abelisaurid Majungasaurus. A variety of extinct mammals have also been discovered, such as gondwanatheres and non-placental eutherians, the former reaching large sizes such as Vintana. The skull of Majungasaurus, a large abelisaurid theropod, was discovered in 1996. It is similar to species found in India and Argentina, indicating that land bridges between the fragments of the former supercontinent of Gondwana still existed in the late Cretaceous, far later than was previously believed. The most likely occurrence was a land bridge allowing animals to cross from South America to Antarctica, and then up to India and Madagascar. Majungasaurus was the largest predator in its environment, while the only known contemporaneous large herbivores were sauropods like Rapetosaurus. Scientists have suggested that Majungasaurus specialized in hunting sauropods. Majungasaurus tooth marks on Rapetosaurus bones indicate that it at least fed on these sauropods, whether or not it actually killed them. Typically, titanosaurs were unusual among sauropods in that they coexisted with large ornithischian dinosaurs such as ceratopsids, hadrosaurs, and ankylosaurs. However, Rapetosaurus was atypical among titanosaurs in that it shared the Mahajanga basin with only one other large herbivore, another titanosaur. Smaller herbivores were rare, with only one, Simosuchus, being discovered during over 100 years of collection in that area. Due to the absence of ornithischian dinosaurs, it is suggested that prehistoric Madagascar saw a different herbivore community dynamic than was seen elsewhere in the Cretaceous. References Sources Kristina Curry Rogers, and Catherine A. Forster. 2004. "The skull of Rapetosaurus krausei (Sauropoda: Titanosauria) from the Late Cretaceous of Madagascar". Journal of Vertebrate Paleontology, 24(1), pages 121–144. Abstract at BioOne External linksPaleontology News — Rapetosaurus from the Science Museum of Minnesota.Stony Brook Paleontologists Discover New Dinosaur and Name It in Honor of One of Their Own from Stony Brook University.New Dinosaur Species Found from Time for Kids Online.Skeleton of New Dinosaur "Titan" Found in Madagascar from National Geographic.Dino skull fills knowledge gap from the BBC.New Madagascar Dinosaur Discoveries from the T. Rex'' Museum. A press release, from the National Science Foundation, including a reconstruction (illustration). Prehistoric animals of Madagascar Late Cretaceous dinosaurs of Africa Dinosaurs of India and Madagascar Lithostrotians Maevarano fauna Maastrichtian genera Fossil taxa described in 2001 Taxa named by Kristina Curry Rogers Taxa named by Catherine Forster