The museum's Triceratops may have been the first horned dinosaur to be put on display when it was opened to view in 1905, but by 1998 the bones were deteriorating, Chapman explained.
42.
Evidence that visual display was important, either in courtship or in other social behavior, can be seen in the fact that horned dinosaurs differ markedly in their adornments, making each species highly distinctive.
43.
"" Liaoceratops " gives us a great window on the early evolution of horned dinosaurs and tells us that " Triceratops " and its relatives evolved from very small Asian ceratopsians.
44.
Robert Bakker reports that it made up one-seventh of the large dinosaur sample, with most of the rest ( five-sixths ) made up of the horned dinosaur " Triceratops ".
45.
Particularly impressive are the skull of Triceratops, a three-horned dinosaur, and the skeleton of Krontosaurus, a 42-foot-long marine reptile known as " the ruler of the sea ."
46.
""'Albertaceratops " "'( meaning " Alberta horned face " ) was a genus of horned dinosaur from the middle Campanian-age Upper Cretaceous Oldman Formation of Alberta, Canada.
47.
These new finds have been vital in illustrating the origins of horned dinosaurs in general, suggesting an Asian origin in the Jurassic, and the appearance of truly horned ceratopsians by the beginning of the late Cretaceous in North America.
48.
Fossils discovered in western New Mexico are believed to be from the oldest horned dinosaur ever found and could help fill in a 15 million-to 20 million-year gap in the lives and times of dinosaurs in North America.
49.
Doug Wolfe, an adjunct curator at Mesa Southwest Museum in Arizona, and his son Christopher, 7, found a brow horn from a ceratopsian, or horned dinosaur, last year near Quemado in west-central New Mexico.
50.
Lockley considers them to be of " extraordinary scientific importance, " with the first tracks ever found of horned dinosaurs known as ceratopsians and the only track of a champsosaur, a crocodile-like dinosaur, known to exist in the United States.
