Elongatoolithus excellens

† Elongatoolithus excellens is a large oospecies of oviraptorosaurian eggs from the Late Cretaceous of the Gobi Desert, Mongolia. Among the larger Elongatoolithus oospecies, its eggs attain lengths of up to 20 cm, suggesting a relatively large oviraptorosaur parent. Beautifully preserved clutches from the Djadokhta and Nemegt Formations occasionally include embryos, providing rare direct evidence linking egg morphology to specific dinosaur taxa. The Mongolian Cretaceous has yielded the world's b