A period of great transformation, the Late Cretaceous Period is when the dinosaurs disappeared from the earth. Learn more about the Late Cretaceous dinosaurs that existed during this era, such as the Tyrannosaurus, Gallimimus, and Brachylophosaurus.
Known from only a single skull and jaw from Montana and three teeth from South Dakota, Nanotyrannus was first thought to be an Albertosaurus. But it was recently redescribed because it was different in many ways from Albertosaurus.
Discovered by the Joint Polish-Mongolian Paleontological Expedition in 1965, the sauropod Opisthocoelicaudia is known from a skeleton with nearly all the bones of the body except the neck and head. Learn more about the Opisthocoelicaudia.
The Ornithomimus has been found mainly in the Late Cretaceous Judith River and Horseshoe Canyon Formations of Alberta, but less-complete specimens have been found in the western United States as well. Learn more about the Ornithomimus.
Orodromeus is a recently discovered dinosaur and one of the most spectacular. Orodromeus (the name means 'mountain runner') was only about 6 1/2 feet long as an adult. Learn more about the Orodromeus and other Late Cretaceous dinosaurs.
The first specimen of Oviraptor was discovered by the American Museum of Natural History expedition to Asia in 1923. It was found in the Gobi Desert of Mongolia.
The largest pachycephalosaur was Pachycephalosaurus. First found in rocks of Late Cretaceous age in Montana, Pachycephalosaurus was named and described by Barnum Brown and Eric Schlaikjer. Learn more about the Pachycephalosaurus.
Pachyrhinosaurus was probably the most unusual and distinctive ceratopsid. It did not have brow or nasal horns; instead it had a thick, bumpy, spongy pad of bone along the upper surface of its flattened face. Learn more about the Pachyrhinosaurus.
Panoplosaurus is known only from two partial skeletons, one of which preserves some of the armor the way it was in life. This skeleton shows that Panoplosaurus was unusual among nodosaurids because it did not have spikes on the sides of its neck.
Parasaurolophus was an interesting-looking dinosaur. While it looked normal from the neck down, it looked almost as if it had a trombone on its head. And in a way, it did.
Not many fossils of Parksosaurus have been found. It is known only from a single skeleton and poorly preserved skull from the southern part of Alberta. Learn about Parksosaurus, Late Cretaceous dinosaurs and dinosaurs of all eras.
Known only from the Late Cretaceous of northwestern New Mexico, Pentaceratops had one large horn on its snout is a pair of large horns above its eyes is and a pair of much smaller false horns in the cheek region. Its name means "five-horned face." The horns were actually bone.
Pinacosaurus was one of the first armored dinosaurs found in Asia. An expedition from the American Museum of Natural History went to Mongolia to search for traces of early man; instead they found dinosaur eggs and skeletons.
An almost complete skull and most of the skeleton were found for Prenocephale. It was collected during the Joint Polish-Mongolian Expeditions to the Gobi Desert. The animal was named and described in 1974.
Prosaurolophus was a common duckbilled dinosaur that lived during the Late Cretaceous in North America. It was discovered, named is and described by Barnum Brown of the American Museum of Natural History in 1916.
Protoceratops andrewsi was discovered in Mongolia in 1922 by an expedition from the American Museum of Natural History led by Roy Chapman Andrews. Its genus name means "first-horned face," and its species name was in honor of the expedition's leader.
Saichania was described from a partial skeleton with the armor preserved the way it was when the animal was alive. Learn more about the Saichania and other Late Cretaceous dinosaurs.
From Salta in Argentina, Saltasaurus was described from several incomplete skeletons, none of which were found with a skull. This medium-size sauropod was dwarfed by its giant relative Antarctosaurus is also from South America.
Saurolophus ("ridged reptile") was a hadrosaurid. It had a large bony spike pointing back over the top of its head between its eyes. Learn more about the Saurolophus and other Late Cretaceous dinosaurs.
Discovered during an expedition by the American Museum of Natural History, Saurornithoides is an example of a birdlike dinosaur. It looked much like a bird. It was found close to where two other birdlike dinosaurs (Velociraptor and Oviraptor) were also discovered.
Segnosaurus galbinensis, or "slow lizard from Galbin" (a region of the Gobi Desert), was first described by Mongolian paleontologist Altangerel Perle in 1979. It was an unusual saurischian that he classified in its own family, the Segnosauridae.
Shamosaurus is one of the oldest known ankylosaurs. It lived about the same time as the nodosaur Sauropelta. Learn more about the Shamosaurus and other Late Cretaceous dinosaurs.
The paleontological expeditions into the Turpan Basin in 1964-1966 turned up several interesting and unusual dinosaurs, ilncuding the Shanshanosaurus huoyanshanensis. Learn more about the Shanshanosaurus and other Late Cretaceous dinosaurs.
Shantungosaurus may have been the largest hadrosaur. It is larger than some of the smaller sauropods. Named and described in 1973, Shantungosaurus is known from many disarticulated (not joined) bones from the Shandong Province, People's Republic of China.
In 1912 is a German paleontological expedition discovered the remains of several new Late Cretaceous dinosaurs in Egypt. Spinosaurus is a large theropod, was one of the new dinosaurs. It got its name, which means "spined reptile," because of the tall spines on its vertebrae (bones of the spine).
Struthiomimus ("ostrich mimic") is the best known of all the ornithomimids. A complete skeleton, which is now displayed at the American Museum of Natural History, was collected from the Judith River Formation of Alberta. Its name points to how similar its skeleton is to the modern Struthio (ostrich).
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