| Named By: | Price in 1964 |
| Time Period: | Miocene |
| Location: | South America, Peru |
| Size: | Up to 12 meters long |
| Diet: | Filter feeder/carnivore |
| Fossil(s): | Several individuals represented by skull and mandible (lower jaw) material and teeth |
| Classification: | | Chordata | Reptilia | Crocodylomorpha | Crocodylia | Eusuchia | Alligatoroidea | |
| Also known as: | | Carandaisuchus | Nettosuchus | |
Mourasuchus is an extinct genus of giant crocodilian from the Miocene of South America. The skull has been described as duck like, being broad, flat and very elongate, closely resembling what is seen in Stomatosuchus, an unrelated crocodilian that may also have had a large gular sac similar to those of pelicans or baleen whales. Mourasuchus had rows of small, conical teeth numbering around 40 on each side of the upper and lower jaws. Mourasuchus presumably obtained its food by filter feeding; the jaws were too gracile for the animal to have captured larger prey. It also probed the bottoms of lakes and rivers for food. Fossils have been found in the Fitzcarrald Arch of Peru, where it coexisted with many other crocodilians, including the giant gharial, Gryposuchus, and the alligatorid Purussaurus, both of which were 12 m. The great diversity of crocodylomorphs in this Miocene-age (Tortonian stage, 8 million years ago) wetland suggests that niche partitioning was efficient, which would have limited interspecific competition.