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Sinankylosaurus - Wikipedia

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Sinankylosaurus Temporal range: Late Cretaceous ~77.3–73.5 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Genus:	†Sinankylosaurus Wang et al., 2020
Species:	†S. zhuchengensis
Binomial name
†Sinankylosaurus zhuchengensis Wang et al., 2020

Sinankylosaurus (meaning "Chinese fused lizard") is a genus of dinosaur, originally described as an ankylosaur, from the Late Cretaceous Hongtuya Formation of Shandong, China. The genus contains a single species, Sinankylosaurus zhuchengensis, known from a nearly complete right ilium. The describers claim that the discovery of Sinankylosaurus further demonstrates the similarity between dinosaurs of eastern Asia and western North America.^[1]

Discovery and naming

Beginning in 1964, paleontologists conducted large-scale excavations in Zhucheng and discovered an abundant source of fossils; notably dinosaur fossils.^[2]

ZJZ-183, the holotype specimen, was discovered with the Zhuchengtyrannus holotype in the Upper Cretaceous Wangshi Group (specifically the Hongtuya Formation^[1]) in Zhucheng, Shandong Province, China around 2010.^[3] The fossil was prepared during the following years and was later described in 2020.^[1]

Description

Because it is only known from an ilium, the external appearance of Sinankylosaurus remains unknown. Its describers noted similarities with other ankylosaur ilia, but a 2021 study did not consider it an ankylosaur and called it a nomen dubium.^[4]

Paleoecology

Sinankylosaurus is known from the Hongtuya Formation, part of the Wangshi Group of southern China. Other animals from this group include Sinoceratops, a ceratopsian,^[5] Shantungosaurus, a very common hadrosaurid to which most of the material has been assigned,^[6] Zhuchengtyrannus, an Asian tyrannosaurid related to Tarbosaurus,^[7] Zhuchengceratops, an Asian leptoceratopsid,^[8] and material tentatively assigned to Tyrannosaurus.

References

^ ^a ^b ^c Wang, K. B.; Zhang, Y. X.; Chen, J.; Chen, S. Q.; Wang, P. Y. (2020). "A new ankylosaurian from the Late Cretaceous strata of Zhucheng, Shandong Province". Geological Bulletin of China (in Chinese). 39 (7): 958–962.
^ Wangshi Group in the Paleobiology Database
^ "Shandong discovers new dinosaur with spikes!". yqqlm. 20 August 2020. Retrieved 21 August 2020.^{[dead link‍]}
^ Wenjie Zheng; Masateru Shibata; Chun-Chi Lao; Soki Hattori; Dongchun Jin; Changzhu Jin; Xing Xu (2021). "First definitive ankylosaurian dinosaur from the Cretaceous of Jilin Province, northeastern China". Cretaceous Research. 127 (104953): 104953. Bibcode:2021CrRes.12704953Z. doi:10.1016/j.cretres.2021.104953.
^ Xu, X., Wang, K., Zhao, X. & Li, D. (2010). "First ceratopsid dinosaur from China and its biogeographical implications". Chinese Science Bulletin. 55 (16): 1631–1635. Bibcode:2010ChSBu..55.1631X. doi:10.1007/s11434-009-3614-5. S2CID 128972108.{{cite journal}}: CS1 maint: multiple names: authors list (link)
^ Hu, C.C. (1973). "[A new hadrosaur from the Cretaceous of Chucheng, Shantung]". Acta Geologica Sinica. 2: 179–206.
^ Hone, D. W. E.; Wang, K.; Sullivan, C.; Zhao, X.; Chen, S.; Li, D.; Ji, S.; Ji, Q.; Xu, X. (2011). "A new, large tyrannosaurine theropod from the Upper Cretaceous of China". Cretaceous Research. 32 (4): 495–503. Bibcode:2011CrRes..32..495H. doi:10.1016/j.cretres.2011.03.005.
^ Xing Xu; Kebai Wang; Xijin Zhao; Corwin Sullivan; Shuqing Chen (2010). "A New Leptoceratopsid (Ornithischia: Ceratopsia) from the Upper Cretaceous of Shandong, China and Its Implications for Neoceratopsian Evolution". PLOS ONE. 5 (11): e13835. Bibcode:2010PLoSO...513835X. doi:10.1371/journal.pone.0013835. PMC 2973951. PMID 21079798.

Ankylosauria

Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Ornithischia
Clade: Thyreophora

Avemetatarsalia

- see Avemetatarsalia

Ornithischia

see Ornithischia
Ankylosauria	see below↓

Ankylosauria

Ankylosauria

Cryptosaurus Dracopelta Minmi Priodontognathus Sarcolestes Serendipaceratops? Sinankylosaurus Spicomellus Stegosaurides? Tianchisaurus Vectipelta
Parankylosauria	Antarctopelta Kunbarrasaurus? Stegouros

Acantholipan Ahshislepelta? Borealopelta Niobrarasaurus Nodosaurus Patagopelta Peloroplites? Sauropelta Silvisaurus Tatankacephalus
Panoplosaurini	Animantarx Denversaurus Edmontonia Panoplosaurus Texasetes
Struthiosaurini	Europelta Hungarosaurus Pawpawsaurus Stegopelta Struthiosaurus

Ankylosauridae

Shamosaurinae

Ankylosaurinae

Bissektipelta Crichtonpelta Crichtonsaurus Datai Jinyunpelta Minotaurasaurus Pinacosaurus Saichania Shanxia? Tarchia Tianzhenosaurus? Tsagantegia Zaraapelta
Ankylosaurini	Akainacephalus Ankylosaurus Anodontosaurus Dyoplosaurus Euoplocephalus Nodocephalosaurus Oohkotokia Platypelta Scolosaurus Talarurus Ziapelta Zuul

See also: Timeline
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