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Family Euctenizidae - Wafer-lid trapdoor spiders

Trapdoor/Cyrtaucheniid outed - Promyrmekiaphila clathrata Eucteniza - Eucteniza relata - female Trapdoor Spider - Myrmekiaphila - female Southern Coastal Dune Trapdoor Spider - Aptostichus simus - male Brown nocturnal spider - Aptostichus Aptostichus simus - female Aptostichus atomarius - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Mygalomorphae (Mygalomorphs)
Family Euctenizidae (Wafer-lid trapdoor spiders)
Numbers
Seven described genera in US + Canada
Print References
Bond, J. E. & Opell, B. D. (2002). Phylogeny and taxonomy of the genera of south-western North American Euctenizinae trapdoor spiders and their relatives (Araneae: Mygalomorphae: Cyrtaucheniidae). Zoological Journal of the Linnean Society 136: 487-534. (online PDF)

Bond et al 2012 A Reconsideration of the Classification of the Spider Infraorder Mygalomorphae (Arachnida: Araneae) Based on Three Nuclear Genes and Morphology (online PDF)