Dysdera is a genus of spider. A British species - Dysdera crocata - has enormous opposable fangs which it uses to kill its woodlouse prey.
Found on http://www.probertencyclopaedia.com/browse/BD.HTM
D. fuscipes D. mucronata D. seclusa D. scabricula D. vivesi D. atlantica D. caeca D. drescoi D. lucidipes D. mauritanica Dysdera is a genus of spiders from the family Dysderidae, with more than 200 species. They occur mostly in Eurasia from Central Asia to Spain, extending into northern Africa (e.g. Morocco, Egypt, Ethiopia). However, at least two
Found on http://en.wikipedia.org/wiki/Dysdera
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