Theropod tracks from Upper Jurassic Dongxing Formation of China + neosuchian remains from Cretaceous of France (free pdfs)
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Ben Creisler
Jul 25, 2025, 12:02:46 AM7/25/25
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Ben Creisler
Lida Xing, Jinyou Mo, Hang Yin, Guan He, Zhiyu Liang, Qiyan Chen, Eric Buffetaut & Haiyan Tong (2025)
Theropod tracks from the Upper Jurassic Dongxing Formation Dongxing City and an overview of dinosaur assemblages from Guangxi, China
Earth History and Biodiversity 100031
doi: https://doi.org/10.1016/j.hisbio.2025.100031
https://www.sciencedirect.com/science/article/pii/S2950475925000152
Highlights
A detailed description of the Late Jurassic theropod tracks in Dongxing.
The Dongxing dinosaur trackmakers include at least two types.
The similarities of the Jurassic dinosaur faunas of the Guangxi and Sichuan basin.
A southern zoogeographical region existed in southern China and Southeast Asia in K1.
Abstract
Guangxi Zhuang Autonomous Region is an important region for dinosaur fossil discoveries in southern China, but its Jurassic dinosaur record remains relatively sparse. In 2021, dinosaur tracks were first discovered in Nanmushan Village, Dongxing City, which is currently the southernmost known dinosaur fossil record in China. The Nanmushan track site preserved at least seven theropod tracks. The morphotype A is tentatively assigned to cf. Chongqingpus, which belongs to the Eubrontes morphotype tracks. Morphotype B is more poorly preserved, but indicates the presence of larger theropods in the region. This study also reviews the stratigraphic sequences of the Jurassic-Cretaceous deposits in Guangxi, identifying 14 tetrapod fossil sites from the Jurassic to the Cretaceous. Regional comparison of the dinosaur assemblages reveals a high degree of similarity between the Middle-Upper Jurassic dinosaur fauna of Guangxi and that of the Sichuan Basin. The early Cretaceous faunal assemblage of the Xinlong Formation is very similar to that of northeastern Thailand, suggesting the possible existence of a distinct “southern” zoogeographical region in southern China and Southeast Asia. This research provides new evidence for the reconstruction of the Mesozoic dinosaur diversity and palaeoecological patterns in the Guangxi region.
Jeremy E. Martin & Romain Jattiot (2025)
First report of neosuchian remains in Aptian–Albian marine deposits of southeastern France
Proceedings of the Geologists' Association 101132
https://doi.org/10.1016/j.pgeola.2025.101132
https://www.sciencedirect.com/science/article/pii/S0016787825000410
The European fossil record of crocodylomorphs during the Cretaceous is indubitably skewed towards the lowermost and uppermost strata. Neosuchian remains from the Aptian–Albian interval are exceptionally rare in marine deposits globally. Yet, they potentially hold important information for understanding the phylogenetic interrelationships of several neosuchian lineages. Here, we assign a single squamosal to cf. Pholidosauridae and some postcranial elements to Neosuchia indet. from Aptian and Albian marine deposits in southeastern France. Although it is presently impossible to ascertain the continental versus marine origin of the specimens, their rare occurrence calls for future investigations of the diversity and interrelationships of neosuchians during the mid-Cretaceous.
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Recent papers:
Free pdf:
Lida Xing, Jinyou Mo, Hang Yin, Guan He, Zhiyu Liang, Qiyan Chen, Eric Buffetaut & Haiyan Tong (2025)
Theropod tracks from the Upper Jurassic Dongxing Formation Dongxing City and an overview of dinosaur assemblages from Guangxi, China
Earth History and Biodiversity 100031
doi: https://doi.org/10.1016/j.hisbio.2025.100031
https://www.sciencedirect.com/science/article/pii/S2950475925000152
Highlights
A detailed description of the Late Jurassic theropod tracks in Dongxing.
The Dongxing dinosaur trackmakers include at least two types.
The similarities of the Jurassic dinosaur faunas of the Guangxi and Sichuan basin.
A southern zoogeographical region existed in southern China and Southeast Asia in K1.
Abstract
Guangxi Zhuang Autonomous Region is an important region for dinosaur fossil discoveries in southern China, but its Jurassic dinosaur record remains relatively sparse. In 2021, dinosaur tracks were first discovered in Nanmushan Village, Dongxing City, which is currently the southernmost known dinosaur fossil record in China. The Nanmushan track site preserved at least seven theropod tracks. The morphotype A is tentatively assigned to cf. Chongqingpus, which belongs to the Eubrontes morphotype tracks. Morphotype B is more poorly preserved, but indicates the presence of larger theropods in the region. This study also reviews the stratigraphic sequences of the Jurassic-Cretaceous deposits in Guangxi, identifying 14 tetrapod fossil sites from the Jurassic to the Cretaceous. Regional comparison of the dinosaur assemblages reveals a high degree of similarity between the Middle-Upper Jurassic dinosaur fauna of Guangxi and that of the Sichuan Basin. The early Cretaceous faunal assemblage of the Xinlong Formation is very similar to that of northeastern Thailand, suggesting the possible existence of a distinct “southern” zoogeographical region in southern China and Southeast Asia. This research provides new evidence for the reconstruction of the Mesozoic dinosaur diversity and palaeoecological patterns in the Guangxi region.
=====
Free pdf:
Jeremy E. Martin & Romain Jattiot (2025)
First report of neosuchian remains in Aptian–Albian marine deposits of southeastern France
Proceedings of the Geologists' Association 101132
https://doi.org/10.1016/j.pgeola.2025.101132
https://www.sciencedirect.com/science/article/pii/S0016787825000410
The European fossil record of crocodylomorphs during the Cretaceous is indubitably skewed towards the lowermost and uppermost strata. Neosuchian remains from the Aptian–Albian interval are exceptionally rare in marine deposits globally. Yet, they potentially hold important information for understanding the phylogenetic interrelationships of several neosuchian lineages. Here, we assign a single squamosal to cf. Pholidosauridae and some postcranial elements to Neosuchia indet. from Aptian and Albian marine deposits in southeastern France. Although it is presently impossible to ascertain the continental versus marine origin of the specimens, their rare occurrence calls for future investigations of the diversity and interrelationships of neosuchians during the mid-Cretaceous.
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