A New Titanosauriform Sauropod from the Early Late Cretaceous of Dongyang, Zhejiang Province

Lü, Junchang; Azuma, Yoichi; Rong-jun, Chen; Zheng, Wenjie; Jin, Xiao‐Feng

doi:10.1111/j.1755-6724.2008.tb00572.x

Cited by 38 publications

(11 citation statements)

References 14 publications

(11 reference statements)

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“…Despite these restrictions, this still enabled an improved and revised understanding of the anatomy of Dongyangosaurus compared to that provided by Lü et al . [61]. Here, we present a brief update to Lü et al .…”

Section: Additional Anatomical Information On Dongyangosaurus Sinensismentioning

confidence: 99%

“…Regardless, it means that the lateral surface largely faces posteriorly, such that the view presented in Lü et al . [61, pl. 2, fig.…”

Section: Additional Anatomical Information On Dongyangosaurus Sinensismentioning

confidence: 99%

“…Lü et al . [61] considered Dongyangosaurus to be a ‘basal’ titanosaur, given that it lacks procoelous caudal vertebrae. Whereas D'Emic [40] optimized Dongyangosaurus as a euhelopodid somphospondylan, other authors have regarded it as a titanosaur, although its position is unstable.…”

Section: Introductionmentioning

confidence: 99%

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New information on the Cretaceous sauropod dinosaurs of Zhejiang Province, China: impact on Laurasian titanosauriform phylogeny and biogeography

et al. 2019

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Titanosaurs were a globally distributed clade of Cretaceous sauropods. Historically regarded as a primarily Gondwanan radiation, there is a growing number of Eurasian taxa, with several putative titanosaurs contemporaneous with, or even pre-dating, the oldest known Southern Hemisphere remains. The early Late Cretaceous Jinhua Formation, in Zhejiang Province, China, has yielded two putative titanosaurs, Jiangshanosaurus lixianensis and Dongyangosaurus sinensis . Here, we provide a detailed re-description and diagnosis of Jiangshanosaurus , as well as new anatomical information on Dongyangosaurus . Previously, a ‘derived’ titanosaurian placement for Jiangshanosaurus was primarily based on the presence of procoelous anterior caudal centra. We show that this taxon had amphicoelous anterior-middle caudal centra. Its only titanosaurian synapomorphy is that the dorsal margins of the scapula and coracoid are approximately level with one another. Dongyangosaurus can clearly be differentiated from Jiangshanosaurus , and displays features that indicate a closer relationship to the titanosaur radiation. Revised scores for both taxa are incorporated into an expanded phylogenetic data matrix, comprising 124 taxa scored for 548 characters. Under equal weights parsimony, Jiangshanosaurus is recovered as a member of the non-titanosaurian East Asian somphospondylan clade Euhelopodidae, and Dongyangosaurus lies just outside of Titanosauria. However, when extended implied weighting is applied, both taxa are placed within Titanosauria. Most other ‘middle’ Cretaceous East Asian sauropods are probably non-titanosaurian somphospondylans, but at least Xianshanosaurus appears to belong to the titanosaur radiation. Our analyses also recover the Early Cretaceous European sauropod Normanniasaurus genceyi as a ‘derived’ titanosaur, clustering with Gondwanan taxa. These results provide further support for a widespread diversification of titanosaurs by at least the Early Cretaceous.

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Section: Additional Anatomical Information On Dongyangosaurus Sinensismentioning

confidence: 99%

“…Regardless, it means that the lateral surface largely faces posteriorly, such that the view presented in Lü et al . [61, pl. 2, fig.…”

Section: Additional Anatomical Information On Dongyangosaurus Sinensismentioning

confidence: 99%

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New information on the Cretaceous sauropod dinosaurs of Zhejiang Province, China: impact on Laurasian titanosauriform phylogeny and biogeography

et al. 2019

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“…Tambatitanis is distinguished from all of the sauropods for which the neural spines of the anterior caudal vertebrae are known by its very unique morphology of the anterior neural spine. The following East Asian titanosauriforms that have amphicoelous or amphiplatyan caudal centra lack this unique morphology of the anterior neural spine: Dongyangosaurus (Lü et al 2008); Fusuisaurus (Mo et al 2006); Huabeisaurus (Pang and Cheng 2000); Huanghetitan liujiaxiaensis (You et al 2006); "Huanghetitan" ruyangensis (Lü et al 2007); Phuwiangosaurus (Martin et al1999;Suteethorn et al 2009), and Yunmenglong (Lü et al 2013). A fragment of the neural spine of an anterior caudal is the only the caudal element known for Qingxiusaurus (Mo et al 2008), but the spine differs from that of Tambatitanis in being anteroposteriorly flat and transversely wide.…”

Section: Taxonomic Remarks and Phylogenetic Analysismentioning

confidence: 99%

A new titanosauriform sauropod (Dinosauria: Saurischia) from the Lower Cretaceous of Hyogo, Japan

Saegusa

Ikeda

2014

Zootaxa

477

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A new genus and species of titanosauriform sauropod is erected based on a partial skeleton found in the Lower Cretaceous Sasayama Group of Hyogo Prefecture, SW Japan. The new taxon is here named as Tambatitanis amicitiae gen. et sp. nov., which is diagnosed by the following features of the caudal vertebrae, chevrons and braincase: the postzygapophysis and the summit of the neural spine of the anterior caudal vertebrae are located beyond the posterior border of the centrum, the spine of the anterior caudal vertebrae is curved strongly anteriorly and bow-shaped in lateral view, the summit of the neural spine is expanded and hemispherical with its anterior face excavated by the posterodorsal extension of a deep and narrow SPRF, the transverse process of the anterior caudal vertebrae are short and L shaped, the anterior chevron is the longest among sauropods in proportion to body size, the distal ends of the anterior chevrons are rod-shaped, the distal ends of the mid chevrons are transversely thin and anteroposteriorly long without cranial processes, and the dorsal border of the shaft of the paroccipital process that forms the ventral margin of the posttemporal fenestra is short mediolaterally and V-shaped in posterior view. A phylogenetic analysis suggests that T. amicitiae is a basal titanosauriform, possibly belonging to the East Asian endemic clade Euhelopodidae. The caudals and chevrons are described in detail in order to document highly autapomorphic features of the new taxon as well as potentially phylogenetically informative characters. The discovery of T. amicitiae suggests that East Asian basal titanosauriforms were diverse not only in the number of the taxa but also in the morphological variation of the caudal elements.

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“…To date, nine titanosauriform genera have been described from the Upper Cretaceous of China (Fig. 1), including Sonidosaurus from the Erlian Formation of Inner Mongolia (Xu et al 2006), Borealosaurus from the Sunjiawan Formation of Liaoning Province (You et al 2004), Huabeisaurus from the Huiquanpu Formation of Shanxi Province (Pang & Cheng 2000), Zhuchengtitan from the Wangshi Group of Shandong Province (Mo et al 2017), Gannansaurus from the Nanxiong Formation of Jiangxi Province (Lü et al 2013b), Qingxiusaurus from Upper Cretaceous red beds in Guangxi Province (Mo et al 2008), Jiangshanosaurus and Dongyangosaurus from the Jinhua Formation of Zhejiang Province (Tang et al, 2001;Lü et al 2008;Yu et al, 2010), and Baotianmansaurus from the Xiaguan Formation of Henan Province (Zhang et al 2009;Wang et al, 2013). The situation in China conforms to a wider biogeographic pattern, in that Titanosauriformes is the only sauropod clade known to have been present in the Cretaceous of Asia as a whole (Wilson, 2005;Wilson and Upchurch, 2009).…”

Section: Introductionmentioning

confidence: 99%

Peer Review #2 of "New titanosauriform (Dinosauria: Sauropoda) specimens from the Upper Cretaceous Daijiaping Formation of southern China (v0.1)"

Whitlock¹

2019

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Titanosauriform sauropod dinosaurs were once considered rare in the Upper Cretaceous of Asia, but a number of titanosauriforms from this stratigraphic interval have been discovered in China in recent years. In fact, all adequately known Cretaceous Asian sauropods are titanosauriforms, but only a few have been well studied, lending significance to any new anatomical information that can be extracted from Asia's Cretaceous sauropod record. Here we give a detailed description of some titanosauriform bones recovered recently from the Upper Cretaceous Daijiaping Formation of Tianyuan County, Zhuzhou City, Hunan Province, southern China. The occurrence of this material in Hunan increases the known geographic range of titanosauriforms in eastern Asia. Although all of the specimens discussed in this paper can be assigned to Titanosauriformes at least tentatively, some bones display a limited number of features that are more typical of basal sauropods and/or derived diplodocoids, suggesting complex patterns of character evolution within Neosauropoda.

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A New Titanosauriform Sauropod from the Early Late Cretaceous of Dongyang, Zhejiang Province

Cited by 38 publications

References 14 publications

New information on the Cretaceous sauropod dinosaurs of Zhejiang Province, China: impact on Laurasian titanosauriform phylogeny and biogeography

New information on the Cretaceous sauropod dinosaurs of Zhejiang Province, China: impact on Laurasian titanosauriform phylogeny and biogeography

A new titanosauriform sauropod (Dinosauria: Saurischia) from the Lower Cretaceous of Hyogo, Japan

Peer Review #2 of "New titanosauriform (Dinosauria: Sauropoda) specimens from the Upper Cretaceous Daijiaping Formation of southern China (v0.1)"

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