About Atypoides riversi O.Pickard-Cambridge, 1883
Atypoides riversi, commonly called the turret spider, is a species of mygalomorph spider that belongs to the family Antrodiaetidae. This is a medium-sized spider native to Northern California. It builds a burrow that features a turret constructed from soil, vegetation, and silk. Adults reach 13 to 18 millimetres, or 0.51 to 0.71 inches, in total length, and females are larger than males.