page_title: Timeline of hadrosaur research
section_title: 1980s
hierarchical_section_title: Timeline of hadrosaur research / 20th century / 1980s
caption_attribution_description: English: Maiasaura panorama drawing by me user debivort october 2007.
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: 1980
  Hotton argued that some hadrosaurs may have migrated seasonally in a north-south direction.
  1981
  Teresa Maryańska and Osmolska described the new genus and species Barsboldia sicinskii.
  Morris described the new species Lambeosaurus laticaudus.
  1982
  Suslov and Shilin described the new genus and species Arstanosaurus akkurganensis.
  Carpenter disputed the idea that hadrosaurs only nested in upland environments, instead arguing that fossil hadrosaur eggs and hatchlings were only absent from coastal deposits because the chemistry of the ancient soils were simply too acidic to preserve them.
  Thulborn argued that hadrosaurs may have been able to run at speeds of up to 14–20 km/hr for sustained periods.
  1983
  Horner observed that Maiasaura peeblesorum is only known to have lived in the upper regions of contemporary coastal plains.
  Weishampel described hadrosaur chewing and cranial kinetics.
  Weishampel and Weishampel reported the presence of hadrosaur remains on the Antarctic Peninsula.
  1984
  Wu described the new genus and species Jaxartosaurus fuyuensis.
  Milner and Norman argued that hadrosaurs evolved in Asia.
  Horner observed that fossil eggs and hadrosaur hatchlings were common in sediments deposited in the upper regions of what were once coastal plains.
  Weishampel described hadrosaur chewing and cranial kinetics.
  Norman described hadrosaur chewing and cranial kinetics.
  Weishampel argued that hadrosaurs fed mainly on vegetation of 2 m in height or less but had a maximum browsing height of 4 m.
  Bonaparte and others described the new species Kritosaurus australis.
  1985
  Norman and Weishampel described hadrosaur chewing and cranial kinetics.
  1987
  Horner observed that fossil eggs and hadrosaur hatchlings were common in sediments deposited in the upper regions of what were once coastal plains.
  Farlow argued that their highly developed chewing abilities and large gut volumes meant hadrosaurs werehighly adapted to feeding on nutrient poor, fibrous vegetation.
  1988
  Horner described the new species Brachylophosaurus goodwini.
caption: Hotton argued that some hadrosaurs may have migrated
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