Megalostrata is a genus of corinnid sac spiders first described by Ferdinand Karsch in 1880.

Species it contains four species: Megalostrata bruneri (Bryant, 1936) – Cuba Megalostrata depicta (O. Pickard-Cambridge, 1895) – Mexico Megalostrata monistica (Chamberlin, 1924) – Mexico Megalostrata raptor (L. Koch, 1866) (type) – Mexico to Panama

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