- D050 -

Acari Palpigradi Scorpiones Amblypygi Pseudoscorpiones Solifugae Araneae Ricinulei Thelyphonida Opiliones Schizomida Spiders Araneae Spiders have abdominal silk organs male pedipalps modified into sperm transfer organs and venom delivered through the chelicerae secondarily lost in some spiders. Adult body size ranges from less than 1 to 100 mm. They are diverse and abundant worldwide with more than 50000 described species. Whip Spiders Amblypygi Amblypygi are a nocturnal group of arachnids commonly called whip spiders or tailless whip scorpions not to be confused with spiders in the order Araneae or whip scorpions also called vinegaroons that belong to the related order Thelyphonida.