Monotypic Cybaeidae genera

Willisus is a monotypic genus of North American araneomorph spiders in the family Cybaeidae containing the single species, Willisus gertschi. It was first described by V. D. Roth in 1981, and has only been found in United States.

Cryphoecina is a monotypic genus of Balkan araneomorph spiders in the family Cybaeidae containing the single species, Cryphoecina deelemanae. It was first described by C. Deltshev in 1997, and has only been found in Montenegro.