No Taxon atrata group - 1 species in bugguide's range
No Taxon coloradensis group
No Taxon distincta group
No Taxon lapidicina group
No Taxon milvina group
No Taxon modica group
No Taxon moesta group
No Taxon nigra group - According to Beatrice Vogel's article (see Internet References, below) there are 8 species in the contiguous US, with 5 also in Canada. 6 species are found in Europe and/or Asia
No Taxon saltuaria group
No Taxon sternalis group 5-8 mm
The sternalis group consists of six species west of the Mississippi River:
No Taxon tesquorum group
No Taxon xerampelina group
Spiders in the Pardosa genus have a subvertical/converging face as shown below.
Lycosa-like genera including Hogna, Schizocosa, Trochosa etc. have a convex face as shown below.
Info. provided by Rod Crawford.
According to Bradley, "Common Spiders of North America", Pardosa
can be identified by the nearly perpendicular spines on the hind legs"(2)
(pg. 147) Editor's note: Per communication with Richard A. Bradly this may not apply to all species in the genus (can't find it in the literature) but seems at the very least to be a quick way to separate Pardosa
from similarly sized genera in North America. Will update if I find out more info regarding this. -Laura P.
Keep in mind that Pardosa
closely resemble Acantholycosa
in appearance, especially the shape of the cephalothorax and slenderness of the legs. The distinguishing feature is the number of tibial spines: Acantholycosa
has 5–7 pairs on the ventral side of tibia I, and Pardosa
have 3 pairs, of which the distal pair may be short.(1)
However, North America currently only has one described species that could cause this potential confusion: Acantholycosa solituda
The following 5 species are found in the Rocky Mountain states from New Mexico north through Wyoming.
P. distincta is found throughout the Rocky Mountains, including Canada, and eastward to New England. While P. distincta is one of the most frequently encountered Pardosa species in the Rocky Mountains, the other five species of the group are rarely seen because of their size and restricted choice of habitat. (1)
The Lapponica Group (2 species in bugguide's range) consists of one species in North America and one Holarctic species - Pardosa concinna & Pardosa lapponica.
The Modica Group (23 species in bugguide's range) The 17 U.S. species are Pardosa albomaculata, Pardosa anomala, Pardosa bucklei, Pardosa confusa, Pardosa crassistyla, Pardosa dromaea, Pardosa groenlandica, Pardosa labradorensis, Pardosa lowriei, Pardosa modica, Pardosa ourayensis, Pardosa sinistra, Pardosa tetonensis, Pardosa tristis, Pardosa vogelae, Pardosa wasatchensis, Pardosa wyuta.