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Fossil Reveals Three‑Tier Predator Chain in Cretaceous Eromanga Sea

Synchrotron imaging verifies the specimen and signals a new focus on predator behavior in Australia's ancient inland sea.

Overview

  • A study published this week in Gondwana Research and high‑resolution synchrotron CT scans confirm a pterosaur was preserved inside the stomach of an ichthyosaur that itself shows bite damage from a giant pliosaur, Kronosaurus.
  • The ichthyosaur measures about 6–7 metres long and contains nodules that CT scans revealed hold fish, squid‑like cephalopods and fragments of a pterosaur jaw.
  • Researchers attribute the large crushing bite marks and missing chunks of the ichthyosaur to Kronosaurus queenslandicus, an apex pliosaur that could reach roughly 14 metres and had a powerful bite.
  • The bones were first found by hobbyists in 2019 near Richmond, Queensland, then excavated and prepared by museum staff and volunteers over hundreds of hours before being scanned and studied.
  • Palaeontologists say the find is one of the clearest direct records of a three‑tier trophic interaction and will draw further scientific study of Eromanga Sea ecosystems and predator behavior.