Biology:Timeline of oviraptorosaur research
This timeline of oviraptorosaur research is a chronological listing of events in the history of paleontology focused on the oviraptorosaurs, a group of beaked, bird-like theropod dinosaurs. The early history of oviraptorosaur paleontology is characterized by taxonomic confusion due to the unusual characteristics of these dinosaurs. When initially described in 1924 Oviraptor itself was thought to be a member of the Ornithomimidae, popularly known as the "ostrich" dinosaurs, because both taxa share toothless beaks.[1] Early caenagnathid oviraptorosaur discoveries like Caenagnathus itself were also incorrectly classified at the time, having been misidentified as birds.[1]
20th century
1920s
1923
- A specimen of the species that would come to be named Oviraptor philoceratops was found preserved on top of a nest of eggs.[2]
1924
- Osborn described the new genus and species Oviraptor philoceratops.[3] He classified it as an ornithomimid because it didn't have any teeth in its jaws[1] and interpreted the genus as being adapted to a diet of eggs.[2] Since a specimen was found preserved on top of a nest of eggs presumed to belong to Protoceratops, Osborn thought that it was smothered by a sandstorm while in the act of raiding the nest.[2]
![](/wiki/images/thumb/c/c8/Chirostenotes_limbs.jpg/190px-Chirostenotes_limbs.jpg)
- Gilmore described the new genus and species Chirostenotes pergracilis.[3]
1930s
1932
- C. M. Sternberg described the new genus and species Macrophalangia canadensis.[3]
1933
- Parks described the new species Ornithomimus elegans and referred it to Chirostenotes.[3]
1940s
1940
- R. M. Sternberg described the new genus and species Caenagnathus collinsi and named the Caenagnathidae and Caenagnathoidea.[3] He thought they were birds.[1]
1950s
1956
- Romer followed Osborn's original classification of Oviraptor as an ornithomimid. He also observed that caenagnathids had reptilian characteristics and may have been coelurosaurs.[1]
1960s
1960
- Wetmore questioned the hypothesis that caenagnathids were birds because their remains exhibit some reptilian traits.[1]
1966
- Romer continued to follow Osborn's original classification of Oviraptor as an ornithomimid.[1]
1970s
![](/wiki/images/thumb/8/87/Microvenator_celer.jpg/190px-Microvenator_celer.jpg)
1970
- Ostrom described the new genus and species Microvenator celer.[4]
- Steel followed Osborn's original classification of Oviraptor as an ornithomimid.[1] He also questioned the avian status of caenagnathids and proposed that they might actually be coelurosaurs instead.[1]
1971
1972
- Russell argued against the classification of Oviraptor as an ornithomimid.[1]
1976
- Osmolska recognized that caenagnathids were theropods and classified Oviraptor as a member of the family.[1]
- Barsbold classified Oviraptor as a member of the new taxa Oviraptorinae and Oviraptoridae.[1]
- Barsbold named the Oviraptorosauria.[3]
1980s
![](/wiki/images/thumb/0/0f/Avimimus_mmartyniuk_wiki.png/190px-Avimimus_mmartyniuk_wiki.png)
1981
- Kurzanov described the new genus and species Avimimus portentosus.[3]
- Barsbold described the new genus and species Ingenia yanshini.[4] He also named the subfamily Ingeniinae[4] and classified the family Caenagnathidae in the Oviraptorosauria.[1]
- Osmolska described the new genus and species Elmisaurus rarus.[4]
1983
- Barsbold proposed that oviraptorosaurs used their powerful beaks to feed on shelled mollusks.[2]
1986
- Barsbold described the new species Oviraptor mongoliensis.[3]
- Barsbold described the new genus and species Conchoraptor gracilis.[4]
- Gauthier considered oviraptorosaurs, deinonychosaurs, and avialans to be maniraptorans.[1]
1988
- Currie and Russell observed that caenagnathids had arctometatarsalian feet.[2]
1990s
1991
- Jerzykiewicz and Russell observed that oviraptorosaurs seem to have been most common during the Djadokhta stage.[2]
- Sabath described an oviraptorosaur nest mound.[2]
1992
- Smith interpreted the biomechanics of oviraptorosaur jaws to imply that these dinosaurs were actually herbivorous.[2]
1993
- Jerzykiewicz and others observed that oviraptorosaurs seem to have been most common in central Asia.[2]
- Currie, Godfrey, and Nessov described the new genus and species Caenagnathasia martinsoni.[3]
- Currie and others built a case for interpreting oviraptorosaurs as egg-eaters who supplemented their diet with small prey. They noted supporting traits like the animals' ability to give a "powerful nipping bite" with the front of its beak. Oviraptorosaurs also had tooth-like projections from the roof of the mouth, which resemble similar adaptations in modern egg-eating mammals. The orientation of the throat on the underside of the jaw is also consistent with this reconstruction of oviraptorosaur paleoecology.[2]
- Russell and Dong argued that the Maniraptora (which includes Oviraptorosauria) was a polyphyletic assemblage of unrelated groups. Instead they classified the traditional oviraptorosaurs with the ornithomimids, therizinosauroids, and troodontids in a new, greatly expanded Oviraptorosauria.[5]
1994
- Norell and others reported the discovery of a tiny theropod skeleton in an oviraptorid nest. They suggested this find was evidence that oviraptorosaur hunted tiny game. They also noted that the supposed Protoceratops eggs of the Central Asiatic Expeditions actually preserved the embryonic remains of oviraptorosaurs.[2]
1996
- Currie reported the presence of nests of large eggs more than 40 centimetres (16 in) long in China. Oviraptorosaurs would come to be considered possible candidates for the egg layers.[2]
- Dong and Currie reported the discovery of an oviraptorid from the Djadokhta Formation of northern China preserved on top of a nest of eggs. This overturned more than 60 years of interpreting the Oviraptor of the Central Asiatic Expeditions as a rapacious egg-thief in favor of it likely being a faithful mother at her nest. The researchers reconstructed the way mother oviraptorosaurs built their nests. The standing mother would lay a pair of eggs and bury them by hand. Then she would turn and repeat the process until she had made a ring of egg-pairs completely around herself. Since by then the area where she was standing would be higher than the eggs, she would repeat the process with another ring of egg-pairs as a second layer. This process would gradually build an egg mound containing as many as 30 eggs in up to three layers.[2]
1997
- Sues published a critical review of earlier interpretations of the oviraptorosaurs' evolutionary relationships and formulated the clade's first synapomorphy-based diagnosis. He also performed a cladistic analysis and found oviraptorosaurs to be the sister group of the therizinosaurs.[6]
- Sereno regarded oviraptorosaurs as maniraptorans and found them to be the sister group of Paraves (which includes deinonychosaurs and birds) in a cladistic analysis.[6]
- Padian and others published a cladistic definition for Oviraptorsauris for the first time; all taxa closer to Oviraptor than to birds.[6]
- Barsbold described the new genus Rinchenia for the species Oviraptor mongoliensis.[3] Barsbold credited Currie and Padian for defining Oviraptorosauria as the Oviraptoridae and all taxa closer to Oviraptor.[6]
1998
- Sereno regarded oviraptorosaurs as maniraptorans and found them to be the sister group of Paraves (which includes deinonychosaurs and birds) in a cladistic analysis.[6] He defined oviraptorosaurs as all maniraptorans closer to Oviraptor than to Neornithes.[6]
- Currie, Norell, and Ji described the new genus and species Caudipteryx zoui.[3]
- Ji and others reported the presence of gastroliths in Caudipteryx. These are evidence for an herbivorous diet.[2]
- Makovicky and Sues considered oviraptorosaurs to be the sister group of the therizinosaurs.[6]
1999
- Sereno found Caudipteryx to be a basal oviraptorosaur. He also erected the clade Caenagnathoidea for the caenagnathids and oviraptorids.[6]
- Elzanowski performed a cladistic analysis and found a group consisting of oviraptorosaurs, ornithomimosaurs and therizinosaurs were more closely related to birds than deinonychosaurs. No other cladistic study in the history of dinosaur research had come up with this result.[6]
- Padian and others changed the definition of Oviraptorosauria from a stem-based clade to a node-based one. They defined the oviraptorosaurs as "Oviraptor and Chirostenotes (=Caenagnathus) and all the descendants of their most recent common ancestor."[6]
- Clark and others observed that oviraptorosaurs are among the most common dinosaurs found at Ukhaa Tolgod in Mongolia.[2] They reported further specimens preserved on nests in brooding position. They suggested contrary to Dong and Currie's 1996 reconstruction of oviraptorosaur nest-building behavior that the animals may have constructed their nests by maneuvering the eggs into position by hand. However, this explanation is less parsimonious and has less evidentiary support, so it never gained favor among paleontologists.[2]
21st century
![](/wiki/images/thumb/2/29/Nomingia_gobiensis.png/250px-Nomingia_gobiensis.png)
2000s
2000
- Currie, Norell, and Ji described the new species Caudipteryx dongi.[3]
- Barsbold and others described the new genus and species Nomingia gobiensis.[3]
- Zhou and Wang named the Caudipterygidae.[3]
2001
- Clark, Norell, and Barsbold described the new genus and species Citipati osmolskae.[4]
- Clark, Norell, and Barsbold described the new genus and species Khaan mckennai.[4]
- David J. Varrichio reported the first occurrences of oviraptorosaurs from Montana.[7] The first find was an articular region from the lower jaw of Caenagnathus sternbergi of Campanian age from the Two Medicine Formation.[7] This species had previously only been known from the Canadian province of Alberta.[7] Another new Montanan oviraptorosaur specimen, a foot found in the Hell Creek Formation, was assigned to Leptorhynchus elegans (as Elmisaurus elegans).[7]
- Kevin Padian, Ji Qiang and Ji Shu-an published a review of known feathered dinosaurs and their implications for the origin of flight.[8] The authors observe that many aspects of the distribution of feather homologues meet the expectations of earlier phylogenetic hypotheses, including a gradual transition from primitive filaments in Sinosauropteryx to the shared filaments and "rudimentary" true feathers in Caudipteryx and Protarchaeopteryx, to flight feathers in Archaeopteryx.[9] The team speculates that the plumulaceous feathers in Cauditeryx and Protarchaeopteryx may have originated as tufts of Sinosauropteryx-style filaments, the shafts of which possibly formed by the consolidation of individual filaments.[10] The parallel nature of the barbs in Caudipteryx and Protarcheopteryx suggest the existence of barbules.[11] This suggests that barbules, which are necessary for flight-worthy wings, evolved prior to flight.[11]
Cladogram of feathered dinosaurs from Padian et al. 2001
Feathered Dinosaurs
Coelurosaurs
Maniraptora
Aves
Neornithes (P)
Enantiornithes (P)
Confuciusornis (P)
Archaeopteryx (P)
Dromaeosaurs (F)
Troodontids
Caudipteryx (F)
Therizinosaurs (F)
Ornithomimids
Sinosauropteryx (F)
Taxa marked with a P were known to bear plumulaceous or pennaceous feathers at the time of the study. Taxa marked with F were known to bear simple filamentous integumentary structures.
![](/wiki/images/thumb/4/43/Incisivosaurus_gauthieri.jpg/250px-Incisivosaurus_gauthieri.jpg)
2000
- 2002? Teresa Maryańska and others confirmed Sereno's finding that Caudipteryx was an oviraptorosaur. They also found Avimimus to be an oviraptorosaur as well.[6]
2002
- Xu and others described the new genus and species Incisivosaurus gauthieri.[3] Their research supported recent findings that Caudipteryx and Avimimus were oviraptorosaurs.[6]
- Maryanska and others performed a cladistic analysis that found oviraptorosaurs to be avialans.[6]
- Zelenitsky and others studied the shape and shell histology of the large fossil eggs reported from China by Currie in 1996 and concluded that they may have been laid by oviraptorosaurs. Given their large size, this implied that giant oviraptorosaurs remained to be discovered.[2]
2003
- Lü described the new genus and species Heyuannia huangi.[4]
![](/wiki/images/thumb/f/fd/Gigantoraptor.jpg/190px-Gigantoraptor.jpg)
2004
- Lü and others described the new genus and species Nemegtia barsboldi.[12]
2005
- Zanno and Sampson described the new genus and species Hagryphus giganteus.[13]
- Lü and others described the new genus Nemegtomaia.[14]
- Lü and Zhang described the new genus and species Shixinggia oblita.[15]
2007
- Xu and others described the new genus and species Gigantoraptor erlianensis.[16]
2008
- T. He, X.-L. Wang, and Z.-H. Zhou described the new genus and species Similicaudipteryx yixianensis.[17]
2009
- Lü and others described the new genus and species Luoyanggia liudianensis.[18]
2010s
2010
- Xu and Han described the new genus and species Banji long.[19]
- Longrich, Currie and Dong described the new genus and species Machairasaurus leptonychus.[20]
2011
- Sullivan, Jasinski and Van Tomme described the new genus and species Epichirostenotes curriei.[21]
- Robert M. Sullivan, Steven E. Jasinski, and Mark P.A. Van Tomme described the new genus and species Ojoraptorsaurus boerei.[21]
2012
- Ji and others described the new genus and species Ningyuansaurus wangi.[22]
2013
- Easter described the new genus Ajancingenia, as a replacement name for "Ingenia".[23]
- Wang and others described the new genus and species Ganzhousaurus nankangensis.[24]
- Wei and others described the new genus and species Jiangxisaurus ganzhouensis.[25]
- Longrich and others described the new genus and species Leptorhynchos gaddisi.[26]
- Lü and others described the new genus and species Nankangia jiangxiensis.[27]
- Xu and others described the new genus and species Wulatelong gobiensis.[28]
- Lü and others described the new genus and species Yulong mini.[29]
2014
- Lamanna and others described the new genus and species Anzu wyliei.[30]
2015
- Lü and others described the new genus and species Huanansaurus ganzhouensis.[31]
2016
- Funston and Currie described the new genus and species Apatoraptor pennatus.[32]
- Lü and others described the new genus and species Tongtianlong limosus.[33]
2017
- Lü and others described the new genus and species Beibeilong sinensis.
- Lü and others described the new genus and species Corythoraptor jacobsi.
2018
- Yu and others described the new genus and species Anomalipes zhaoi.[34]
- Funston and others described the new species Avimimus nemegtensis[35]
2019
- Lee and others described the new genus and species Gobiraptor minutus.[36]
- Qiu and others described the new genus and species Xingtianosaurus ganqi.[37]
See also
- History of paleontology
- Timeline of ornithomimosaur research
Footnotes
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 Osmolska, Currie, and Barsbold (2004); "Systematics and Evolution", page 178.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 Osmolska, Currie, and Barsbold (2004); "Paleoecology", page 183.
- ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 3.11 3.12 3.13 3.14 3.15 Osmolska, Currie, and Barsbold (2004); "Table 8.1: Oviraptorosauria", page 166.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 Osmolska, Currie, and Barsbold (2004); "Table 8.1: Oviraptorosauria", page 167.
- ↑ Osmolska, Currie, and Barsbold (2004); "Systematics and Evolution", pages 178-179.
- ↑ 6.00 6.01 6.02 6.03 6.04 6.05 6.06 6.07 6.08 6.09 6.10 6.11 6.12 Osmolska, Currie, and Barsbold (2004); "Systematics and Evolution", page 179.
- ↑ 7.0 7.1 7.2 7.3 Varricchio (2001); "Abstract," page 42.
- ↑ Padian, Ji, and Ji (2001); "Abstract," page 117.
- ↑ Padian, Ji, and Ji (2001); "Conclusions," pages 131-132.
- ↑ Padian, Ji, and Ji (2001); "Possible Evolutionary Sequence from Protofeathers to True Feathers," page 126.
- ↑ 11.0 11.1 Padian, Ji, and Ji (2001); "Possible Evolutionary Sequence from Protofeathers to True Feathers," page 127.
- ↑ Lü et al. (2004); "Abstract," page 95.
- ↑ Zanno and Sampson (2005); "Abstract," page 897.
- ↑ Lü et al. (2005); "Abstract," page 51.
- ↑ Lü and Zhang (2005); "Abstract," page 412.
- ↑ Xu et al. (2007); "Abstract," page 844.
- ↑ He, Wang, and Zhou (2008); "Abstract," page 178.
- ↑ Lü et al. (2009); "Abstract," page 43.
- ↑ Xu and Han (2010); "Abstract," page 11.
- ↑ Longrich, Currie, and Dong (2010); "Abstract," page 23.
- ↑ 21.0 21.1 Sullivan, Jasinski and Van Tomme (2011); "Abstract," page 418.
- ↑ Ji et al. (2012); "Abstract," page 2102.
- ↑ Easter (2013); "Abstract," page 184.
- ↑ Wang et al. (2013); "Abstract," page 242.
- ↑ Wei et al. (2013); "Abstract," page 11.
- ↑ Longrich et al. (2013); "Abstract," page 899.
- ↑ Lü et al. (2013b); "Abstract," page 1.
- ↑ Xu et al. (2013); "Abstract," page 85.
- ↑ Lü et al. (2013a); "Abstract," page 165.
- ↑ Lamanna et al. (2014); "Abstract," page 1.
- ↑ Lü et al. (2015); in passim.
- ↑ Funston and Currie (2016); in passim.
- ↑ Lü et al. (2016); in passim.
- ↑ Yilun Yu; Kebai Wang; Shuqing Chen; Corwin Sullivan; Shuo Wang; Peiye Wang; Xing Xu (2018). "A new caenagnathid dinosaur from the Upper Cretaceous Wangshi Group of Shandong, China, with comments on size variation among oviraptorosaurs". Scientific Reports 8 (1): Article number 5030. doi:10.1038/s41598-018-23252-2. PMID 29567954. Bibcode: 2018NatSR...8.5030Y.
- ↑ G.F. Funston; S.E. Mendonca; P.J. Currie; R. Barsbold (2018). "Oviraptorosaur anatomy, diversity and ecology in the Nemegt Basin". Palaeogeography, Palaeoclimatology, Palaeoecology 494: 101–120. doi:10.1016/j.palaeo.2017.10.023. Bibcode: 2018PPP...494..101F.
- ↑ Sungjin Lee; Yuong-Nam Lee; Anusuya Chinsamy; Junchang Lü; Rinchen Barsbold; Khishigjav Tsogtbaatar (2019). "A new baby oviraptorid dinosaur (Dinosauria: Theropoda) from the Upper Cretaceous Nemegt Formation of Mongolia". PLOS ONE 14 (2): e0210867. doi:10.1371/journal.pone.0210867. PMID 30726228. Bibcode: 2019PLoSO..1410867L.
- ↑ Rui Qiu; Xiaolin Wang; Qiang Wang; Ning Li; Jialiang Zhang; Yiyun Ma (2019). "A new caudipterid from the Lower Cretaceous of China with information on the evolution of the manus of Oviraptorosauria". Scientific Reports 9 (1): Article number 6431. doi:10.1038/s41598-019-42547-6. PMID 31024012. Bibcode: 2019NatSR...9.6431Q.
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- Xu Xing, Tan Qing-Wei, Wang Shuo, Corwin Sullivan, David W. E. Hone, Han Feng-Lu, Ma Qing-Yu, Tan Lin and Xiao Dong (2013). "A new oviraptorid from the Upper Cretaceous of Nei Mongol, China, and its stratigraphic implications". Vertebrata PalAsiatica 51 (2): 85–101. http://www.ivpp.cas.cn/cbw/gjzdwxb/xbwzxz/201305/P020130507385115746165.pdf.
- Xu, X.; Tan, Q.; Wang, J.; Zhao, X.; Tan, L. (2007). "A gigantic bird-like dinosaur from the Late Cretaceous of China". Nature 447 (7146): 844–847. doi:10.1038/nature05849. PMID 17565365. Bibcode: 2007Natur.447..844X. http://doc.rero.ch/record/15575/files/PAL_E3002.pdf.
- Zanno, Lindsay E.; Sampson, Scott D. (2005). "A new oviraptorosaur (Theropoda; Maniraptora) from the Late Cretaceous (Campanian) of Utah". Journal of Vertebrate Paleontology 25 (4): 897–904. doi:10.1671/0272-4634(2005)025[0897:ANOTMF2.0.CO;2].
External links
![]() | Original source: https://en.wikipedia.org/wiki/Timeline of oviraptorosaur research.
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