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

Species Steatoda triangulosa

A revision of the genus Achaearanea (Araneae: Theridiidae)
By Hajime Yoshida
Acta Arachnologica 57(1): 37-40, 2008
This is the publication in which all North American Achaearanea were moved into Cryptachaea, Hentziectypus, and Parasteatoda... thus we no longer have genus Achaearanea in BugGuide's range.

PDF available online for free from publisher's website:

American spiders of the genus Argyrodes (Araneae, Theridiidae)
By Harriet Exline & Herbert W. Levi
Bulletin of the Museum of Comparative Zoology Harvard 127(2):75-204, 1962
Online version available from the Biodiversity Heritage Library:

The spider genera Enoplognatha, Theridion, and Paidisca in America north of Mexico (Araneae, Theridiidae)
By H.W. Levi
Bulletin of the American Museum of Natural History 112, article 1, 123 p., 1957
Full text (47Mb)

Systematics and evolution of ground spiders revisited (Araneae, Dionycha, Gnaphosidae). Cladistics
By Azevedo, G. H. F, Griswold, C. E. & Santos, A. J.
Cladistics 34(6): 579-626, 2018

Nearctic genera of the spider family Agelenidae (Arachnida, Araneida)
By Vincent Roth & Patricia Brame
American Museum Novitates 2505: 1-52, 1972
Full Text

I filed this book under Entelegynes because many of the species described in it are no longer part of the Agelenidae.

The morphology and phylogeny of dionychan spiders
By Ramírez, Martín J.
Bulletin of the American Museum of Natural History, 2014

A revision of the spider genus Zorocrates
By Platnick, Norman I.; Ubick, Darrell
American Museum Novitates, no. 3579, 2007

The spider subfamily Clubioninae of the United States, Canada and Alaska (Araneae: Clubionidae)
By Robert J. Edwards
Bulletin of the Museum of Comparative Zoology Harvard 118: 365-436, 1958
Full Text at the Biodiversity Heritage Library