Simonestus is a genus of corinnid sac spiders first described by A. B. Bonaldo in 2000.

Species it contains six species in the Americas: Simonestus occidentalis (Schenkel, 1953) – Venezuela Simonestus pseudobulbulus (Caporiacco, 1938) – Guatemala Simonestus robustus (Chickering, 1937) – Panama Simonestus semiluna (F. O. Pickard-Cambridge, 1899) – Mexico, Guatemala Simonestus separatus (Schmidt, 1971) – Guatemala to Peru Simonestus validus (Simon, 1898) (type) – Venezuela

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