A New Troodontid (Theropoda: Troodontidae) from the Lower Cretaceous Yixian Formation of Western Liaoning, China
Abstract
Abstract A specimen collected from the Lower Cretaceous Yixian Formation of western Liaoning, China, represents a new genus and species of troodontid theropod. The new taxon is named and described on the basis of the holotype and the only known specimen, which comprises an articulated skeleton with the presacral vertebral, shoulder girdle and forelimbs missing as preserved. Diagnostic features of the new species include nasals that are sinusoid in lateral view, absence of a passage connecting the antorbital and maxillary fenestrae, relatively large teeth, plate‐like chevrons forming a band along most of the length of the tail, and a long neck between the femoral head and shaft. The temporal constraints of the three paravian groups (Troodontidae, Dromaeosauridae and Aves) combined with the character distributions among the earliest known troodontids indicate a rapid evolution at the base of the Troodontidae.
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Previously, four troodontid species have been reported from the Lower Cretaceous Jehol Group: Mei long, Sinovenator changii, Sinusonasus magnodens and Jinfengopteryx elegans.
“Previously, four troodontid species have been reported from the Lower Cretaceous Jehol Group: Mei long10, Sinovenator changii9, Sinusonasus magnodens11 and Jinfengopteryx elegans13.”
From Mosaic evolution in an asymmetrically feathered troodontid dinosaur with transitional features (2017) · cites this paper as [11]
Cites
The theropod ancestry of birds: new evidence from the late cretaceous of madagascar
Forster, C. A., Sampson, S. D., Chiappe, L. M., & Krause, D. W. (1998) · Science · doi:10.1126/science.279.5358.1915 · Cited by 314 · cited 1× · see citing works
“Troodontids represent one of the most bird-like theropod groups (Currie, 1985,1987; Forster et al., 1998; Currie and Dong, 2001; Xu et al., 2002c) and, together with dromaeosaurids, have been regarded by many authors to be the closest relatives of birds (Gauthier, 1986; Makovicky and Sues, 1998; Sereno, 1999; Xu et al.”
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Rauhut, O. W. M., Foth, C., & Tischlinger, H. (2018) · PeerJ · doi:10.7717/peerj.4191 · Cited by 100 · see citing works
Gao, C., Morschhauser, E. M., Varricchio, D. J., Liu, J., & Zhao, B. (2012) · PLoS ONE · doi:10.1371/journal.pone.0045203 · Cited by 96 · see citing works
Hartman, S., Mortimer, M., Wahl, W. R., Lomax, D. R., Lippincott, J., & Lovelace, D. M. (2019) · PeerJ · doi:10.7717/peerj.7247 · Cited by 86 · see citing works
“1b-c; Hartman et al. (2019), PeerJ, DOI 10.7717/peerj.7247 18/51 Xu & Wang, 2004: Fig.”
InfluentialMosaic evolution in an asymmetrically feathered troodontid dinosaur with transitional features
Xu, X., Currie, P., Pittman, M., Xing, L., Meng, Q., Lü, J., Hu, D., & Yu, C. (2017) · Nature Communications · doi:10.1038/ncomms14972 · Cited by 86 · see citing works
Self-citationUnenlagiinae revisited: dromaeosaurid theropods from South América
Gianechini, F. A., & Apesteguia, S. (2011) · Anais da Academia Brasileira de Ciências · doi:10.1590/s0001-37652011000100009 · Cited by 56 · see citing works
A new troodontid dinosaur from the Lower Cretaceous Yixian Formation of Liaoning Province, China
SHEN, C., LÜ, J., LIU, S., KUNDRÁT, M., BRUSATTE, S. L., & GAO, H. (2017) · Acta Geologica Sinica - English Edition · doi:10.1111/1755-6724.13307 · Cited by 49 · see citing works
- Authors
- Xing, X., & Xiaolin, W.
- Venue
- Acta Geologica Sinica - English Edition
- Publisher
- Wiley
- Published
- 2004-02
- Volume
- 78
- Issue
- 1
- Pages
- 22-26
- ISSN
- 1000-9515 (ISSN-L)
- 1755-6724
- OpenAlex
- W2166355048
- Cited by
- 62
- References
- 1
- Citations by year
- 2026: 5 · 2025: 3 · 2024: 2 · 2023: 2 · 2022: 3 · 2021: 3 · 2020: 7 · 2019: 5 · 2018: 9 · 2017: 5 · 2016: 1 · 2015: 2 · 2014: 1 · 2012: 1
- FWCI
- 1.41
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Acta Geologica Sinica - English Edition (publishedVersion)
- Funders
- National Geographic Society
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- Topics
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Evolutionary Biology
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Evolution and Paleontology Studies
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Fossil Insects in Amber
- Keywords
- Troodontidae, new genus and species, theropod dinosaurs, Yixian Formation, Lower Cretaceous, Liaoning Province, paravians, Dromaeosauridae, dinosaur evolution, holotype
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