Antrodiaetidae

Folding trapdoor spiders Temporal range: Cretaceous–present PreꞒ Ꞓ O S D C P T J K Pg N
Antrodiaetus unicolor , female
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Chelicerata
Class:	Arachnida
Order:	Araneae
Infraorder:	Mygalomorphae
Clade:	Atypoidea
Family:	Antrodiaetidae Gertsch, 1940
Genera
See text.
Diversity
2 genera, 35 species

Antrodiaetidae, also known as folding trapdoor spiders or folding-door 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]

Genera

As of December 2024 ^[update] , the World Spider Catalog accepted the following genera: ^[1]

• Aliatypus Smith, 1908 — United States
• Antrodiaetus Ausserer, 1871 — United States, Japan
• Atypoides O. Pickard-Cambridge, 1883 — United States
• Hexura Simon, 1884 — United States

Name

The name “folding-door” describes how they open or close the entrance to their burrow; they unfold or fold the door.

References

1. "Family: Antrodiaetidae Gertsch, 1940". World Spider Catalog. Natural History Museum Bern. Retrieved 2020-07-24.
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. Archived from the original (PDF) on 2020-10-01. Retrieved 2006-08-23.

• Hendrixson, B.E. & Bond, J.E. (2005). Two sympatric species of Antrodiaetus from southwestern North Carolina (Araneae, Mygalomorphae, Antrodiaetidae). Zootaxa 872:1-19. PDF)

External links

• Images of a folding trapdoor spider