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Pleased to meet you tylenol sever sinus The fossil had all the typical characteristics found in the brains and ganglia of horseshoe crabs and scorpions. This means the ancestors of spiders and their relatives lived alongside the ancestors of crustaceans in the Lower Cambrian, Prof. Strausfeld explained to the BBC. He added that their prominent claw-like appendages clearly were used for grasping and holding, saying also that based on their location, scientists can now say that the biting mouthparts in spiders and their kin evolved from these appendages.
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