page_title: Timeline of hadrosaur research
section_title: 1960s
hierarchical_section_title: Timeline of hadrosaur research / 20th century / 1960s
caption_attribution_description: Parasaurolophus cyrtocristatus skeleton, Field Museum.
context_page_description: This timeline of hadrosaur research is a chronological listing of events in the history of paleontology focused on the hadrosauroids, a group of herbivorous ornithopod dinosaurs popularly known as the duck-billed dinosaurs. Scientific research on hadrosaurs began in the 1850s, when Joseph Leidy described the genera Thespesius and Trachodon based on scrappy fossils discovered in the western United States. Just two years later he published a description of the much better-preserved remains of an animal from New Jersey that he named Hadrosaurus.
  The early 20th century saw such a boom in hadrosaur discoveries and research that paleontologists' knowledge of these dinosaurs "increased by virtually an order of magnitude" according to a 2004 review by Horner, Weishampel, and Forster. This period is known as the great North American Dinosaur rush because of the research and excavation efforts of paleontologists like Brown, Gilmore, Lambe, Parks, and the Sternbergs. Major discoveries included the variety of cranial ornamentation among hadrosaurs as scientist came to characterize uncrested, solid crested, and hollow crested species.
context_section_description: 1960
  Langston described the new genus and species Lophorhothon atopus.
  1961
  Ostrom described the new species Parasaurolophus cyrtocristatus.
  1964
  Ostrom supported Krausel's 1922 claim that fossil plant material found associated with an Edmontosaurus annectens mummy was actually its gut contents.
  1967
  Russel and Chamney studied distribution of hadrosaur in Maastrichtian North America. The concluded that Edmontosaurus regalis lived near the coasts while Hypacrosaurus altispinus and Saurolophus osborni lived slightly more inland.
  1968
  Rozhdeventsky described the new genus and species Aralosaurus tubiferous. He also described the new species Procheneosaurus convincens.
caption: Skeletal reconstruction of Parasaurolophus cyrtocristatus
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