Definition
The annelids, also known as the segmented worms, are animals that comprise the phylum Annelida. The phylum contains over 22,000 extant species, including ragworms, earthworms, and leeches. The species exist in and have adapted to various ecologies – some in marine environments as distinct as tidal zones and hydrothermal vents, others in fresh water, and yet others in moist terrestrial environments.
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ColumbiaBryozoaBuddingBurgess ShaleBurgessochaetaBurrowCITESCaelestesCalcareous spongeCalciumCaldipriscotaCaldisericotaCaldithrixCalescibacteriotaCambrianCamera eyeCanadia (annelid)CanalipalpataCanglongiotaCapillaryCapitellidaCapitellidaeCarbon dioxideCarboniferousCell (biology)Central nervous systemCentroneuraliaCephalochordateCephalopodCercozoaCestodaChaetaChaetognathaChaetopteridaeChaetopteriformiaChaetopterusCharles DarwinCharophytaChelicerataChemoautotrophicChemoreceptorChitinChitonChlamydiotaChloragogen cellChlorocruorinChloroflexotaChlorophytaChordateChromadoreaChrompodellidChrysiogenotaChytridiomycotaCiliaCiliateCirculatory systemCirratuliformiaCirrus (biology)CladisticsClass (biology)Cleavage (embryo)ClitellataClitellateClitellumCloacimonadotaCloudinaCnidariaCnidarianCoelomCollagenCompound eyeConiferConnective tissueConvergent evolutionCoprothermobacterotaCopulation (zoology)Coral reefCosmopoliotaCretaceousCrinoidCrinozoaCryosericotaCryptistaCtenophoraCuticleCyanobacteriaCycadCycliophoraDecompositionDeferribacterotaDeferrimicrobiotaDeinococcotaDemospongeDermisDeuterostomeDeuterostomesDeuterostomiaDevonianDiaphoretickesDickinsoniaDictyoglomusDicyemidaDinoflagellateDiurodrilusDodecaceriaDomain (biology)DormiibacterotaDoushantuo FormationDubious speciesEPPO CodeEarthwormEarthwormsEcdysozoaEchinodermEchinozoaEchiuraEchiuranEchiuransEcosystemEctoproctaEdiacaranEdiacaran biotaEffluvivivacotaElectryoneotaElulimicrobiotaElusimicrobiotaEmbryophyteEncyclopedia of LifeEncyclopædia BritannicaEncyclopædia Britannica Eleventh EditionEndomyxaEnopleaEntoproctaEpidermis (skin)EpitheliomuscularErrantiaEuarthropodaEuglenozoaEukaryoteEumetazoaEunicidaEunicidaeEvolutionary gradeExcretionExternal fertilizationExtraterrestrial lifeFamily (biology)FatFauna EuropaeaFecalFermentibacterotaFervidibacterotaFibrobacterotaFidelibacterFilter feedingFishing baitFlagellateFlatwormFlatwormsFlowering plantFollicle (anatomy)Food chainFornicataFungusFusobacteriotaGangliaGastropodaGastrotrichGastrotrichaGemmatimonadotaGenusGeoarchaeotaGeometer mothGiant Gippsland earthwormGillGinkgophytaGlandGlaucophyteGlobal Biodiversity Information FacilityGlomeromycotaGlycogenGnathifera (Spiralia)Gnathifera (clade)GnathostomulidGnathostomulidaGnetophytaGoldiibacteriotaGonadGreen sulfur bacteriaGut (zoology)GymnolaemataHadarchaeotaHadesarchaeotaHaptophyteHeilongiotaHemichordateHemimastigophoraHemocoelHemoglobinHermaphroditeHeteroloboseaHexactinellidHinthialibacterotaHirudineaHirudinomorphaHirudo medicinalisHornwortHuberarchaeotaHugh ChisholmHydrogen sulfideHydrogenedentotaHydrothermal ventHydrothermal ventsHydrothermarchaeotaHydrothermotaHyphochytriomycetesINaturalistIUCNIainarchaeotaIncertae sedisInorganicIntegrated Taxonomic Information SystemInterim Register of Marine and Nonmarine GeneraInvertebrateJean-Baptiste LamarckJellyfishJurassicKapaibacteriotaKimberellaKinorhynchaKiritimatiellotaKootenayscolexKrumholzibacteriotaKryptoniotaKryptotrochozoaLamellibrachiaLarvaLateral undulationLatescibacterotaLatinLatin languageLeaf litterLeechLeechesLentisphaerotaLernaellotaLifeLimnognathiaList of annelid familiesLithacetigenotaLiverLiverwortLobatocerebrumLong branch attractionLophophorataLophophorateLophophoratesLophophoreLophotrochozoaLophotrochozoanLoriciferaLycophyteMachaeridia (annelid)MacinerneyibacteriotaMagelonidaeMalawimonadaMaldanomorphaMargulisiibacteriotaMarine sedimentMedusozoaMesentery (zoology)MesotheliumMesozoaMetamericMetamorphoseMetanephridiaMetanephridiumMetastasisMethaneMethanobacteriotaMethylomirabilotaMiaolingianMicrarchaeotaMicrocaldusMicrochaetus rappiMicrognathozoaMicrosurgeryMicrovilliMicrovillusMineralMinisyncoccotaMiteMitochondrionModuliflexotaMolecular phylogeneticsMolluscMolluscaMoltMonogeneaMonogonontaMorphogenesisMossMucous membraneMucusMuiribacteriotaMuscleMycoplasmatotaMyoscolexMyriapodaMyxosporeaMyxozoaMyzostomidaNanobdellotaNanohalarchaeotaNational Center for Biotechnology InformationNebulidiaNematodeNematoidaNematomorphaNemerteaNemerteanNemertodermatidaNeocallimastigomycotaNeogeneNephridiaNephrozoaNervous systemNeuronNezhaarchaeotaNibbleridiaNitrogenNitrosediminicolotaNitrospinotaNitrospirotaNuchal organOcelliOchrophyteOligochaetaOligochaeteOmnitrophotaOnychophoraOomyceteOpen Tree of LifeOpheliidaOrbiniidaOrdovicianOrgan (biology)Organic materialOrthonectidaOvaryOvumOweniidaeOxygenPack saddlePalaeoannelidaPaleobiology DatabasePaleogenePalolo wormPalpataPanarthropodaPancrustaceaParaHoxozoaParabasalidParakaryonParaphylyParapodiaParapodiumParasiteParcunitrobacterotaParvarchaeotaPenisPeregrinibacteriotaPeriproctPeristalsisPeristomiumPerkinseaPermianPeter Chalmers MitchellPetroleum seepPharynxPhoronidPhoronidaPhragmochaetaPhragmochaeta canicularisPhylactolaemataPhyllodocidaPhyllodocidaePhylogenetic analysisPhylogenetic treePhylumPicozoaPlacozoaPlanctomycetotaPlanktonPlanulozoaPlatytrochozoaPleistoannelidaPlesiomorphicPolychaetaPolychaetePolygordiidaePoseidoniotaPreaxostylaPrecambrianPriapulidaProboscisProstomiumProteinProtistProtodrilidaProtodriliformiaProtonephridiaProtostomeProtostomesProtostomiaPrototrochPsammodrilidaePseudomonadotaPteridophytePterobranchiaPupaPygidiumQinglongiotaRagwormRed algaeRespiration (physiology)Respiratory pigmentRetariaRhodelphisRhodothermotaRifleibacteriotaRotiferRotiferaRouphozoaRyujiniotaSabellidaSabellidaeSabelliditidaSalinellaSalivaSamoaScalidophoraScolecidaSea anemoneSecernenteaSecretionSedentariaSedimentSegmental ganglionSegmentation (biology)SeisonidaeSeptumSessility (zoology)SetaSexShrewSiboglinidaeSilurianSimon Conway MorrisSipunculaSipunculidaSirius PassetSister groupSmall shelly fossilSoft-bodied organismsSoilSoil fertilitySpeciesSpermSpermathecaSpionidaSpiraliaSpirochaeteSpongeSpongiamicotaStatocystStenolaemataStorkSumerlaeotaSuperphylaSymbionSymbioticSymmetry in biologySynergistotaSysuimicrobiotaTangaroaeotaTardigradeTaxonTaxonomy (biology)TectimicrobiotaTeloblastTelonemiaTerebellidaTerebelliformiaTertiary periodThe EconomistThe Formation of Vegetable Mould Through the Action of WormsThermodesulfobacteriotaThermomicrobiotaThermoproteotaThermotogaeTianyaibacteriotaTidal zoneTommotiidsTrace fossilTraction (engineering)TrematodaTrematodeTriassicTriploblastyTrochophoreTumorTunicateTurbellariaTusk shellUndinarchaeotaUreaUrineVeinVentral nerve cordVerrucomicrobiotaVertebrateVestimentiferaVulcanimicrobiotaWenghuiiaWhirling diseaseWikidataWikispeciesWilliam Carmichael McIntoshWirthibacterotaWiwaxiaWorld Register of Marine SpeciesWufengellaXenacoelomorphaXenambulacrariaYolkZhuqueibacterotaZhurongbacterotaZincZygomycota
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