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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Arthropoda (arthropods)
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Chelicerata (spiders, mites, scorpions, and relatives)
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Class Arachnida
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Order Araneae
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Family Actinopodidae
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Family Agelenidae
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Family Amaurobiidae
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Family Ammoxenidae
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Family Amphinectidae
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Family Anapidae
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Family Antrodiaetidae
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Family Anyphaenidae
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Family Araneidae
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Family Archaeidae
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Family Atypidae
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Family Austrochilidae
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Family Barychelidae
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Family Caponiidae
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Family Chummidae
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Family Cithaeronidae
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Family Clubionidae
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Family Corinnidae
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Family Ctenidae
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Family Ctenizidae
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Family Cyatholipidae
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Family Cybaeidae
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Family Cycloctenidae
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Family Cyrtaucheniidae
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Family Deinopidae
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Family Desidae
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Family Dictynidae
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Family Diguetidae
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Family Dipluridae
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Family Drymusidae
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Family Dysderidae
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Family Eresidae
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Family Filistatidae
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Family Gallieniellidae
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Family Gnaphosidae
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Family Gradungulidae
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Family Hahniidae
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Family Hersiliidae
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Family Hexathelidae
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Family Holarchaeidae
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Family Homalonychidae
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Family Huttoniidae
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Family Hypochilidae
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Family Idiopidae
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Family Lamponidae
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Family Leptonetidae
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Family Linyphiidae
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Family Liocranidae
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Family Liphistiidae
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Family Lycosidae
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Family Malkaridae
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Family Mecicobothriidae
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Family Mecysmaucheniidae
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Family Micropholcommatidae
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Family Microstigmatidae
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Family Migidae
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Family Mimetidae
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Family Miturgidae
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Family Mysmenidae
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Family Nemesiidae
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Family Nephilidae
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Family Nesticidae
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Family Nicodamidae
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Family Not assigned
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Family Ochyroceratidae
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Family Oecobiidae
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Family Oonopidae
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Family Orsolobidae
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Family Oxyopidae
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Family Palpimanidae
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Family Pararchaeidae
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Family Paratropididae
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Family Periegopidae
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Family Philodromidae
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Family Pholcidae
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Family Phyxelididae
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Family Pimoidae
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Family Pisauridae
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Family Plectreuridae
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Family Prodidomidae
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Family Psechridae
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Family Salticidae
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Family Scytodidae
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Family Segestriidae
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Family Selenopidae
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Family Senoculidae
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Family Sicariidae
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Family Sparassidae
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Family Stenochilidae
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Family Stiphidiidae
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Family Symphytognathidae
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Family Synaphridae
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Family Synotaxidae
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Family Telemidae
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Family Tengellidae
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Family Tetrablemmidae
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Family Tetragnathidae
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Family Theraphosidae
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Family Theridiidae
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Family Theridiosomatidae
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Family Thomisidae
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Family Titanoecidae
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Family Trechaleidae
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Family Trochanteriidae
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Family Uloboridae
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Family Zodariidae
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Family Zoridae
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Family Zorocratidae
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Family Zoropsidae
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