Feb 13, 2020 16:42 Asia/Tehran [Updated: Aug 11, 2020 22:13 Asia/Tehran]

Scientists have unearthed one of the largest turtles that ever lived, which prowled the lakes and rivers of northern South America and was built for battle.

Iran PressAmerica: One of the largest turtles that ever lived prowled the lakes and rivers of northern South America from about 13 million years ago to 7 million years ago, and this car-sized freshwater beast was built for battle.

Scientists said on Wednesday (February 12) that they have unearthed new fossils of the turtle, called Stupendemys geographicus, in Colombia's Tatacoa Desert and Venezuela's Urumaco region that for the first time provide a comprehensive understanding of the big reptile, which got up to 13 feet (4 meters) long and 1.25 tonnes in weight, Reuters reported.

Stupendemys males, unlike the females, boasted sturdy front-facing horns on both sides of the carapace -or shell- very close to the neck. Deep scars detected in the fossils indicated that these horns may have been used like a lance for fighting with other Stupendemys males over mates or territory.

Fighting occurs among certain turtles alive today, particularly between male tortoises, according to paleontologist Edwin Cadena of the Universidad del Rosario in Bogota, who led the research published in the journal Science Advances.

Stupendemys is the second-largest known turtle, behind seagoing Archelon, which lived roughly 70 million years ago at the end of the age of dinosaurs and reached about 15 feet (4.6 meters) in length.

The first Stupendemys fossils were found in the 1970s but many mysteries remained about the animal. The new fossils included the largest-known turtle shell - 9.4 feet (2.86 meters) long, even larger than Archelon's shell - and the first lower jaw remains, which gave clues about its diet.

Stupendemys -meaning 'stupendous turtle'- inhabited a colossal wetlands system spanning Colombia, Venezuela, Brazil and Peru before the Amazon and Orinoco rivers were formed.

Its large size may have been crucial in defending against formidable predators. It shared the environment with giant crocodilians including the 36-foot-long (11-metre-long) caiman Purussaurus and the 33-foot-long (10-metre-long) gavial relative Gryposuchus. One of the Stupendemys fossils was found with a two-inch-long (5 cm) croc tooth embedded in it.

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