Arthropods spider venoms

A few extremely toxic and supertoxic chemicals are listed in Table 2, along with their environmental sources and toxicity targets. Some of these are toxins found in the venoms of poisonous snakes or in the tissues of certain species of animals. Dr. Findlay Russell, who has made enormous contributions to our understanding of the nature of animal toxins, their modes of biological action, and the procedures for treating people who have been envenomed or poisoned, estimates that there are about 1200 known species of poisonous or venomous marine animals, countless numbers of venomous arthropods (spiders), and about 375 species of dangerous snakes (out of a total of about 3500 species). 

Spiders. Family name for the Araneae, with more than 30000 species, belonging to the arachnids (Arach-nida), not to the insects. These arthropods, to which the scorpions (see scorpion venoms), mites (with ticks and red spider mites), and also daddy longlegs belong, have 4 pairs of legs (insects only 3), 2 mandibles (chelicera), and 2 maxillary palpi (pedipalpi) as well as 1 -4 pairs of separate eyes. A tube-like poison... 

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