Sept. 17, 2009 - Remains of a shark-bitten, 85-million-year-old plesiosaur reveal that around seven sharks likely consumed the enormous dinosaur-era marine reptile in a feeding frenzy, leaving some of their shark teeth stuck in the plesiosaur's bones, according to a new study.
The findings, which will be presented at next week's 69th Annual Meeting of the Society of Vertebrate Paleontology, are the first direct evidence of the diet and feeding behavior of Cretalamna appendiculata, a now-extinct early relative of today's great white sharks.
The study, which has also been accepted for publication in the Journal of Vertebrate Paleontology, further represents what lead author Kenshu Shimada describes as "arguably the most spectacular case of shark feeding on a vertebrate carcass reported to date."
Shimada is an associate professor at Chicago's DePaul University and research associate in paleontology at the Sternberg Museum of Natural History. He and colleagues Takanobu Tsuihiji, Tamaki Sato and Yoshikazu Hasegawa analyzed the shark-decimated plesiosaur, Futabasaurus suzukii, which was unearthed in central Japan and then housed at the National Museum of Nature and Science in Tokyo.
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Friday, September 18, 2009
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