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Isurus retroflexus

Isurus_retroflexus.jpg Heterodontus sp. lateral toothThumbnailsLeymeriella tardefurcata intermediaHeterodontus sp. lateral toothThumbnailsLeymeriella tardefurcata intermediaHeterodontus sp. lateral toothThumbnailsLeymeriella tardefurcata intermediaHeterodontus sp. lateral toothThumbnailsLeymeriella tardefurcata intermediaHeterodontus sp. lateral toothThumbnailsLeymeriella tardefurcata intermediaHeterodontus sp. lateral toothThumbnailsLeymeriella tardefurcata intermediaHeterodontus sp. lateral toothThumbnailsLeymeriella tardefurcata intermedia

Extinct mako shark species, lower lateral tooth.
Location: Massif du Jura, Ain (01), France
Upper Marine Molasse (OMM), Miocene, Burdigalian
17-20 million years old