Willisus

{{Short description|Genus of spiders}}

{{Speciesbox

|taxon=Willisus gertschi

|authority=Roth, 1981

|parent_authority=Roth, 1981

}}

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,{{cite journal|last=Roth|first=V. D.|year=1981|title=A new genus of spider (Agelenidae) from California exhibiting a third type of leg autospasy.|journal=Bulletin of the American Museum of Natural History|pages=101–105|volume=170}} and has only been found in United States.{{cite journal|title=Gen. Willisus Roth, 1981|website=World Spider Catalog Version 20.0|access-date=2019-06-07|year=2019|publisher=Natural History Museum Bern|url=http://www.wsc.nmbe.ch/genus/1045|doi=10.24436/2}}