Résumé : About ten dinosaur nests of large megaloolithid-type eggs have been discovered in the new Maastrichtian locality of Toteşti-baraj (Haţeg Basin, Romania). This is the largest dinosaur egg nest site discovered in Romania. Teeth and other micro-remains of vertebrates such as hadrosaurs, ankylosaurs, theropods, lizards and amphibians are associated with the eggs in the sediments, reflecting the great biodiversity of the Haţeg Basin during the Maastrichtian. But the most remarkable collected micro-remains are teeth of mammals representing at present the richest multituberculate collection from the Upper Cretaceous of Europe. © 2002 Académie des sciences/Éditions scientifiques et médicales Elsevier SAS.