REN R205 Study Guide - Final Guide: Araneomorphae, Pauropoda, Symphyla
6 Apr 2016
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Hangs down, crosses: spiders: fangs, other groups: chewing pincer-like jaws. 2 main body parts: cephalothroax (head + thorax) head and thorax fused, abdomen. Fangs articulate crosswise small, take a huge variety of forms webs to catch insects; others pursue them by stealth venom, but only a few are dangerous to people. Mites are immensely diverse; range from economically destructive to beneficial (most are neutral) Similar to spiders but only one body part . Mandibles too weak to pierce human skin; no venom glands. Lacks long tail with stinger of true scorpions. Pincers and an elongate abdomen with a sting at the tip. Sting used to immobilize prey, and can be used to defense. Only 1 us species is dangerous to people. First pair of legs have long filamentous or whiplike tips used as feelers. Long filament that extends from the end of the abdomen. Possess pincers, not as enlarged as the others.
