Gigantic Crocodile with T. Rex Teeth Was a Top Land Predator of the Jurassic in Madagascar

 

Credit: Fabio Manucci

Deep and massive jaw bones armed with enormous serrated teeth that are similar in size and shape to those of a T-rex strongly suggest that these animals fed also on hard tissue such as bone and tendon. The full name of the predatory crocodyliform (nicknamed ‘Razana’) is Razanandrongobe sakalavae, which means “giant lizard ancestor from Sakalava region”. 

 

Credit: Fabio Manucci

A combination of anatomical features clearly identify this taxon as a Jurassic notosuchian, close to the South American baurusuchids and sebecids, that were highly specialized predators of terrestrial habits, different from present-day crocodilians in having a deep skull and powerful erect limbs. “Like these and other gigantic crocs from the Cretaceous, ‘Razana’ could outcompete even theropod dinosaurs, at the top of the food chain”, says Cristiano Dal Sasso, of the Natural History Museum of Milan.

 

Credit: Fabio Manucci

Razanandrongobe sakalavae is by far the oldest – and possibly the largest – representative of the Notosuchia, documenting one of the earliest events of exacerbated increase in body size along the evolutionary history of the group.

Credit: Fabio Manucci

“Its geographic position during the period when Madagascar was separating from other landmasses is strongly suggestive of an endemic lineage. At the same time, it represents a further signal that the Notosuchia originated in southern Gondwana”, remarks co-author Simone Maganuco.

 

Contacts and sources:

PeerJ

Dr. Cristiano Dal Sasso
Sezione di Paleontologia dei Vertebrati
Museo di Storia Naturale di Milano

Citation: Dal Sasso et al. (2017), Razanandrongobe sakalavae, a gigantic mesoeucrocodylian from the Middle Jurassic of Madagascar, is the oldest known notosuchian. PeerJ 5:e3481; DOI 10.7717/peerj.3481  https://peerj.com/articles/3481