Medical Definition of ARTHRODESIS. : the surgical immobilization of a joint so that the bones grow solidly together: artificial ankylosis. the surgical immobilization of a joint so that the bones grow solidly together. ADVERTISEMENT.
Trapdoor spiders are not particularly harmful to man however, like Tarantulas, the tiny hairs on the legs of some species leave tiny red marks where the toothed hairs on the spiders' feet have clung to the skin. Mouse spiders are also a type of Trapdoor spider with huge chelicerae and may measure up to 35mm in body length.
We have not read anything regarding the bite of a Red Legged Purseweb Spider, however, the fangs do look formidable and we are guessing they might be able to bite a human, though in general, Spiders in the Infraorder Mygalomorphae, which include Tarantulas and Trapdoor Spiders, are not aggressive toward humans.