Abstract
A partial dinosaur skeleton from the Upper Triassic (Norian) sediments of South Africa is described and named Antetonitrus ingenipes. It provides the first informative look at a basal sauropod that was beginning to show adaptations towards graviportal quadrupedalism such as an elongated forelimb, a modified femoral architecture, a shortened metatarsus and a changed distribution of weight across the foot. These adaptations allowed the clade to produce the largest-ever terrestrial animals. However, A. ingenipes lacked specializations of the hand found in more derived sauropods that indicate it retained the ability to grasp. Antetonitrus is older than the recently described Isanosaurus from Thailand and is the oldest known definitive sauropod.
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Selected References
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- Buffetaut E., Suteethorn V., Cuny G., Tong H., Le Loeuff J., Khansubha S., Jongautchariyakul S. The earliest known sauropod dinosaur. Nature. 2000 Sep 7;407(6800):72–74. doi: 10.1038/35024060. [DOI] [PubMed] [Google Scholar]
- Flynn JJ, Parrish JM, Rakotosamimanana B, Simpson WF, Whatley RL, Wyss AR. A Triassic Fauna from Madagascar, Including Early Dinosaurs. Science. 1999 Oct 22;286(5440):763–765. doi: 10.1126/science.286.5440.763. [DOI] [PubMed] [Google Scholar]
- Sereno P. C. The evolution of dinosaurs. Science. 1999 Jun 25;284(5423):2137–2147. doi: 10.1126/science.284.5423.2137. [DOI] [PubMed] [Google Scholar]
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