These spiders have a segmented abdomen unlike other groups found today, such as the mygalomorphs, which include well known spider species like tarantulas and funnel-webs. Mesothelae spiders are only ...

The base of the fiddle typically covers the head, with the neck extending down toward the abdomen. The venom of brown recluse spiders is both cytotoxic and hemolytic. This means it can cause ...

and a yellow-orange hourglass marking on its abdomen. The bite is neuropathic like the black widow, but it generally does not spread, so it’s painful but not life threatening. These spiders are ...

No species has all seven, but orb-web weavers have five. Spiders have structures called spinnerets on their abdomen, usually on the underside to the rear. These are the silk-spinning organs. Different ...