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• Atokan of United States (1: Indiana)
Beautiful dental plate of Lepidotes pankowskii
The Cobaltoan calcite is a variety of calcite containing Co2+ replacing Ca
Many species had long spines arranged similarly to closely related genera
• Oligocene of Argentina (1)
07324 - Top Huge OTODUS OBLIQUUS (mackerel shark) Tooth Paleocene Parabarrandia • Atokan of United StatesIt has some glued fractures. Otudus is a genus belonging to the shark group known as mackerel sharks. It reigned the seas during the Paleocene and the Eocene (60 45 million years ago). It is a quite dominant species in the phosphate quarries in this sector of Morocco. This species has only been described via its teeth and vertebrae. As all the Elasmobranchii, the skeleton has a cartilaginous non osseous nature, what makes difficult its fossilization