New material of a troodontid theropod (Dinosauria: Saurischia) from the Lower Cretaceous of Mongolia
Abstract
New material of a troodontid theropod from Khamaryn Ar in Mongolia, representing the second troodontid specimen described from the Lower Cretaceous of the Gobi Basin, is reported. This material consists mainly of caudal, manual and pedal bones, and can be assigned to Troodontidae based on the presence of derived features such as distal caudals bearing sulci on neural arches instead of neural spines, asymmetrical pes with slender metatarsal II and robust metatarsal IV, and pedal phalanx II-2 with the distal articular surface less than half the size of the proximal surface. The present specimen is considered merely as Troodontidae gen. et sp. indet. because of the lack of definitive autapomorphies. The present finding suggests that further exploration of the Lower Cretaceous in the Gobi Basin may still provide much new information on the theropod fauna in this region.
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The recently named Sinovenatorinae are the first branching troodontids, including Mei, Sinovenator, Xiaotingia, Jianianhualong, and unnamed IGM 100/140.
“The recently named Sinovenatorinae are the first branching troodontids, including not only Mei and the eponymous Sinovenator, but also Xiaotingia, Jianianhualong, and unnamed IGM 100/140 described by Tsuihiji et al. (2015).”
From A new paravian dinosaur from the Late Jurassic of North America supports a late acquisition of avian flight (2019) · cites this paper as Tsuihiji et al. (2015)
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A Jurassic avialan dinosaur from China resolves the early phylogenetic history of birds
Godefroit, P., Cau, A., Dong-Yu, H., Escuillié, F., Wenhao, W., & Dyke, G. (2013) · Nature · doi:10.1038/nature12168 · Cited by 216 · cited 1× · see citing works
“…bears a longitudinal groove, instead of a neural spine, on the dorsal surface of the neural arch (Figure 2(A)–(L)) as observed in troodontids more derived than Anchiornis (Turner et al. 2012; note, however, that Anchiornis was placed as a basal avialans in the analysis by Godefroit et al. 2013).”
BackgroundGao, 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
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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
“The recently named Sinovenatorinae are the first branching troodontids, including not only Mei and the eponymous Sinovenator, but also Xiaotingia, Jianianhualong, and unnamed IGM 100/140 described by Tsuihiji et al. (2015).”
BackgroundA 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
- Tsuihiji, T., Barsbold, R., Watabe, M., Tsogtbaatar, K., Suzuki, S., & Hattori, S.
- Affiliations
- The University of Tokyo (JP)
- Osaka City University (JP)
- Mongolian Academy of Sciences (MN)
- Hayashibara Museum of Natural Sciences (JP)
- Corresponding author
- Tsuihiji, Takanobu
- Venue
- Historical Biology
- Publisher
- Informa UK Limited
- Published
- 2015-10
- Volume
- 28
- Issue
- 1-2
- Pages
- 128-138
- ISSN
- 0891-2963 (ISSN-L)
- 1029-2381
- OpenAlex
- W1875804600
- Cited by
- 20
- References
- 2
- Citations by year
- 2026: 2 · 2025: 3 · 2024: 2 · 2022: 1 · 2021: 1 · 2020: 3 · 2019: 5 · 2017: 3
- FWCI
- 0.76
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Historical Biology (publishedVersion)
- Funders
- Japan Science Society
- 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, theropod dinosaurs, Lower Cretaceous, caudal vertebrae, autapomorphies
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