Duck-billed dinosaur may be one of many at Missouri site

Finding the fossils of a large duck-billed dinosaur in southern Missouri is exciting enough, but a paleontologist who helped lead the dig believes there are many more in the same area.

The latest fossils are a specimen of Parrosaurus missouriensis, first discovered at the same site in Bollinger County nearly 80 years ago but not confirmed as a new species until the latest dig. Experts believe the plant-eating dinosaurs grew to around 35 feet (11 meters) in length. Remains of four of the species have been found in the same area about 110 miles (180 kilometers) south of St. Louis.

Last month, a crane hoisted a 2,500-pound (1,130-kilogram) chunk of remains from the latest find from the glen of a wooded area. The fossils will go to Chicago's Field Museum for further research.

University of Minnesota Paleontologist Peter Makovicky, who helped lead the dig, said Monday that he believes the remains of many other dinosaurs will be found at the site.

"We actually have something that’s probably a mass death locality, where we have a herd of dinosaurs dying and being sort of buried together, and individuals of different ages,” Makovicky said.

“We can start looking at how these dinosaurs grew, start to understand a little bit about their biology and their possible herd structure. And that’s unique for a site east of the Great Plains. Most of what we know about the North American dinosaur comes from out west,” Makovicky said.

The first dinosaur fossils at the Missouri site were found in the early 1940s, uncovered by a family digging a well. Experts weren't sure what sort of dinosaur it was and the bones were shelved for a long time.

A Missouri paleontologist purchased the property in the 1980s. A second set of dinosaur bones were found then.

Meanwhile, Guy Darrough, a fossil...