only two different groups have been identified, the bothremydids Polysternon and Rosasia, along with an uncommon undetermined Pancryptodiran. Squamate lizards are known only from a few undetermined specimens, and eusuchian crocodiles are known from a specimen with similarities to Allodaposuchus and Musturzabalsuchus. Ornithischias and theropod dinosaurs are not as common as sauropods but still consist of much material. Basal euornithopods and probable ankylosaurians are known from Lo Hueco. The ankylosaurian remains consist of a few vertebrae. Rhabdodon sp. is known from the formation, and is known from a fair amount of elements. Only two theropods have been identified, both Dromaeosauridae indet., one dromaeosaurine and one velociraptorine. Biogeography Titanosaurians were a flourishing group of sauropod dinosaurs during Cretaceous times. Fossils of titanosaurians have been found on all continents and their remains are abundant in a number of Late Cretaceous sites. Nonetheless, the cranial anatomy of titanosaurians is still very poorly known. Ampelosaurus is now the best known sauropod from Europe. Others include Magyarosaurus from Hungary and an unnamed species from Catalonia, Spain. Numerous other fragments and isolated bones may or may not belong to any of these forms. While most titanosaurs are found in the southern continents of Gondwana, several derived species are known from Maastrichtian sediments in the Northern Hemisphere, including Alamosaurus in North America and Opisthocoelicaudia in Asia, indicating that there must have been at least intermittent connections between the northern and southern continents. This seems to be corroborated by the European find of Tarascosaurus, a Late Cretaceous theropod dinosaur similar to the abelisaurids, otherwise known only from the southern continents. Ampelosaurus sp. is a distinct sauropod as it is known from just a braincase. Although the number of sauropod braincases from the Late Cretaceous European archipelago found to date is limited, it shows a significant diversity. The specimen from Lo Hueco resembles the braincase of A. atacis MDE C3–761. References Titanosaurs Maastrichtian life Late Cretaceous dinosaurs of Europe Cretaceous France Cretaceous Spain Fossils of France Fossils of Spain Fossil taxa described in 1995