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Cretoxyrhina (/ k r ɪ ˌ t ɒ k s i ˈ r h aɪ n ə /; meaning 'Cretaceous sharp-nose') is an extinct genus of large mackerel shark that lived about 107 to 73 million years ago during the late Albian to late Campanian of the Late Cretaceous.
Stethacanthidae is an extinct family of prehistoric sharks. [1] It is estimated to have existed approximately between 380 and 300 million years ago. Members of this family are noted for their peculiar dorsal fin.
A Pennsylvania 8-year-old on vacation in SC found a huge fossilized tooth from a long-extinct shark species. ... The largest ones were three times the size of the biggest sharks that exist today.
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]
Carcharomodus is an extinct genus of lamnid shark.Its only species is Carcharomodus escheri, [1] commonly nicknamed the serrated mako shark or Escher's mako shark.It is an extinct lamnid that lived during the Miocene and that was formerly thought to have been transitional between the broad-toothed "mako" Cosmopolitodus hastalis and the modern great white, but is now considered to be an ...
The discovery also provides insight into the evolutionary history of sharks found in our oceans today, experts say. ... or mackerel sharks, the same group that the extinct Otodus megalodon and the ...
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Otodus is an extinct, cosmopolitan genus of mackerel shark which lived from the Paleocene to the Pliocene epoch. The name Otodus comes from Ancient Greek ὠτ- ( ōt- , meaning "ear") and ὀδούς ( odoús , meaning "tooth") – thus, "ear-shaped tooth".