The holotype of the small sauropod dinosaurAstrodon pusillusLapparent and Zbyszewski, 1957, from the Kimmeridgian (Upper Jurassic) of Portugal is shown to be the remains of a juvenile individual of the stegosaurDacentrurus. The records ofAstrodonfrom the Upper Jurassic of North America and the Lower Cretaceous of Africa are based on material of juvenile sauropods. However, teeth from the Lower Cretaceous of Portugal are correctly referred toAstrodonasA. valdensis(Lydekker). A review is presented of the intercontinental genera that the Late Jurassic and Early Cretaceous faunas of Western Europe shared with faunas of corresponding ages in North America and Africa.