Keying out the Amaurobidae, lack of a cribellum and two teeth on the retromargin of the chelicerae (arrow) leads to the genus
Wadotes; three or more teeth would be
Coras*. Those are the outer mouth parts (endites and labium) visible near the upper-left margin of the image.
Habitus image (by Tom Murray) here:
* Those were the criteria established in 1925 by R. V. Chamberlin, when he studied the ecribellate North American species previously placed in
Coelotes and split them into two new genera:
Wadotes Chamberlin, 1925 and
Coras Chamberlin, 1925.
Contributed by
Kevin Pfeiffer on 17 November, 2010 - 8:40am
Last updated 25 February, 2011 - 8:18pm