Isolated dinosaur teeth from the Lower Cretaceous Shahai and Fuxin formations of northeastern China

Amiot, Romain; Kusuhashi, Nao; Xu, Xing; Wang, Yuanqing

doi:10.1016/j.jseaes.2010.04.017

Cited by 17 publications

(8 citation statements)

References 62 publications

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“…On the other hand, sub-circular swelling or boss developed on the unworn part of the lingual crown surface (Barrett and Wang 2007, Wilson and Upchurch 2009, Amiot et al 2010, which is characteristic in Euhelopus, is not seen on any teeth of the first group. Therefore, the possibility that Euhelopus and basal titanosauriforms similar to it are included in the first group is extremely low.…”

Section: Comparisonsmentioning

confidence: 91%

Titanosauriform teeth from the Cretaceous of Japan

Saegusa

Tomida

2011

An. Acad. Bras. Ciênc.

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Sauropod teeth from six localities in Japan were reexamined. Basal titanosauriforms were present in Japan during the Early Cretaceous before Aptian, and there is the possibility that the Brachiosauridae may have been included. Basal titanosauriforms with peg-like teeth were present during the "mid" Cretaceous, while the Titanosauria with peg-like teeth was present during the middle of Late Cretaceous. Recent excavations of Cretaceous sauropods in Asia showed that multiple lineages of sauropods lived throughout the Cretaceous in Asia. Japanese fossil records of sauropods are conformable with this hypothesis.

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Section: Comparisonsmentioning

confidence: 91%

Titanosauriform teeth from the Cretaceous of Japan

Saegusa

Tomida

2011

An. Acad. Bras. Ciênc.

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“…The Aptian-Albian Shahai Formation in China has yielded teeth assigned to cf. Euhelopus [401,402], whereas the coeval On Gong Formation has produced the somphospondylan Mongolosaurus [69,72], which preserves both broad and narrow teeth. Four sauropod taxa have been established from the Aptian-Albian Haoling Formation: 'Huanghetitan' ruyangensis [403], Ruyangosaurus [404], Xianshanosaurus [405] and Yunmenglong [406].…”

Section: The Berriasian-turonian Sauropod Body Fossil Recordmentioning

confidence: 99%

Sauropod dinosaur teeth from the lower Upper Cretaceous Winton Formation of Queensland, Australia and the global record of early titanosauriforms

et al. 2022

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The Upper Cretaceous Winton Formation of Queensland, Australia, has produced several partial sauropod skeletons, but cranial remains—including teeth—remain rare. Herein, we present the first description of sauropod teeth from this formation, based on specimens from three separate sites. An isolated tooth and a dentary fragment from the Diamantinasaurus matildae type locality are considered to be referable to that titanosaurian taxon. A single tooth from the D. matildae referred specimen site is similarly regarded as being part of that individual. Seventeen teeth from a new site that are morphologically uniform, and similar to the teeth from the two Diamantinasaurus sites, are assigned to Diamantinasauria. All sauropod teeth recovered from the Winton Formation to date are compressed-cone-chisel-shaped, have low slenderness index values (2.00–2.88), are lingually curved at their apices, mesiodistally convex on their lingual surfaces, and lack prominent carinae and denticles. They are markedly different from the chisel-like teeth of derived titanosaurs, more closely resembling the teeth of early branching members of the titanosauriform radiation. This provides further support for a ‘basal’ titanosaurian position for Diamantinasauria. Scanning electron microscope microwear analysis of the wear facets of several teeth reveals more scratches than pits, implying that diamantinasaurians were mid-height (1–10 m) feeders. With a view to assessing the spatio-temporal distribution of sauropod tooth morphotypes before and after deposition of the Winton Formation, we provide a comprehensive continent-by-continent review of the early titanosauriform global record (Early to early Late Cretaceous). This indicates that throughout the Early–early Late Cretaceous, sauropod faunas transitioned from being quite diverse at higher phylogenetic levels and encompassing a range of tooth morphologies at the start of the Berriasian, to faunas comprising solely titanosaurs with limited dental variability by the end-Turonian. Furthermore, this review highlights the different ways in which this transition unfolded on each continent, including the earliest records of titanosaurs with narrow-crowned teeth on each continent.

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“…Several mammals, including eutriconodontans, spalacotheriids, multituberculates, stem zatherian and eutherians (Hu et al 2005;Li et al 2005;Kusuhashi et al 2009aKusuhashi et al , b, 2010Kusuhashi et al , 2016, have been reported from the Badaohao locality, as well as some dinosaur teeth and eggs (Xu et al 1998;Zhao & Zhao 1999;Amiot et al 2010), and fishes (Jin 1996). Other fossil vertebrates, including lizards and frogs, have been recovered from the locality and are currently under study.…”

Section: Geological Backgroundmentioning

confidence: 99%

A new choristodere (Reptilia: Choristodera) from an Aptian–Albian coal deposit in China

Dong

Matsumoto

Kusuhashi

et al. 2020

Journal of Systematic Palaeontology

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Choristoderes are a small clade of freshwater aquatic reptiles known from deposits of Jurassic to Miocene age. They show their greatest diversity in the Early Cretaceous of Asia, with seven recorded genera including longirostrine and brevirostine taxa, long-and short-necked taxa, and representatives of both neochoristoderes and non-neochoristoderes. The latter, informal grouping, comprising Monjurosuchus, Philydrosaurus, Hyphalosaurus, Khurendukhosaurus, and, probably, Shokawa, is distinguished by the closure of the lower temporal fenestra. This differentiates them from typically diapsid stem choristoderes like the Jurassic Euramerican Cteniogenys and from all neochoristoderes like Champsosaurus and Simoeodosaurus. The recent description of Coeruleodraco jurassicus from the Callovian/Oxfordian of China provided the first example of an Asian non-neochoristodere with an open lower temporal fenestra. Herein we describe a second, geologically younger, genus and species from the Shahai Formation of Badaohao locality in western Liaoning, considered to be Aptian-Albian in age. This adds the eighth genus of choristoderes to the Early Cretaceous Asian record. The new species shares the diapsid skull morphology of C. jurassicus, demonstrating that a lineage of small, brevirostrine choristoderes with fully diapsid skulls persisted in Asia until the latter part of the Early Cretaceous.

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Isolated dinosaur teeth from the Lower Cretaceous Shahai and Fuxin formations of northeastern China

Cited by 17 publications

References 62 publications

Titanosauriform teeth from the Cretaceous of Japan

Titanosauriform teeth from the Cretaceous of Japan

Sauropod dinosaur teeth from the lower Upper Cretaceous Winton Formation of Queensland, Australia and the global record of early titanosauriforms

A new choristodere (Reptilia: Choristodera) from an Aptian–Albian coal deposit in China

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