Spiders. Largest order of arachnids. Body consists of two segments: the cephalothorax and abdomen. Using the chelicerae with fangs, they can inject venom. Arachnidium is a glandular organ that secretes material (silk) used to produce a web.
What is ARANEAE?
ARANEAE: "Species from the order Araneae can be found worldwide, on every continent except on the Antarctica."
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