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

Discussion of 2018 gathering

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington

Large Male Araneus: A Range and Habitus-based Guide

The following spiders are known as the Diadematus Group. Information is largely from Levi's 1971 bulletin.


Both East & West Range

A. gemmoides (not found in the southeast or extreme NE)


A. nordmanni (though absent from the central states and the extreme SE)


A. marmoreus (though absent from the southwest)


A. trifolium


Only Northern US & Canada

A. corticarius (northeastern US, but most of Canada)


A. groenlandicola (northeastern US, but most of Canada)

A. iviei (northeastern US, but most of Canada)

A. diadematus


A. saevus


A. washingtoni (only the extreme northeastern area)

A. yukon (only extreme northwestern Canada)


Only Southern US
A. santarita (known only from AZ)

Only Eastern Range

A. bicentarius (there is one data point in NM)


A. cavaticus


Only Western Range

A. andrewsi

A. gemma


A. illaudatus