List of Families found in the Arid Southwest and Associated Mountain Ranges

Mygalomorphae

  1. Antrodiaetidae
  2. Euctenizidae (Cyrtaucheniidae)
  3. Ctenizidae
  4. Mecicobothriidae
  5. Dipluridae
  6. Theraphosidae

Araneomorphae

  1. Hypochilidae
  2. Filistatidae
  3. Sicariidae
    (=Loxoscelidae)  
  4. Scytodidae
  5. Leptonetidae
  6. Pholcidae
  7. Plectreuridae
  8. Diguetidae
  9. Caponiidae
  10. Segestriidae
  11. Dysderidae
  12. Oonopidae
  13. Mimetidae
  14. Oecobiidae
  15. Uloboridae
  16. Nesticidae
  1. Theridiidae
  2. Mysmenidae
  3. Linyphiidae
  4. Tetragnathidae   
  5. Nephilidae
  6. Araneidae
  7. Lycosidae
  8. Trechaleidae
  9. Pisauridae
  10. Oxyopidae
  11. Zoropsidae
  12. Ctenidae
  13. Agelenidae
  14. Hahniidae
  15. Dictynidae
  16. Amaurobiidae
  1. Titanoecidae
  2. Eutichuridae
  3. Miturgidae
  4. Anyphaenidae
  5. Liocranidae
  6. Phrurolithidae
  7. Clubionidae
  8. Corinnidae
  9. Trachelidae
  10. Zordariidae
  11. Homalonychidae
  12. Prodidomidae
  13. Gnaphosidae
  14. Selenopidae
  15. Sparassidae
    (=Heteropodidae)  
  16. Philodromidae
  17. Thomisidae
  18. Salticidae