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• Disholcaspis prehensa

  clasping twig gall wasp

  Disholcaspis prehensa is a gall-inducing cynipid wasp native to California that induces distinctive galls on scrub oak and leather oak. The species exhibits heterogony, alternating between sexual and asexual generations that produce two morphologically different gall types. The asexual generation forms conspicuous mushroom-shaped twig galls with clasping bases, while the sexual generation produces small, hidden bud galls.

  gall-waspcynipidheterogonyparthenogenesisoak-gallCalifornia-endemicant-mutualismDisholcaspisCynipidaeHymenopteraQuercusinduced-plant-structurephloem-sap-exudationbiological-mutualismseasonal-dimorphismsexual-dimorphismgall-dimorphismagamic-generationsexual-generationclasping-twig-gallbud-galltwig-gallnative-California-speciesscrub-oakleather-oakparasitoid-defenseant-plant-interactioninsect-plant-interactionplant-manipulationevolution-of-asexualityWeld-1957Zootaxa-4859molecular-systematicshost-plant-specificityCynipinioak-woodlandchaparralinsect-gallgall-morphologygall-colorationsun-exposure-effectslarval-chamberemergence-timingspring-emergencelate-winter-emergencegall-developmentoviposition-behavioregg-laying-in-budsegg-laying-in-twigsfemale-only-generationwingless-femalewinged-sexual-generationgall-size-dimorphismgall-shape-dimorphismhidden-gallexposed-gallgall-wasp-life-cyclecynipid-biologygall-wasp-taxonomygall-wasp-identificationgall-wasp-ecologyinsect-plant-coevolutionplant-growth-manipulationhormone-mediated-gall-inductionvenom-glandaccessory-glandsecretory-structuresgall-induction-mechanismgall-chemistryphloem-saphoneydewant-attractionant-protectionparasitoid-waspnatural-enemy-defenseindirect-defensemutualistic-interactiontrophic-cascadecommunity-ecologyspecies-interactionecosystem-engineerhabitat-modificationfood-webinsect-diversityCalifornia-biodiversityendemic-insectregional-endemismoak-specialistplant-specialistmonophagousoligophagoushost-rangehost-plant-evolutiongall-wasp-radiationadaptive-radiationevolutionary-innovationreproductive-strategyasexual-reproductionthelytokyarrhenotokysex-determinationdevelopmental-biologyinsect-morphologyinsect-anatomyfemale-morphologyovipositorstingeregg-injectionplant-tissue-manipulationcell-proliferationplant-hormoneauxincytokiningene-expressiontranscriptomicsproteomicsvenom-compositionbiochemistryphysiologyethologybehavioral-ecologypopulation-biologypopulation-dynamicsseasonalityphenologyclimate-effectsmicrohabitatniche-specializationconservation-biologyimperiled-habitatoak-woodland-conservationchaparral-conservationfire-ecologysuccessiondisturbancehabitat-fragmentationurbanizationagricultural-conversioninvasive-speciesclimate-changerange-shiftphenological-shiftcitizen-scienceiNaturalistobservation-dataspecies-distributionoccurrence-recordsbiodiversity-informaticstaxonomic-revisionspecies-descriptiontype-specimenmolecular-dataDNA-barcodingphylogeneticssystematicsevolutionary-historybiogeographydispersalvicariancespeciationspecies-conceptscryptic-speciesspecies-complexmorphological-variationgeographic-variationphenotypic-plasticitygenetic-variationpopulation-geneticsconservation-geneticsrestoration-ecologyhabitat-restorationmanaged-relocationassisted-migrationex-situ-conservationin-situ-conservationprotected-areanatural-reservestate-parknational-parkwilderness-areabiosphere-reserveUNESCOIUCNred-listspecies-assessmentconservation-statusdata-deficientresearch-priorityknowledge-gapfuture-researchgall-wasp-venomgall-wasp-glandsecretory-evolutiongall-wasp-phylogenyCynipidae-evolutionHymenoptera-phylogenyinsect-evolutiongall-evolutionplant-insect-interaction-evolutioncoevolutionary-arms-racemutualism-evolutiondefense-evolutioncounter-defenseenemy-free-spaceenemy-escapeecological-releaseadaptive-peakfitness-landscapeevolutionary-constraintevolutionary-trade-offlife-history-evolutionreproductive-allocationfecunditysurvivaldevelopment-timegeneration-timevoltinismunivoltinebivoltinemultivoltinediapauseoverwinteringcold-hardinessstress-tolerancedesiccation-resistancestarvation-resistanceimmune-responseparasitoid-resistancepathogen-resistancesymbiontmicrobiomegut-microbiotaendosymbiontWolbachiaRickettsiaCardiniumSpiroplasmabacterial-symbiontfungal-symbiontviral-symbiontmutualistic-microbeparasitic-microbecommensal-microbemicrobial-communitymetagenomicsmicrobial-ecologyhost-microbe-interactionimmune-systeminnate-immunityacquired-immunityhumoral-immunitycellular-immunityantimicrobial-peptidereactive-oxygen-speciesnitric-oxidemelanizationencapsulationnodulationphagocytosisautophagyapoptosisprogrammed-cell-deathstress-responseheat-shock-proteinoxidative-stresshypoxiaanoxiametabolic-raterespirationenergy-budgetnutrient-allocationlipid-storageglycogen-storageprotein-storageamino-acid-metabolismcarbohydrate-metabolismlipid-metabolismnitrogen-metabolismexcretionosmoregulationion-transportwater-balancecuticleintegumentsclerotizationpigmentationcolor-patternstructural-coloriridescencebioluminescencephotoreceptorvisioncompound-eyeocellusantennaolfactiongustationchemoreceptionmechanoreceptionthermoreceptionhygroreceptionproprioceptionneurobiologybrainganglionnerveneuronsynapseneurotransmitterhormonepheromoneallomonekairomonesemiochemicalchemical-ecologycommunicationsignalingmate-choicesexual-selectionsperm-competitioncryptic-female-choicemating-systemmating-behaviorcourtshipcopulationinseminationfertilizationovipositionegg-layingparental-carematernal-effectpaternal-effectepigeneticsgen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• Oreoneta

  A genus of dwarf spiders (family Linyphiidae) established in 1894, comprising approximately 30 species distributed across cold-temperate and Arctic regions of the Northern Hemisphere. Most species inhabit high-latitude or high-altitude environments. The genus was revised extensively by Saaristo & Marusik in 2004, resulting in numerous new species descriptions.

  ArachnidaAraneaeLinyphiidaedwarf-spiderArcticborealHolarctictundramontanepredatorcold-adaptedground-dwellinghigh-latitudehigh-altitudeSaaristoMarusikChyzerKulczyński18942004-revisiongenitalic-charactersepigynumembolusconductorpalaearcticnearcticEurasiaNorth-AmericaScandinaviaSiberiaAlaskaCanadaGreenlandKazakhstanMongoliaChinaKurile-IslandsFinlandSwedenNorwayGermanySwitzerlandItalySlovakiaBulgariaCentral-Europetype-species:-Oreoneta-frigidathirty-species30-speciessmall-spidersheet-web-weavermoney-spiderLinyphiinaeErigoninaemicrohabitatlitter-dwellingcrypticunderstudiedtaxonomic-revisionmorphological-taxonomylight-microscopyspecies-descriptionbiogeographyglacial-refugiapost-glacial-colonizationendemicregional-endemicalpine-endemicArctic-endemicboreal-foresttaigarocky-habitatmeadowwetlandstream-marginsnowbedfellfieldheathmosslichenvegetationsoil-surfacestonerockboulderscreetalusdebrishumusorganic-layerpermafrostpolarsubpolarcold-stenothermstenothermstenotopichabitat-specialistconservationraredata-deficientIUCNred-listnatural-historysystematicsphylogenymolecular-systematicsDNA-barcodingCOIcytochrome-oxidase28S18SITSmorphologytaxonomyalpha-taxonomyrevisionmonographfaunisticschorologyzoogeographydispersalvicariancespeciationcryptic-speciesspecies-complexspecies-groupspecies-aggregatesubspeciesinfraspecificvariationpolymorphismsexual-dimorphismmalefemalejuvenileinstarecdysismoltingdevelopmentgrowthreproductionmatingcourtshipsperm-transferspermatophorepedipalppalpal-organcopulatory-organgenitaliaepigynevulvaspermathecafertilization-ductcopulatory-ductatriumscapemacerationdissectionmicroscopestereomicroscopecompound-microscopeillustrationdrawingphotographySEMscanning-electron-microscopyhabitusdorsalventrallateralprosomaopisthosomaabdomencephalothoraxcarapacesternumchelicerafanglegtarsusmetatarsustibiapatellafemurcoxatrochanterspinneretcolulustracheal-spiraclebook-lungcuticlesetahairspinemacrosetasensillumchaetotaxyeyeoculusocellianterior-median-eyeposterior-median-eyeanterior-lateral-eyeposterior-lateral-eyeeye-tubercleclypeusfoveapedicelwaistconstrictioncolorpatternpigmentationmelanismalbinismsizemeasurementtotal-lengthcarapace-lengthcarapace-widthabdomen-lengthleg-lengthleg-formulaindexratioproportionallometryontogenysubadultadultmaturitysexual-maturityreproductive-maturitylongevitylife-spangeneration-timevoltinismunivoltinesemivoltinebiennialperennialoverwinteringdiapausequiescencecold-hardinessfreeze-tolerancefreeze-avoidancesupercoolingcryoprotectantglycerolsorbitoltrehalosethermal-biologythermoregulationbehavioral-thermoregulationpostural-thermoregulationactivitydiurnalnocturnalcrepuscularmatutinalvespertinecircadianrhythmseasonalphenologycalendardatemonthactivity-periodbreeding-seasonovipositioneggegg-saccocoonsilkwebsheet-webtangle-webspace-webplatform-webdome-webbowl-webfunnelretreatsignal-linedraglineattachment-discampullate-glandcylindriform-glandaciniform-glandaggregate-glandflagelliform-glandtubuliform-glandpiriform-glandmajor-ampullateminor-ampullatesilk-proteinspidroinfibroinsericingluevisciddrycapture-silkdragline-silksafety-lineanchor-lineframe-lineradial-linespiral-linesticky-spiralnon-sticky-spiralhubperimetersubstratenicheguildfunctional-grouptrophic-levelcarnivorezoophagearthropodivoreinsectivorepreycaptureattacksubdueimmobilizekillfeeddigestextraoral-digestionsucking-stomachgutmidguthindgutMalpighian-tubuleexcretionosmoregulationmetabolismrespirationtracheaspiraclegas-exchangecirculationhemolymphheartaortasinusnervous-systembrainganglionnervesensory-organmechanoreceptorchemoreceptorthermoreceptorhygroreceptorphotoreceptorproprioceptortrichobothriumtarsal-organslit-sensillumlyriform-organpedipalp-organHaller's-organcontact-chemoreceptorgustatoryolfactorypheromonesemiochemicalkairomoneallomonesynomonecommunicationsignalvibrationseismicairbornevisualchemicaltactilecopulationinseminationspermspermatozoonmedian-apophysisterminal-apophysisparacymbiumcymbiumbulbustegulumsubtegulumradixlamellaprocessapophysisflangehookcoilspiralductreservoirscleriteplatefieldfossapocketreceptaculumspermathecaeglandinsemination-ductuterusuterus-externusuterus-internusvaginagonoporeovipositorovaryoviductfolliclevitellogenesisoogenesisspermatogenesistestisvas-deferensejaculatory-ductseminal-vesiclefecundityfertilityclutch-sizeegg-numberhatchingemergenceballooningaerial-dispersalsilk-draglinegossamermigrationmovementwalkingrunningjumpingclimbingburrowinghidingrefugeshelterdefensepredationpredator-avoidanceantipredatorcrypsiscamouflagemimicryaposematismdeimaticthanatosisautotomyleg-lossregenerationinjurywoundhealingimmune-responsehemocytemelanizationencapsulationnoduleparasiteparasitoidpathogenfungusbacteriumvirusnematodemitegroomingcleaninghygieneself-maintenancesilk-useweb-useprey-captureforaginghuntingambushsit-and-waitactive-huntingsearchingprobingtestingexplorationlearningmemorycognitionbehaviorethologyecologypopulationcommunityecosystembiomebiospherehabitatenvironmentabioticbioticfactortemperaturehumiditymoisturepreci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