Tuesday, July 16, 2013

Thinlegged Wolf Spiders: Egg Sacs

The genus Pardosa is made up of lightning-fast, slender-legged Wolf Spiders (Lycosidae). In contrast to other genera, which have convex faces, members of Pardosa have subvertical/converging faces. Thus their posterior lateral eyes (PLE) are somewhat raised above the carapace. They also usually have a wider median longitudinal stripe on the carapace than other genera. Some species have striped legs (the other genera have plain legs), and the long hairs (bristles) make these appear spiked.

But like the rest of Lycosidae, the females drag their cocoons behind them until the eggs hatch and the little ones crawl onto Mom's abdomen. As fast as Mom moves, it's quite a adventure for the spiderlings!

Specimen #1:


Specimen #2 (this girl I had to chase on my hands and knees!):


References:
http://bugguide.net/node/view/3389 (Pardosa)
http://www.americanarachnology.org/JoA_free/JoA_v32_n1/arac-032-01-0055.pdf (review of genus)
http://animaldiversity.ummz.umich.edu/accounts/Pardosa_milvina/ (info on common species, P. milvina)

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