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Sharks of the Genus Isurolamna


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Isurus oxyrinchus & Isurus paucus

Cutting edges of anterior teeth


The anterior teeth morphology of Isurus paucus do not show any particular change from the Oligocene to the Pleistocene.
The cusps of the anterior teeth of Isurus oxyrinchus in the early Miocene are less mesiodistally inclined and more straight than in the present-day species. After the Oligocene, mesiodistal curvature increases, becoming sigmoid-like and sowing more complex morphology. The length of the cutting edges are also gradually shortened accordingly.


 ver. 1. 20230513


 ver. 1. 20230514


 ver. 1. 20230518


 ver. 1. 20230520


 20230910, ver. 1. 20230520


 ver. 1. 20230522


 ver. 1. 20230522

Cutting edges of anterior teeth




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