NYC Museum Unveils 'Apex,' an Almost Complete Stegosaurus

The American Museum of Natural History in New York revealed the identity of its latest resident Thursday: "Apex," one of the most complete specimens discovered of the plant-eating dinosaur Stegosaurus, known for the upright plates on its back and a spiky tail.

To excited gasps from an audience of school children, the museum pulled back a beige curtain to reveal the 11-foot-tall, 20-foot-long skeleton of the Jurassic Period dinosaur.

"People are really excited about this fossil because Stegosaurus is an iconic dinosaur," said Roger Benson, the museum's dinosaur curator.

Stegosaurus walked on four legs and lived in North America about 150 million years ago during the Jurassic Period. Its fossils were first discovered in the 1870s.

"Although it was a herbivore, Stegosaurus wasn't like a cow or a sheep," Benson said. "It's a herbivore that could look after itself. It has these wicked spikes on its tail. It has plates along its back."

Those would have been useful as protection against meat-eating dinosaurs such as Allosaurus.

This Stegosaurus fossil was found in Colorado and fetched a record $44.6 million at a Sotheby's auction in July. The buyer has loaned it to the New York museum, one of the leading natural history museums in the United States.

"Everyone has their own favorite dinosaur, but Stegosaurus is up there in the top five. So it's hard not to get excited about a really complete, large individual of this animal," Benson said.