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folding trapdoor spiders
Atypoides riversi turret (Marshal Hedin).jpg
Antrodiaetus riversi turret
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Arachnida
Order: Araneae
Suborder: Mygalomorphae
Superfamily: Atypoidea
Family: Antrodiaetidae
Gertsch, 1940

Aliatypus Smith, 1908
Antrodiaetus Ausserer, 1871

2 genera, 32 species

The folding trapdoor spiders (Antrodiaetidae) are a small spider family with about 30 species in two genera. They are related to the Atypidae (atypical tarantulas).


Antrodiaetids are found almost exclusively in the USA, in the west (California, Arizona, Nevada, Utah, Oregon, Washington, Idaho), the midwest (Missouri, Kansas, Arkansas, Illinois), and the east (centered in the Appalachian mountains).[1]

Two species (Antrodiaetus roretzi and A. yesoensis) are endemic to Japan. They are considered relict species; two separate vicariance events probably led to the evolution of these two species (Miller & Coyle, 1996).

The three species of the former genus Atypoides are now included in the genus Antrodiaetus (Hendrixson & Bond, 2007).

See also[edit]


  1. ^ Marshal Hedin, personal communication (2006)
  • Miller, J.A & Coyle, F.A. (1996). Cladistic analysis of the Atypoides plus Antrodiaetus lineage of mygalomorph spiders (Araneae, Antrodiaetidae). Journal of Arachnology 24(3):201-213. PDF - Abstract
  • Hendrixson, B.E. & Bond, J.E. (2005). Two sympatric species of Antrodiaetus from southwestern North Carolina (Araneae, Mygalomorphae, Antrodiaetidae). Zootaxa 872:1-19. PDF (A. unicolor, A. microunicolor)
  • Hendrixson, B.E. & Bond, J.E. (2007). Molecular phylogeny and biogeography of an ancient Holarctic lineage of mygalomorph spiders (Araneae: Antrodiaetidae: Antrodiaetus). Molec. Phylogen. Evol. 42: 738-755. doi:10.1016/j.ympev.2006.09.010
  • Platnick, Norman I. (2008): The world spider catalog, version 8.5. American Museum of Natural History.

External links[edit]