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Sauropod's Gut Contents Offer First Direct Proof of Dinosaur Diet

  • In May 2017, researchers excavated a nearly complete subadult Diamantinasaurus matildae fossil nicknamed Judy near Winton, Queensland, Australia.
  • The team discovered well-preserved gut contents that revealed sauropods were herbivores who barely chewed, confirming long-held but indirect dietary hypotheses.
  • The fossilized abdominal contents included a variety of unchewed plant material such as conifers, seed ferns, and flowering plants, indicating that Judy likely consumed vegetation from different heights within her environment.
  • Lead author Stephen Poropat stated this represents the first genuine sauropod gut contents found worldwide, showing plants were severed but not chewed, supporting bulk feeding over 130 million years.
  • This finding implies sauropods broadly shaped ancient ecosystems as indiscriminate bulk feeders relying on gut microbes for digestion, though the single data point limits broader dietary conclusions.
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Good better beast: Thanks to the fossilized stomach contents of a 100 million year old dino, more is now known about its eating habits. Good chewing was there…

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Phys.org broke the news in United Kingdom on Monday, June 9, 2025.
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