle restricted to open sand habitats of northern Montana, North Dakota, and the Canadian Prairie Provinces. It is separated from the nominate subspecies by a distributional gap to the south. Individuals exhibit more extensively developed white maculations on the elytra than the nominate form, with darker intervening areas. This subspecies is part of a fragmented distribution pattern across North America that likely resulted from historical climate-driven contractions of sand dune habitats.
Colaspidea
Colaspidea is a genus of leaf beetles in the subfamily Eumolpinae. The genus exhibits a disjunct distribution, occurring in the Mediterranean region and in western North America (California and the southwestern United States). A notable morphological distinction exists between regional species: North American species possess fully developed wings, while Mediterranean species are wingless. Recent phylogenetic hypotheses suggest that Mediterranean Colaspidea may be sister to Chalcosicya, with Colaspina sister to both combined; North American species may represent a separate genus. The genus currently contains 19 described species.
Cymbiodyta
Cymbiodyta is a genus of water scavenger beetles (Hydrophilidae: Enochrinae) comprising 31 described species. The genus exhibits a strikingly disjunct distribution: 28 species occur in the Americas, while only three species inhabit the Palearctic region. A fossil species from Eocene Baltic amber (C. samueli) confirms the genus has persisted in Europe since at least the Eocene, supporting biogeographic reconstructions indicating an ancient Euro-American distribution dating to the Late Cretaceous when land connections existed between North America and Europe.
Dasypodainae
Dasypodainae is a subfamily of melittid bees comprising more than 100 species across eight genera. These bees are found in Africa and the northern temperate zone, with a notable disjunct distribution in the genus Hesperapis, which occurs in both North America and southern Africa. They are primarily associated with xeric habitats and exhibit specialized pollen-foraging behaviors.
Deretaphrus
Deretaphrus is a genus of dry bark beetles (family Bothrideridae) comprising 25 species with a highly disjunct distribution centered on Australia. The genus was established in 1842 by Edward Newman based on specimens from Port Phillip, Australia. Most species (22) occur in Australia, with single species in New Caledonia, Bolivia, and western North America. The larvae are ectoparasites of woodboring beetle grubs, while adults appear to consume plant material.
Dicellophilus
Dicellophilus is a genus of soil centipedes in the family Mecistocephalidae, established by O.F. Cook in 1896 with D. limatus as the type species. The genus comprises five species distributed across three highly disjunct regions: central Europe, Japan (Honshu), and the western United States. No other group of centipedes or Northern Hemisphere terrestrial animals exhibits such a peculiar geographic pattern. Species range from 5–7 cm in length with 41–45 pairs of legs, the number being invariant within each species.
Dicranoclista
Dicranoclista is a genus of bee flies (family Bombyliidae) comprising four described species distributed disjunctly across North America and Africa. The genus was established by Bezzi in 1924 and belongs to the subfamily Anthracinae. Species occur in diverse habitats from the western United States and Canada to West Africa and Sudan.
Enoplognatha intrepida
Enoplognatha intrepida is a cobweb spider in the family Theridiidae, characterized by its membership in the infraorder Araneomorphae. The species has a notably disjunct distribution spanning North America (USA, Canada, Greenland) and East Asia (Korea). It is one of several species in the genus Enoplognatha, which includes the well-studied and polymorphic E. ovata.
Epimetopidae
Hooded Shore Beetles
Epimetopidae is a small family of semi-aquatic beetles in the superfamily Hydrophiloidea, comprising approximately 72 described species across three genera. The family exhibits a disjunct distribution: Epimetopus is restricted to the New World (Neotropical and Nearctic regions), Eumetopus occurs in Asia, and Eupotemus is found in Africa. A distinctive feature of the family is the pronotal hood—a central projection of the pronotum that forms a shelf above the head. Females of all three genera carry egg cases on the underside of the abdomen, representing one of three independent origins of maternal care in Hydrophiloidea.
Euacidalia brownsvillea
Euacidalia brownsvillea is a geometrid moth described by Cassino in 1931. The species exhibits an unusual disjunct distribution, occurring in both Texas and Hawaii. It belongs to the subfamily Sterrhinae, a group commonly known as wavy-line or carpet moths.
Eulichadidae
Forest Stream Beetles
Eulichadidae is a small family of beetles within Elateriformia, comprising two extant genera with contrasting distributions: Eulichas (Indomalayan realm, Asia) and Stenocolus (Western North America). Adults are terrestrial, while larvae are obligately aquatic in forest streams. The family exhibits notable ecological divergence between genera in habitat use and adult behavior.
Euphyes dukesi
Dukes' skipper
Euphyes dukesi, known as Dukes' skipper, is a small wetland-associated skipper butterfly endemic to eastern North America. The species exhibits a fragmented distribution across three geographically isolated populations: the Atlantic coastal plain, the lower Mississippi Valley, and the Great Lakes region. It is strictly associated with shaded wetland habitats where sedges serve as larval host plants. The species was first described in 1923 from Alabama and named for collector W. C. Dukes. Two subspecies are recognized: the nominate form and the Florida-endemic E. d. calhouni, which occupies swamp habitats with distinct morphological differences.
Euproserpinus euterpe
Kern primrose sphinx moth, euterpe sphinx moth
Euproserpinus euterpe is a small, day-flying sphinx moth endemic to California and federally listed as threatened. Adults are active from mid-January to early April, with peak activity in February and March. The species has a highly restricted, disjunct distribution limited to two known locations in Kern and San Luis Obispo counties. Larvae are specialized feeders on evening primrose (Camissonia species), while adults nectar on diverse regional wildflowers. Population abundance fluctuates dramatically with climatic conditions, particularly rainfall.
federally-threatenedendemicdiurnalspecialist-herbivoreglacial-relictCalifornia-endemicevening-primrose-feedersandy-soil-pupationpopulation-fluctuationconservation-concerninsect-collecting-threathabitat-specialistdisjunct-distributionlate-winter-emergencemorning-eclosionagricultural-disturbance-toleranceBureau-of-Land-Managementrecovery-plan-speciespresumed-extinct-rediscoveryclimate-sensitive-population-dynamicsEuxoa nomas
Euxoa nomas is a noctuid moth species described by Nikolay Grigoryevich Erschoff in 1874. The species has a disjunct distribution spanning western Asia (Iran and Turkestan) and northwestern North America (Alaska and Canada). Between 1987 and 2010, populations were treated as two separate subspecies—E. n. nomas in Asia and E. n. incognita in North America—though these subspecific designations have since been revised. The species belongs to the large and diverse genus Euxoa, commonly known as darts, which includes numerous agricultural pest species.
Hesperapini
Hesperapini is a small tribe of bees within the family Melittidae, subfamily Dasypodainae. The tribe contains a limited number of genera and species, primarily distributed in arid regions. These bees are ground-nesting and exhibit specialized pollen-collecting structures. They represent an early-diverging lineage among bees, contributing to understanding of bee evolution.
Hesperoconopa
Hesperoconopa is a genus of crane flies in the family Limoniidae, first described by Charles Paul Alexander in 1948. The genus contains eight recognized species distributed across three disjunct regions: North America, India, and the Russian Far East. Members belong to the subfamily Chioneinae, a diverse group of small to medium-sized crane flies. The genus name derives from Greek roots, with 'hespero-' referring to the west and 'conopa' relating to crane flies.
Hesperotettix speciosus
Showy Grasshopper, Handsome Purple-striped Grasshopper, Western Green Grasshopper
Hesperotettix speciosus is a spur-throated grasshopper in the family Acrididae. The species is broadly distributed across the Great Plains of North America, with a notable disjunct population discovered in the Black Belt Prairie of Alabama representing a significant eastward range extension. It is characterized by bright purplish-red striping and relatively short wings that limit dispersal capability.
Hirudisomatidae
Hirudisomatidae is a family of colobognathan millipedes in the order Polyzoniida, comprising approximately 20 species across seven genera. The family exhibits a disjunct distribution spanning Eurasia from Spain to the Himalayas, Japan, and western North America from southwest Canada to central Mexico. Members of this family possess characteristic colobognathan features including reduced mouthparts and a simplified head structure. The family contains two genera in the Western Hemisphere (Octoglena and Mexiconium) with seven species, while the remaining five genera occur in the Eastern Hemisphere.
Hydrotrupes
Hydrotrupes is a genus of diving beetles (Dytiscidae: Agabinae) established by Sharp in 1882. The genus contains three species: two extant (H. chinensis in eastern China and H. palpalis in western North America) and one fossil (H. prometheus from Eocene Baltic amber). The fossil record establishes Hydrotrupes as at least 40 million years old and demonstrates remarkable morphological conservation over this timespan. The current disjunct distribution of living species is interpreted as a relict of a formerly widespread distribution across northern continents during the Eocene.
Ithonidae
moth lacewings, giant lacewings
Ithonidae is a small family of neuropteran insects comprising ten living genera and over a dozen extinct genera known from fossils. The family represents one of the most primitive lineages within Neuroptera. Adults are medium to large-sized with distinctive wing venation. Larvae exhibit a highly unusual grub-like (scarabaeiform) body form with stout mandibles, unique among lacewings, and lead a subterranean lifestyle. The modern distribution is notably disjunct, with genera occurring in Australia, the Americas, and Asia, while fossil evidence indicates a formerly broader global range from the Early Jurassic to Late Eocene.
Janseodes melanospila
Janseodes melanospila is the sole species in the monotypic genus Janseodes. It is a moth with a notably wide geographic range spanning three continents: Asia, Africa, and North America. The species was first described from India in 1852 and has since been recorded in South Africa and Florida, USA. Its disjunct distribution pattern suggests possible human-mediated introduction to some regions, though natural dispersal mechanisms remain unclear.
Lacinipolia buscki
cutworm moth, dart moth
Lacinipolia buscki is a noctuid moth species described by Barnes and Benjamin in 1927. It belongs to the genus Lacinipolia, a group of owlet moths commonly known as cutworms or dart moths. The species has a disjunct distribution spanning Australia and North America, an unusual biogeographic pattern for a noctuid. Adults are attracted to light and are active during summer months. The MONA (Moth Photographers Group) or Hodges number for this species is 10421.
Lasionycta uniformis
Lasionycta uniformis is a moth species in the family Noctuidae, first described by Smith in 1893. The species exhibits a disjunct distribution across montane regions of western North America, ranging from southern Yukon to northern California and Colorado, with an isolated eastern population in the Gaspé Peninsula of Quebec. Five subspecies have been recognized, differentiated primarily by geographic range and subtle morphological variation. Adults are active during mid-summer.
Leschius
Leschius is a genus of millipedes in the family Anthroleucosomatidae, established in 2004 to accommodate Leschius mcallisteri from Washington State, USA. This genus represents the first and only North American representative of a family otherwise restricted to the Palearctic region. The genus is distinguished by morphological features including small body size, reduced segment number, and highly modified male ninth legs.
Liancalus genualis
Liancalus genualis is a species of long-legged fly in the family Dolichopodidae, notable as the only member of its genus known from eastern North America. Like other dolichopodids, it is a predatory fly. The species was described by Loew in 1861.
Melanapamea
coastal plain apamea moth
Melanapamea is a monotypic genus of noctuid moths established by Lafontaine in 2009. The sole species, Melanapamea mixta, is a rarely collected moth with scattered populations across eastern North America. It is primarily associated with bog habitats and shows a disjunct distribution pattern with core populations in the Northeast and scattered records in the western United States.
Metaclisa
Metaclisa is a genus of darkling beetles (Tenebrionidae) and the sole genus of the tribe Metaclisini. It contains at least four described species. The genus has a notably broad geographic distribution spanning multiple biogeographic realms.
Miscodera
A monotypic genus of ground beetles (Carabidae) containing only Miscodera arctica. The genus has a circumpolar Arctic distribution with disjunct populations in northern New England. Its taxonomic placement has been historically disputed, currently assigned to subfamily Broscinae though formerly placed in Trechinae.
Mythenteles
Mythenteles is a genus of minute bee flies in the family Mythicomyiidae. The genus was established by Hall & Evenhuis in 1986 and contains species of very small size, consistent with the 'microbombyliid' designation. A 2011 world revision recognized eight new species and confirmed a disjunct Northern Hemisphere distribution pattern. The genus is taxonomically well-defined but biologically poorly known.
Nalassus
A genus of darkling beetles (Tenebrionidae) comprising more than 70 species distributed across the Palearctic and North America. Species occupy diverse habitats from coniferous forests to alpine zones and steppe landscapes. The genus exhibits pronounced ecological specialization, with distinct species groups adapted to forest, alpine, or steppe environments and corresponding trophic niches.
Nipponoserica peregrina
Nipponoserica peregrina is a scarab beetle in the family Scarabaeidae. The species exhibits a disjunct distribution, occurring in Japan and in the eastern United States (Maryland, Massachusetts, New York, Virginia, West Virginia, and Vermont). The North American population is considered introduced. The specific epithet 'peregrina' refers to its wandering or foreign nature, reflecting its transoceanic range.
Nomius
Nomius is a genus of ground beetles (Carabidae) in the tribe Psydrini, subfamily Psydrinae. The genus contains at least one well-documented species, Nomius pygmaeus, which exhibits a remarkable disjunct distribution across North America, Europe, and Asia. Members are characterized by their isolated phylogenetic position within the Harpalinae subfamily.
Nomius pygmaeus
stink beetle, stinking beetle
Nomius pygmaeus is a small ground beetle in family Carabidae, the sole representative of tribe Psydrini. Adults emit a distinctive repugnant odor when captured or disturbed, earning the common name "stink beetle." The species exhibits a remarkably disjunct global distribution, occurring in North America from Canada to California and sporadically across parts of Europe and southwestern Asia.
Omethinae
Omethinae is a small subfamily of click beetles within the family Omethidae, containing only the genus Omethus. These beetles are among the most obscure members of Elateroidea, with very few specimens known and limited biological data available. The group has been historically overlooked due to its rarity and the remote habitats of its constituent species. Current knowledge is based primarily on scattered museum collections rather than field studies.