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The monstrous predator — which measured as long as a great white shark — belongs to a brand new species, according to a Dec. 12 University of Cincinnati news release.
Ptychodus (from Greek: πτυχή ptyche 'fold' and Greek: ὀδούς odoús 'tooth') [1] is a genus of extinct large durophagous (shell-crushing) lamniform sharks from the Cretaceous period, spanning from the Albian to the Campanian. [2] Fossils of Ptychodus teeth are found in many Late Cretaceous marine sediments worldwide. [3]
The behemoth clocked in at a whopping 6 1/6 inches in length—roughly the size of a human hand!
Megalodon sharks were “the size and weight of a railroad car” and reigned over the world’s oceans “roughly 23 to 3.6 million years ago,” according to the National Museum of Natural History.
Aquilolamna is an extinct genus of shark-like elasmobranch from the Late Cretaceous ()-aged Agua Nueva Formation of Mexico.It is currently known to contain only one species, A. milarcae, also known as the eagle shark, and it is classified in its own family Aquilolamnidae, which has been tentatively assigned to the mackerel sharks.
Keasius is an extinct genus of basking sharks that lived during the Cenozoic. It contains four valid species, which have been found in North America , Europe , and Antarctica . [ 1 ] [ 3 ]
A young shark enthusiast vacationing with his family in Myrtle Beach, South Carolina, stumbled upon the find of a lifetime -- a tooth belonging to the largest shark to ever exist.
Galagadon (/ ɡ æ l ʌ ɡ ə d ɒ n /) is an extinct genus of small carpet shark that lived during the Late Cretaceous period. It contains one species, G. nordquistae. It was named after the video game Galaga due to a resemblance between its teeth and the spaceships in the game, [1] and Field Museum volunteer Karen Nordquist.