Fig. 1: The jaws of Dalatias licha (kitefin shark). The shark’s lower teeth form a continuous cutting edge with which it can bite pieces out of larger animals.
Fig. The jaws of Dalatias licha (kitefin shark). The shark's lower teeth form a continuous cutting edge with which it can bite pieces out of larger animals. Manuel Staggl Analysis using X-ray computed tomography and 3D reconstructions An international research team led by Faviel A. López-Romero of the University of Vienna investigated how the jaw shape of sharks has changed over the course of evolution. Their conclusion: in the most widespread shark species, the jaws show relatively little variation in shape over millions of years; most variable jaws were found for deep-sea sharks. The results of this study were published in the journal Communications Biology . One of the most prominent traits in sharks is the shape of their lower jaws, which bear also impressive teeth.
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