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

Subgenus Ephippiochthonius


Order Pseudoscorpiones. In: Zhang Z.-Q. (ed.) Animal biodiversity: An outline of higher-level classification...
By Harvey M.S.
Zootaxa 3703: 34–35, 2013

Photographic key to the Pseudoscorpions of Canada and the adjacent USA
By C.M. Buddle
Canadian Journal of Arthropod Identification No. 10, 2010
Online version
Full text
A brand-new helpful source with a key to 35 taxa (33 genera + some species) representing 9 families. The introduction provides general info on the order and the fauna of the region.

Please keep in mind that the key uses no features that are visible on a general dorsal view, so sorting pseudoscorpions from live photographs even to families is virtually impossible. All the diagnostic characters are microscopic.

Amazing Arachnids
By Jillian Cowles
Princeton University Press, 2018
“This engaging book is beautifully written and illustrated, and should appeal to anyone interested in natural history. I enjoyed reading Amazing Arachnids.” —Paula Cushing, Denver Museum of Nature and Science

“Cowles has assembled a fascinating collection of phenomena pertaining to arachnids and presented it with a narrative that is simply a joy to read.” —W. David Sissom, West Texas A&M University

Death comes on two wings: a review of dipteran natural enemies of arachnids
By Gillung J.P., Borkent C.J.
J. Arachnol. 45: 1–19, 2017

Catalogue of the Smaller Arachnid Orders of the World: Amblypygi, Uropygi, Schizomida, Palpigradi, Ricinulei and Solifugae
By Mark S. Harvey
CSIRO Publishing, Australia, 2003

A collection of spiders and harvestmen from two caves in Ontario and Newfoundland, Canada (Araneae, Opiliones)
By Wilfried Breuss
Contributions to Natural History (Bern) 12: 297-313, 2009
At the time of adding this reference, the full text was available online HERE.

Two European Arachnids New to the United States
By William B. Muchmore
Entomological News 74: 208-210, 1963
Full Text

First record of the European opilionid, Trogulus tricarinatus, in the USA. Also, a record of the European pseudoscorpion, Roncus lubricus, having been introduced to a greenhouse, but the population disappeared (apparently eradicated by the continued application of pesticides).

A List of the Spiders of the Grand Teton Park Area, with Descriptions of Some New North American Spiders
By Lowrie, Donald C. & Willis J. Gertsch
American Museum Novitates, 1736:1-29, 1955
Lowrie, Donald C. & Willis J. Gertsch. 1955. A List of the Spiders of the Grand Teton Park Area, with Descriptions of Some New North American Spiders. American Museum Novitates, 1736:1-29.

http://digitallibrary.amnh.org/dspace/handle/2246/4713