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Isurus retroflexus

Isurus_retroflexus.jpg Cretolamna appendiculataThumbnailsCretoxyrhina denticulata (Glikman, 1957a)Cretolamna appendiculataThumbnailsCretoxyrhina denticulata (Glikman, 1957a)Cretolamna appendiculataThumbnailsCretoxyrhina denticulata (Glikman, 1957a)Cretolamna appendiculataThumbnailsCretoxyrhina denticulata (Glikman, 1957a)Cretolamna appendiculataThumbnailsCretoxyrhina denticulata (Glikman, 1957a)Cretolamna appendiculataThumbnailsCretoxyrhina denticulata (Glikman, 1957a)Cretolamna appendiculataThumbnailsCretoxyrhina denticulata (Glikman, 1957a)

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