Aptostichus

Aptostichus is a genus of North American mygalomorph spiders in the family Euctenizidae, and was first described by Eugène Simon in 1891. They are found predominantly in southern California, United States.

Behavior
Members of the North American genus, Aptostichus, assemble tunnels with side chambers, but they do not close these chambers with additional trapdoors.

Species
it contains forty-one species in the United States and Mexico:
 * Aptostichus aguacaliente Bond, 2012 – USA
 * Aptostichus angelinajolieae Bond, 2008 – USA
 * Aptostichus anzaborrego Bond, 2012 – USA
 * Aptostichus asmodaeus Bond, 2012 – USA
 * Aptostichus atomarius Simon, 1891 (type) – USA
 * Aptostichus barackobamai Bond, 2012 – USA
 * Aptostichus bonoi Bond, 2012 – USA
 * Aptostichus cabrillo Bond, 2012 – USA, Mexico
 * Aptostichus cahuilla Bond, 2012 – USA
 * Aptostichus cajalco Bond, 2012 – USA
 * Aptostichus chavezi Bond, 2012 – USA
 * Aptostichus chemehuevi Bond, 2012 – USA
 * Aptostichus chiricahua Bond, 2012 – USA
 * Aptostichus dantrippi Bond, 2012 – USA
 * Aptostichus derhamgiulianii Bond, 2012 – USA
 * Aptostichus dorothealangeae Bond, 2012 – USA
 * Aptostichus edwardabbeyi Bond, 2012 – USA
 * Aptostichus elisabethae Bond, 2012 – USA
 * Aptostichus fisheri Bond, 2012 – USA
 * Aptostichus fornax Bond, 2012 – USA
 * Aptostichus hedinorum Bond, 2012 – USA
 * Aptostichus hesperus (Chamberlin, 1919) – USA
 * Aptostichus huntington Bond, 2012 – USA
 * Aptostichus icenoglei Bond, 2012 – USA, Mexico
 * Aptostichus isabella Bond, 2012 – USA
 * Aptostichus killerdana Bond, 2012 – USA
 * Aptostichus lucerne Bond, 2012 – USA
 * Aptostichus mikeradtkei Bond, 2012 – USA
 * Aptostichus miwok Bond, 2008 – USA
 * Aptostichus muiri Bond, 2012 – USA
 * Aptostichus nateevansi Bond, 2012 – USA
 * Aptostichus pennjillettei Bond, 2012 – USA
 * Aptostichus sabinae Valdez-Mondragón & Cortez-Roldán, 2016 – Mexico
 * Aptostichus sarlacc Bond, 2012 – USA
 * Aptostichus satleri Bond, 2012 – USA
 * Aptostichus serrano Bond, 2012 – USA
 * Aptostichus sierra Bond, 2012 – USA
 * Aptostichus simus Chamberlin, 1917 – USA, Mexico
 * Aptostichus sinnombre Bond, 2012 – USA
 * Aptostichus stanfordianus Smith, 1908 – USA
 * Aptostichus stephencolberti Bond, 2008 – USA