USA TODAY International Edition
Fossil of giant dinosaur found in Argentina
Scientists in Argentina say they discovered a fossil linked to what they believe is the world’s first giant dinosaur.
The new species, dubbed Ingentia prima, is believed to have appeared on Earth 30 million years earlier than the first giant dinosaurs called sauropods, according to researchers at Argentina’s Universidad Nacional de San Juan.
The late Triassic period roughly 210 million years ago was a critical time for the evolution of dinosaurs, researchers said. Sauropods, which include dinosaurs such as the brachiosaurus, underwent significant changes in their anatomy, gaining longer necks, four thick legs and smaller heads, with some weighing as much as 70 tons.
“Before this discovery, gigantism was considered to have started during the Jurassic period, about 180 million years ago approximately,” said researcher Cecilia Apaldetti of Universidad Nacional de San Juan. “But Ingentia prima lived during the last part of the Triassic period, between 210 and 205 million years ago.”
Scientists believe the Ingentia prima was an herbivore weighing about 10 tons. The term Ingentia is Latin for “huge,” and prima is “first.”
Their findings were published in the journal Nature Ecology and Evolution.