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Genus Aptostichus

Wafer-lid Trapdoor Spider in California (October) - Aptostichus - male Brown nocturnal spider - Aptostichus Male trapdoor - Aptostichus stanfordianus - male Aptostichus atomarius - male Aptostichus simus - female Trapdoor wandering  - Aptostichus stanfordianus - female Aptostichus? - Aptostichus stanfordianus Aptostichus lucerne/serrano - Aptostichus - 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)
Genus Aptostichus
Numbers
There are 40 species in this genus:
A. aguacaliente Bond, 2012....................USA
A. angelinajolieae Bond, 2008....................USA
A. anzaborrego Bond, 2012....................USA
A. asmodaeus Bond, 2012....................USA
A. atomarius Simon, 1891 *....................USA
A. barackobamai Bond, 2012....................USA
A. bonoi Bond, 2012....................USA
A. cabrillo Bond, 2012....................USA, Mexico
A. cahuilla Bond, 2012....................USA
A. cajalco Bond, 2012....................USA
A. chavezi Bond, 2012....................USA
A. chemehuevi Bond, 2012....................USA
A. chiricahua Bond, 2012....................USA
A. dantrippi Bond, 2012....................USA
A. derhamgiulianii Bond, 2012....................USA
A. dorothealangeae Bond, 2012....................USA
A. edwardabbeyi Bond, 2012....................USA
A. elisabethae Bond, 2012....................USA
A. fisheri Bond, 2012....................USA
A. fornax Bond, 2012....................USA
A. hedinorum Bond, 2012....................USA
A. hesperus (Chamberlin, 1919)....................USA
A. huntington Bond, 2012....................USA
A. icenoglei Bond, 2012....................USA, Mexico
A. isabella Bond, 2012....................USA
A. killerdana Bond, 2012....................USA
A. lucerne Bond, 2012....................USA
A. pennjillettei Bond, 2012....................USA
A. mikeradtkei Bond, 2012....................USA
A. miwok Bond, 2008....................USA
A. muiri Bond, 2012....................USA
A. nateevansi Bond, 2012....................USA
A. sarlacc Bond, 2012....................USA
A. satleri Bond, 2012....................USA
A. serrano Bond, 2012....................USA
A. sierra Bond, 2012....................USA
A. simus Chamberlin, 1917....................USA
A. sinnombre Bond, 2012....................USA
A. stanfordianus Smith, 1908....................USA
A. stephencolberti Bond, 2008....................USA
Range
A majority of species are endemic to California. Some taxa also from Arizona, Nevada, Baja California. Novel BG records from Oregon
Print References
Bond JE, MC Hedin, MJ Ramirez, BD Opell. 2001. Deep molecular divergence in the absence of morphological and ecological change in the California coast dune endemic trapdoor spider Aptostichus simus. Molecular Ecology, 10: 899-910.

Bond JE, AK Stockman (2008) An integrative method for delimiting cohesion species: Finding the population-species interface in a group of Californian trapdoor spiders with extreme genetic divergence and geographic structuring. Systematic Biology, 57: 628-646.

Bond, J. E. (2012). Phylogenetic treatment and taxonomic revision of the trapdoor spider genus Aptostichus Simon (Araneae, Mygalomorphae, Euctenizidae). ZooKeys 252: 1-209. (online PDF)