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]

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

^ ^a ^b "Family: Antrodiaetidae Gertsch, 1940". World Spider Catalog. Natural History Museum Bern. Retrieved 2020-07-24.
^ 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 (A. unicolor, A. microunicolor)

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