Foto de stock - Chilean tarantula, Grammostola porteri, showing chelicerae. The chelicerae are two double-segmented appendages located just below the eyes and directly forward of the mouth. The chelicerae contain the venom glands that vent through the fangs. The fangs are hollow extensions of the chelicerae that inject venom into prey or animals that the tarantula bites in defense, and they are also used to masticate. It is one of the species of tarantulas best known and marketed because of its large size and zero aggressiveness. It reaches about 20 cm in diameter with the legs distended. It is endemic to Chile. It feeds on insects and worms. It has a poison, which although not very potent, causes localized pain, swelling and malaise. She also has stinging hair that she can release as a defense if she feels threatened. These hairs cause irritation of the mucous membranes of the nose and eyes. Portugal