Named By: Novas - 1998.
Classification: Chordata, Reptilia, Dinosauria, Saurischia, Theropoda, Allosauroidea, Neovenatoridae, Megaraptora.
Species: M. namunhuaiquii (type).
Size: Uncertain due to lack of remains, but estimated to be as much as 8 meters long.
Known locations: Argentina - Portezuelo Formation.
Time period:Turonian of the Cretaceous.
Fossil representation: Two specimens of partial post cranial remains.
made headlines at the time of its discovery because of the large thirty
centimetre long claw that at the time was thought to be the sickle
shaped claw that belonged on the second toe of a dromaeosaurid
but much bigger. However the discovery of a
complete forelimb revealed this reconstruction to be a gross error in
that the large claws actually belonged on the hands and not the feet.
Afterwards Megaraptor was thought to have been a spinosaurid as the large claws were similar to members of this group such as Baryonx. However it was new dinosaur discoveries in other parts of the world like Australia that led to the realisation that Megaraptor actually belonged to a specialised group of allosaurids, today known as the Megaraptora, a group named after the Megaraptor genus. The large claws on the hands of these generally lightly built theropods may have been additional weapons for attacking prey or even feeding aids to more easily tear up carcasses.
Dinosaurs similar to Megaraptor include Aerosteon, Australovenator, Fukuiraptor, Siats and Orkoraptor.
- Megaraptor namunhuaiquii, gen. et sp. nov., a large-clawed, Late Cretaceous theropod from Patagonia. - Journal of Vertebrate Paleontology 18(1):4-9. - F. E. Novas - 1998.
- Phylogenetic status of Megaraptor namunhuaiquii Novas based on a new specimen from Neuquén, Patagonia, Argentina. - Ameghiniana 41: 565–575. - J. O. Calvo, J. D. Porfin, C. Veralli, F. E. Novas & F. Poblete - 2007.
- Juvenile specimen of Megaraptor (Dinosauria, Theropoda) sheds light about tyrannosauroid radiation. - Cretaceous Research. 51: 35–55. - Juan D. Porfiri, Fernando E. Novas, Jorge O. Calvo, Federico L. Agnolín, Martín D. Ezcurra & Ignacio A. Cerda - 2014.