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Concept
Timeline of ceratopsian research
Summary
This timeline of ceratopsian research is a chronological listing of events in the history of paleontology focused on the ceratopsians, a group of herbivorous marginocephalian dinosaurs that evolved parrot-like beaks, bony frills, and, later, spectacular horns. The first scientifically documented ceratopsian fossils were described by Edward Drinker Cope starting in the ; however, the remains were poorly preserved and their true nature was not recognized. Over the next several decades, Cope named several such genera and species. Cope's hated rival, Othniel Charles Marsh, also described ceratopsian remains. In 1887, Marsh mistook a Triceratops horn for one belonging to a new species of prehistoric Bison. Marsh also named the eponymous genus Ceratops in 1888. The next year, he named the most famous ceratopsian, Triceratops horridus. It was the discovery of Triceratops that illuminated the ceratopsian body plan, and he formally named the Ceratopsia in 1890.
The early 20th century was a fruitful time for ceratopsian research. In 1907, Hatcher and others published a monograph on ceratopsid anatomy that is still considered the single most significant publication on the topic to date. Many new species were being described, including Centrosaurus, Styracosaurus, and Chasmosaurus. Not long after, the Central Asiatic Expedition led by Roy Chapman Andrews of the American Museum of Natural History discovered the primitive ceratopsians Psittacosaurus and Protoceratops in Mongolia. Protoceratops gained notoriety as the supposed parent of the first fossil dinosaur eggs known to science. One of these supposed Protoceratops nests preserved the skeleton of a new kind of theropod dinosaur, Oviraptor. It was thought to have been preserved after being killed in the act of raiding the Protoceratops nest. This narrative would last until the , when the "Protoceratops" eggs were determined to belong to Oviraptor itself.
Throughout the rest of the century, paleontologists would be occupied with several controversies regarding ceratopsian paleobiology.
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