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Folding trapdoor spiders
Temporal range: Cretaceous–present
Antrodiaetus unicolor, female.jpg
Antrodiaetus unicolor, female
Scientific classification e
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Mygalomorphae
Family: Antrodiaetidae
Gertsch, 1940

See text.

2 genera, 35 species

Antrodiaetidae, also known as folding trapdoor spiders, is a small spider family related to atypical tarantulas. They are found almost exclusively in the western and midwestern United States, from California to Washington and east to the Appalachian mountains.[1] Exceptions include Antrodiaetus roretzi and Antrodiaetus yesoensis, which are endemic to Japan and are considered relict species. It is likely that two separate vicariance events led to the evolution of these two species.[2]

The three species of the former genus Atypoides are now included in the genus Antrodiaetus.[3]


As of May 2019, the World Spider Catalog accepted the following genera:[1]

See also[edit]


  1. ^ a b "Family: Antrodiaetidae Gertsch, 1940". World Spider Catalog. Natural History Museum Bern. Retrieved 2019-05-22.
  2. ^ Miller, J.A; Coyle, F.A. (1996). "Cladistic analysis of the Atypoides plus Antrodiaetus lineage of mygalomorph spiders (Araneae, Antrodiaetidae)" (PDF). Journal of Arachnology. 24 (3): 201–213.
  3. ^ 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.
  • 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)

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