Besides the before mentioned fenestra, the parietals also have a "postparietal fenestra", something rarely seen outside of Dicraeosauridae. A triradiate postorbital bone is present in Europasaurus, which evolved as the fusion of the postfrontal and postosbital bone of more basal taxa. Between the anterior and ventrally projecting processes the postorbital forms the margin of the orbit, and between the posterior and ventral processes it borders the infratemporal fenestra.
Besides the previously mentioned fenestra, the parietals also have a "postparietal fenestra", something rarely seen outside of Dicraeosauridae. A triradiate postorbital bone is present in Europasaurus, which evolved as the fusion of the postfrontal and postosbital bone of more basal taxa. Between the anterior and ventrally projecting processes the postorbital forms the margin of the orbit, and between the posterior and ventral processes it borders the infratemporal fenestra.