He believes that the round holes on the surface of ammonite fossils are first made by the home scars of limpets, which made the ammonite shells fragile, and the pressure during the formation of the fossils caused the weak places to collapse. Form a circular hole. In 1998, Professor Yuki Kase made a mosasaur "mechanical tooth", allowing it to bite on the shell of a nautilus. The professor found that the mechanical teeth would bite the carapace into pieces, and it was impossible for a beautiful round hole to appear.
These discoveries changed the wind, and everyone telemarketing list seemed to think that "the ammonite was bitten by the mosasaur" was just a beautiful and romantic misunderstanding. Dino_2_11 Ammonites are one of the favorite foods of mosasaurs. But it's not over yet. In 2001, Canadian professors Cameron J. Tsujita and Gerd EG Westermann wrote a paper to refute Kase's claims one by one. They believe that the mechanical teeth failed to accurately replicate the tooth structure of the mosasaur, the shell of the nautilus is different from the ammonite... and so on.
More importantly, the two of them pointed out that when the Mosasaurus bit through the ammonite, they did not force their teeth to close, but only slowly applied pressure until a hole was punched in the ammonite. Moreover, according to the jaw structure of mosasaurs, they can indeed make such delicate and careful bite movements. The two Canadian professors made other, different arguments, pointing out that Kase's claim that "the holes in the ammonites are all made by limpets" is shaky. It should be mentioned, however, that they do not completely deny that the holes in some ammonite fossils may really be caused by limpets.