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folding trapdoor spiders
Antrodiaetus unicolor, female.jpg
Antrodiaetus unicolor, female
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

Antrodiaetidae is a small spider family, known as folding trapdoor spiders. There are about 30 species in two genera (Aliatypus and Antrodiaetus). They are related to the Atypidae (atypical tarantulas).


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

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]


  • 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]