About
Majungasaurus was a formidable that ruled Madagascar during the final years of the dinosaur age, from about 70 to 66 million years ago. Like its relatives, it possessed the characteristic abelisaurid features: a short, deep skull, tiny forelimbs even more reduced than those of Tyrannosaurus, and a single rounded horn protruding from the top of its head. This horn, along with thickened bone on the skull roof, initially led some researchers to mistake skull fragments for those of a .
What makes Majungasaurus truly remarkable is the compelling evidence that it practiced cannibalism. Multiple Majungasaurus bones bear tooth marks that precisely match the distinctive teeth of Majungasaurus itself. Whether this represents active hunting of its own species or opportunistic scavenging remains debated, but such direct evidence of dinosaur-on-dinosaur consumption within the same species is exceptionally rare in the fossil record.
The first fossils were discovered in 1896 by a French expedition to Madagascar, though remains caused considerable taxonomic confusion for decades. The species wasn't properly understood until spectacular skull material emerged in the 1990s from the Maevarano Formation. Today, Majungasaurus is one of the most completely known theropods from the Southern Hemisphere, with numerous specimens including nearly complete skulls and much of the skeleton.
Majungasaurus lived alongside the bizarre herbivore Rapetosaurus and the crocodilian Mahajangasuchus in a semi-arid floodplain environment. Its relatively robust build and powerful jaws suggest it was a dominant , well-adapted to taking down large prey — including, occasionally, members of its own species.
Explore the anatomy
5 featuresA single rounded bump on the forehead made this dinosaur so weird-looking that early scientists thought they'd found a dome-headed pachycephalosaur instead! CT scans show the bump was made of thickened, rough bone rather than a true spike — probably used to show off or headbutt rivals, not to hunt.
The skull was unusually tall and short compared to most meat-eating dinosaurs, with rough, pitted bone across the snout that probably anchored tough, scaly skin. Those deep jaws packed a powerful bite — perfect for clamping down on large, struggling prey and not letting go.
Those arms make T. rex look long-limbed! The upper arm bone was incredibly short, and the fingers were fused together into basically useless nubs. Weirdly, this extreme arm shrinkage evolved separately from tyrannosaurs — proof that nature came up with the same bizarre solution twice.
Some Majungasaurus bones have deep grooves that perfectly match the teeth of... other Majungasaurus. These marks on leg bones follow the same patterns modern predators leave when stripping meat from a carcass — some of the best fossil evidence that any dinosaur ate its own kind. Whether they hunted each other or just scavenged dead bodies remains a mystery.
Forget speed — these legs were built for power. The thick, column-shaped bones had a short shin compared to the thigh, a combo that biomechanics tells us means slow but strong movement. This wasn't a chase-you-down predator; it was an ambush hunter, lurking near water sources where prey had to come to drink.
Where Majungasaurus Roamed
During the Late Cretaceous, Majungasaurus stalked the semi-arid floodplains of Madagascar, an island that had recently separated from the Indian subcontinent as Gondwana continued its fragmentation. This isolated landmass featured seasonal rivers, coastal plains bordering the young Indian Ocean, and a warm climate marked by pronounced dry seasons that shaped both the landscape and the unique fauna that evolved there.
Keep exploring the vault
Saltasaurus
Saltasaurus loricatus
Majungasaurus is known from extensive feeding trace evidence including tooth marks on sauropod bones in Madagascar.
Carnotaurus
Carnotaurus sastrei
As fellow abelisaurid apex predators of similar size (Majungasaurus ~6.5m, Carnotaurus ~7.5m), they occupied equivalent ecological niches as top predators in their respective Gondwanan ecosystems during the Late Cretaceous, competing for similar prey types and hunting strategies despite geographic separation.
Carcharodontosaurus
Carcharodontosaurus saharicus
Both represent apex theropod predators that evolved in isolation on Gondwanan landmasses during the Cretaceous, showing how large carnivorous dinosaurs diversified differently in the southern continents compared to tyrannosaurs in the north.
Spinosaurus
Spinosaurus aegyptiacus
Both are large African-connected theropods from the Cretaceous showing how theropod apex predators diversified across Gondwanan fragments.