Entychides

Members of Entychides are distinguished from other Euctenizidae genera by their mygalomorph morphology combined with trapdoor-building behavior. The genus can be separated from the related genus Eucteniza by subtle differences in genitalia and burrow architecture, though precise identification to species level requires examination of mature male pedipalps or female spermathecae.

Species occur in arid and semi-arid regions, constructing silk-lined burrows with hinged trapdoors in soil or rocky substrates. The burrows are typically built in sloped or flat ground with suitable soil consistency for excavation.

Mexico, southwestern United States (Arizona), and Guadeloupe in the Lesser Antilles.

Constructs and maintains trapdoor burrows used for prey capture and shelter. The spider waits behind the closed door, detecting vibrations from passing prey through silk threads extending from the burrow entrance.

• EuctenizaBoth genera belong to Euctenizidae and share trapdoor-building behavior, but Eucteniza species generally have more robust rastella (burrow digging structures) and different genitalic morphology.
• AptostichusAnother euctenizid genus with trapdoor burrows, but Aptostichus is primarily restricted to California and shows different burrow architecture and male genitalia structure.

• mygalomorph
• trapdoor spider
• burrowing spider

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life