We report on well-preserved upper and lower jaws found inside the body chambers of two specimens of Didymoceras nebrascense (Meek and Hayden, 1856) from the Upper Cretaceous Pierre Shale of the USA. The finds are described and compared to existing material, and their possible functions are discussed.
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Journal of Paleontology
Vol. 84 • No. 3
May 2010
Vol. 84 • No. 3
May 2010
ammonite jaw
Ancyloceratina
aptychus
Cretaceous
Didymoceras nebrascense