Atypoides riversi, known as turret spider, is a species of mygalomorph spider in the family Antrodiaetidae. It is a medium-sized spider native to Northern California that construct burrows with a cork-like trapdoor made of soil, vegetation and silk. This spider's length is 13 to 18 millimetres (0.51 to 0.71 in) long, though females are larger than males. Atypoides is a genus of North American folding trapdoor spiders. It was first described by Octavius Pickard-Cambridge in 1883, and it has only been found in United States. It was synonymized with the genus Antrodiaetus in 2007, but was restored to its former independent status in 2019. As of November 2021 it contains only three species: A. gertschi, A. hadros, and A. riversi.