I. Mateus et al., CLUTCHES, EGGS AND EMBRYOS OF THERAPOD DI NOSAUR IN THE UPPER JURASSIC OF LOURINHA, PORTUGAL, Comptes rendus de l'Academie des sciences. Serie II. Sciences de la terre et des planetes, 325(1), 1997, pp. 71-78
Several well preserved clutches of dinosaurs have been discovered in t
he upper Kimmeridgian/Tithonian of Lourinha (Estramadur Province, Port
ugal). Some eggs of one clutch contained embryo elements of a theropod
dinosaur. The egg-shell resembles that of eggs which have been discov
ered in the Upper Jurassic of Colorado.