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Paleontology, palaeontology or palæontology (from Greek: paleo, "ancient"; ontos, "being"; and logos, "knowledge") is the study of prehistoric life forms on Earth through the examination of plant and animal fossils.^[1] This includes the study of body fossils, tracks (ichnites), burrows, cast-off parts, fossilised faeces (coprolites), palynomorphs and chemical residues. Because mankind has encountered fossils for millennia, paleontology has a long history both before and after becoming formalized as a science. This article records significant discoveries and events related to paleontology that occurred in the year 1990.

Dinosaurs

Classification events

• All Anatosaurus species except A. copei were moved to the previously existing genus Edmontosaurus by Brett-Surman

Newly named dinosaurs

Data courtesy of George Olshevsky's dinosaur genera list^[2] and Dr. Jeremy Montague's dinosaur genus database.^[3]

Name	Status	Authors		Notes	Images
Agilisaurus[4]	Valid taxon	Peng G.			Agilisaurus Anatotitan copei Bellusaurus Epachthosaurus "Kitadanisaurus" "Gryposaurus"
Anatotitan[5]	Valid taxon formerly called Anatosaurus copei	Brett-Surman vide: Chapman	Michael K. Brett-Surman
Bellusaurus[6]	Valid taxon	Dong Zhiming
Breviceratops[7]	Valid taxon	Kurzanov
Drinker[8]	Valid taxon	Robert Bakker Galton	Siegwarth Filla
Emausaurus[9]	Valid taxon	Haubold
Epachthosaurus[10]	Valid taxon	Jaime Eduardo Powell
"Futabasaurus"	Nomen nudum; later applied to a plesiosaur.	David Lambert
“Hadrosauravus"[11]	Nomen nudum	David Lambert
“Hisanohamasaurus”[11]	Nomen nudum	David Lambert
“Katsuyamasaurus"[11]	Nomen nudum	David Lambert
"Kitadanisaurus"[11]	Nomen nudum	David Lambert
"Madsenius"[11]	Nomen nudum	David Lambert
Monkonosaurus[12]	Valid taxon	Zhao X. vide: Dong Zhiming
"Ricardoestesia"	Name accidentally invalidated and replaced with misspelling.	Phillip Currie Rigby and	R.E. Sloan
“Sugiyamasaurus"[11]	Nomen nudum	David Lambert
Yimenosaurus[13]	Valid taxon	Bai vide: Bai Yang J.	Wang G.H.

References

Paleontology portal

1. ^ Newman, Garfield, et al (2001). Echoes from the past: world history to the 16th century. Toronto: McGraw-Hill Ryerson Ltd. ISBN 0-07-088739-X.  
2. ^ Olshevsky, George. "Dinogeorge's Dinosaur Genera List". http://www.polychora.com/dinolist.html. Retrieved 2008-08-07.  
3. ^ Montague, Jeremy. "Dr. Montague's Database". http://www.barry.edu/bio300/pdf/montague%20dino%20web%20data%2012-3-2005.pdf. Retrieved 2008-10-29.  
4. ^ Peng, G-Z. 1990. A new small ornithopod (Agilisaurus louderbacki gen et sp. nov.) from Zigong, Sichuan, China. Zigong Dinosaur Museum Newsletter 2: pp. 19 - 27.
5. ^ Brett-Surman vide Chapman, R.E., and M.K. Brett- Surman. 1990. Morphometric observations on hadrosaurid dinosaurs (Chapter 12). In: Dinosaurs Systematics: Perspectives and Approaches (K. Carpenter. and P.J. Currie, P.J., eds.). Cambridge University Press, New York: pp. 163- 177.
6. ^ Dong, Z. 1990. Sauropoda from the Kelameili Region of the Junggar Basin, Xinjiang Autonomous Region. (Institute of Vertebrate Paleontology and Paleoanthropology, Academia Sinica) Vertebrata PalAsiatica 28 (1 - January): pp. 43-58.
7. ^ Kurzanov, S.M. 1991. A new Late Cretaceous protoceratopsid genus from Mongolia. Paleontological Journal 1990: pp. 85-91.
8. ^ Bakker, R.T., P. Galton, J. Siegwarth, and J. Filla. 1990. A new latest Jurassic vertebrate fauna, from the highest levels of the Morrison Formation at Como Bluff, Wyoming, with comments on Morrison biochronology Part IV. The dinosaurs: a new Othnielia-like hypsilophodontoid. Hunteria, 2: pp. 8-13.
9. ^ Haubold, H. 1990. Ein neuer dinosaurier (Ornithischa, Thyreophora) aus dem unteren Jura des Hordlichen Mitteleuropa: Reviue de Paleobiologie 9 (1) : pp. 149-177.
10. ^ Powell, J.E. 1986. Revision de los titanosauridos de America del Sur Argentina. Unpublished doctoral thesis. Universidad Nacional de Tucuman, Tucuman, Argentina.
11. ^ ^{a b c d e f} Lambert, D., and the Diagram Group. 1990. The Dinosaur Data Book. Avon Books (320 pages).
12. ^ Zhao vide Dong, Z. 1990. Stegosaurs of Asia. In: Dinosaur systematics: approaches and perspectives (K. Carpenter and P.J. Currie, eds.). Cambridge Univ. Press, Cambridge, UK: pp. 255- 268.
13. ^ Bai, Z., J. Yang, and G. Wang. 1990. A new genus of prosauropod from the Yuxi (region) of Yunnnan Province [Yunnan Yuxi yuanxijiao lei yi xin shu]. Yuxi Cultural Organization [Yuxi Wen Tuan] 1 (October 1990): pp. 14-23 + plate 1.