Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Genus Antrodiaetus

Unknown Spider - Antrodiaetus Antrodiaetus unicolor - male Antrodiaetus riversi - Atypoides riversi Adult female - Antrodiaetus pacificus - female Adult male with silk retreat? - Antrodiaetus pacificus - male male Antrodiaetus pugnax - Antrodiaetus pugnax - male
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Mygalomorphae (Mygalomorphs)
Family Antrodiaetidae (Folding-door Spiders)
Genus Antrodiaetus
Synonyms and other taxonomic changes
First described in 1871 by Anton Ausserer

Three species in genus Atypoides transferred to Antrodiaetus
Explanation of Names
Greek antrodiaitos (αντροδιαιτος)- "living in caves", from antron (αντρον)- "cave" + diaita (διαιτα)- "way of life, dwelling"
Gender: Masculine
Numbers
19 species found in the USA
Identification
The shape and macrosetae of the first tibia in the ventral and lateral views can be used to identify males. See key and figures. (1)

A. pacificus males have a straight-looking tibia:

A. pugnax has a ventral swelling with large macrosetae on the swelling:
Range
Range maps can be found here. (1)

east of Rocky Mountains:
A. hadros (Coyle, 1968) - USA
A. lincolnianus (Worley, 1928) - USA
A. microunicolor Hendrixson & Bond, 2005 - USA
A. robustus (Simon, 1891) - USA
A. unicolor (Hentz, 1842) - USA



west of Rocky Mountains:

A. apachecus Coyle, 1971 - USA
A. ashlandensis Cokendolpher, Peck & Niwa, 2005 - USA
A. cerberus Coyle, 1971 - USA
A. coylei Cokendolpher, Peck & Niwa, 2005 - USA
A. effeminatus Cokendolpher, Peck & Niwa, 2005 - USA
A. gertschi (Coyle, 1968) - USA
A. hageni (Chamberlin, 1917) - USA
A. metapacificus Cokendolpher, Peck & Niwa, 2005 - USA
A. montanus (Chamberlin & Ivie, 1935) - USA
A. occultus Coyle, 1971 - USA
A. pacificus (Simon, 1884) - USA
A. pugnax (Chamberlin, 1917) - USA
A. riversi (O. P.-Cambridge, 1883) - USA
A. stygius Coyle , 1971 - USA


Pertaining only to Cowlitz County, WA - I'm sorting pitfall samples from a forest-practices study in SW Washington (currently working on Cowlitz County stuff) and there are a ton of A. pugnax - lots more pugnax than pacificus - which was a big surprise to me! Rod Crawford 11/27/12
Print References
Cokendolpher, J. C., Peck, R. W. & Niwa, C. G. (2005). Mygalomorph spiders from southwestern Oregon, USA, with descriptions of four new species. Zootaxa 1058: 1-34.
Coyle, F. A. (1968). The mygalomorph spider genus Atypoides (Araneae: Antrodiaetidae). Psyche, Cambridge 75: 157-194. (online PDF)
Coyle, F. A. (1971). Systematics and natural history of the mygalomorph spider genus Antrodiaetus and related genera (Araneae: Antrodiaetidae). Bulletin of the Museum of Comparative Zoology at Harvard College 141: 269-402. (online PDF)
Hendrixson BE, Bond JE (2007) Molecular phylogeny and biogeography of an ancient Holarctic lineage of mygalomorph spiders (Araneae: Antrodiaetidae: Antrodiaetus). Molecular Phylogenetics and Evolution, 42: 738-755.
Internet References
Works Cited
1.Systematics and natural history of the mygalomorph spider genus Antrodiaetus and related genera (Araneae: Antrodiaetidae)
Frederick A. Coyle. 1971. Bulletin of the Museum of Comparative Zoology Vol 141 (6): 269-402.