Early Cretaceous Terrestrial Weathering in Northern China: Relationship between Paleoclimate Change and the Phased Evolution of the Jehol Biota

2011 ◽  
Vol 119 (1) ◽  
pp. 81-96 ◽  
Author(s):  
Tohru Ohta ◽  
Gang Li ◽  
Hiromichi Hirano ◽  
Takashi Sakai ◽  
Takeshi Kozai ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Northern China ◽  
Jehol Biota ◽  
Paleoclimate Change

Early Cretaceous vertebrates from the Xinlong Formation of Guangxi (southern China): a review

2015 ◽  
Vol 153 (1) ◽  
pp. 143-159 ◽  
Author(s):  
JINYOU MO ◽  
ERIC BUFFETAUT ◽  
HAIYAN TONG ◽  
ROMAIN AMIOT ◽  
LIONEL CAVIN ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Southern China ◽  
Northern China ◽  
Subtropical Climate ◽  
The South ◽  
Jehol Biota ◽  
Oxygen And Carbon Isotope ◽  
Se Asia ◽  
North Eastern ◽  
Vertebrate Assemblage

AbstractThe vertebrate assemblage from the Early Cretaceous non-marine Xinlong Formation of the Napai Basin, in the south-western part of Guangxi Zhuang Autonomous Region (southern China), is reviewed. The assemblage includes chondrichthyans (at least six species of hybodont sharks includingHybodus, Thaiodus, HeteroptychodusandAcrorhizodus), actinopterygians (Halecomorphi and Ginglymodi), turtles (the adocidShachemysand the carettochelyidKizylkumemys), crocodilians (cf.Theriosuchus) and dinosaurs (the sauropodsFusuisaurusandLiubangosaurus, carcharodontosaurid and spinosaurid theropods, iguanodontians and a possible psittacosaurid). This assemblage shows many similarities to those from non-marine formations of the Khorat Group of north-eastern Thailand. It seems to be particularly close to that from the Khok Kruat Formation, considered as Aptian in age, as shown especially by sharks and turtles and by the presence of iguanodontians. An Aptian age is therefore proposed for the Xinlong Formation. A study of the stable oxygen and carbon isotope compositions of reptile apatite suggests that this part of South China experienced subtropical arid conditions during the deposition of the Xinlong Formation. In its composition, the vertebrate fauna from the Xinlong Formation seems to be more similar to coeval faunas from SE Asia than to assemblages from northern China (including the Jehol Biota). Although this may partly reflect different depositional and taphonomic environments (fluvial for the Xinlong Formation versus lacustrine for the Jehol Biota) it seems likely that, during Early Cretaceous time, southern China and SE Asia were part of a distinct zoogeographical province, different from that corresponding to northern China. This may be the result of both climatic differences (with relatively cool climates in northern China versus a subtropical climate in the south) and geographical barriers such as mountain chains.

Astrochronology for the Early Cretaceous Jehol Biota in northeastern China

2013 ◽  
Vol 385 ◽  
pp. 221-228 ◽  
Author(s):  
Huaichun Wu ◽  
Shihong Zhang ◽  
Ganqing Jiang ◽  
Tianshui Yang ◽  
Junhua Guo ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Northeastern China ◽  
Jehol Biota

First evidence for tooth-tooth occlusion in a ctenochasmatid pterosaur from the Early Cretaceous Jehol Biota

2021 ◽  
pp. SP521-2021-141
Author(s):  
Chang-Fu Zhou ◽  
Xinyue Wang ◽  
Jiahao Wang
Keyword(s):  
Early Cretaceous ◽  
Feeding Strategy ◽  
Three Dimensional ◽  
Tooth Wear ◽  
First Record ◽  
Jehol Biota ◽  
Content Type ◽  
Dimensional Reconstruction ◽  
Supplementary Material ◽  
Ct Data

AbstractCtenochasmatid pterosaurs flourished and diversified in the Early Cretaceous Jehol Biota. Here, a partial mandible of Forfexopterus is described based on a three-dimensional reconstruction using high-resolution X-ray Computed Tomography (CT) data. The first nine pairs of functional teeth of the rostral dentition revealed along with their replacements. The functional teeth are evenly arranged with a tooth density of 2.2 teeth/cm. The tooth crown is distinctly reduced from its base to the tip, and framed by two weak ridges, possibly as a pair of vestigial carinae. The replacement teeth are sharp and pointed, and have erupted slightly against the medial surface of the functional teeth. Surprisingly, tooth wear is observed in this specimen, the first record of tooth-tooth occlusion in ctenochasmatids. The wear facets exhibit high-angled lingual and lower-angled labial facets, implying a tooth-tooth occlusion in pterosaur clade. This discovery indicates that the Jehol ctenochasmatids possibly employed a more active feeding strategy than other filter-feeding pterosaurs (e.g. Ctenochasma, Pterodaustro, Gnathosaurus).Supplementary material at https://doi.org/10.6084/m9.figshare.c.5722060

scholarly journals A new wing skeleton of <i>Forfexopterus</i> (Pterosauria: Ctenochasmatidae) from the Early Cretaceous Jehol Biota reveals a developmental variation

Fossil Record ◽  
2020 ◽  
Vol 23 (2) ◽  
pp. 191-196
Author(s):  
Chang-Fu Zhou ◽  
Jiahao Wang ◽  
Ziheng Zhu
Keyword(s):  
Sexual Dimorphism ◽  
Early Cretaceous ◽  
Skeletal Maturity ◽  
Filter Feeding ◽  
Jehol Biota ◽  
Western Liaoning ◽  
Developmental Variation ◽  
The Third

Abstract. In the Jehol Biota, the filter-feeding ctenochasmatid pterosaurs flourished with a high biodiversity. Here, we report a new wing skeleton of the ctenochasmatid Forfexopterus from the Early Cretaceous Jiufotang Formation in Jianchang, western Liaoning, China. The specimen exhibits the sole autapomorphy, the first wing phalanx shorter than the second and longer than the third. Interestingly, it exhibits a skeletal maturity with co-ossified elements, but it is only about 75 % the size of the immature holotype. This discrepancy reveals developmental variation of Forfexopterus, but its relationship with sexual dimorphism needs to be certain by more available material.

A new eucryptodiran turtle from the Early Cretaceous Jiufotang Formation of western Liaoning, China

Zootaxa ◽  
2010 ◽  
Vol 2676 (1) ◽  
pp. 45 ◽  
Author(s):  
CHANG-FU ZHOU
Keyword(s):  
Early Cretaceous ◽  
Cladistic Analysis ◽  
Yixian Formation ◽  
Liaoning Province ◽  
Jehol Biota ◽  
Western Liaoning ◽  
The Third

A new eucryptodiran turtle from the Jiufotang Formation of Lamadong, Jianchang County, represents the third turtle taxon, Liaochelys jianchangensis gen. et sp. nov., from the Jehol Biota of western Liaoning Province, China. This taxon is diagnosed by a character combination including a midline contact of the prefrontals, vertebrals wider than long, third costals strongly expanded distally, and a medial contact of the eighth costals. A preliminary cladistic analysis places Liaochelys jianchangensis along the phylogenetic stem of Cryptodira in a position more derived than the taxa, Manchurochelys manchoukuoensis and Ordosemys liaoxiensis, known from the underlying Yixian Formation. This discovery opens a new window into the osteology and evolution of primitive eucryptodiran turtles.

The first corydalid larva (Megaloptera: Corydalidae) with gut-contents from the Early Cretaceous Jehol biota of northeastern China

2019 ◽  
Vol 100 ◽  
pp. 46-50
Author(s):  
Xiangdong Zhao ◽  
Xianye Zhao ◽  
Bo Wang ◽  
Edmund Jarzembowski ◽  
Yan Fang ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Northeastern China ◽  
Gut Contents ◽  
Jehol Biota

scholarly journals The earliest evidence for a supraorbital salt gland in dinosaurs in new Early Cretaceous ornithurines

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Xia Wang ◽  
Jiandong Huang ◽  
Yuanchao Hu ◽  
Xiaoyu Liu ◽  
Jennifer Peteya ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Late Cretaceous ◽  
High Salinity ◽  
Salt Gland ◽  
Salt Glands ◽  
Apparent Absence ◽  
Jehol Biota ◽  
Marine Birds ◽  
Gland Size ◽  
Foraging Range

AbstractSupraorbital fossae occur when salt glands are well developed, a condition most pronounced in marine and desert-dwelling taxa in which salt regulation is key. Here, we report the first specimens from lacustrine environments of the Jehol Biota that preserve a distinct fossa above the orbit, where the salt gland fossa is positioned in living birds. The Early Cretaceous ornithurine bird specimens reported here are about 40 million years older than previously reported Late Cretaceous marine birds and represent the earliest described occurrence of the fossa. We find no evidence of avian salt gland fossae in phylogenetically earlier stem birds or non-avialan dinosaurs, even in those argued to be predominantly marine or desert dwelling. The apparent absence of this feature in more basal dinosaurs may indicate that it is only after miniaturization close to the origin of flight that excretory mechanisms were favored over exclusively renal mechanisms of salt regulation resulting in an increase in gland size leaving a bony trace. The ecology of ornithurine birds is more diverse than in other stem birds and may have included seasonal shifts in foraging range, or, the environments of some of the Jehol lakes may have included more pronounced periods of high salinity.

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