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Stethacanthus is an extinct genus of shark-like cartilaginous fish which lived from the Late Devonian to Late Carboniferous epoch, dying out around 298.9 million years ago. Fossils have been found in Australia, Asia, Europe and North America.
The taxonomic history of the Family Stethacanthidae has been rather complicated because the findings of complete skeletons are very unusual, and as result early workers such as St. John & Worthen, [3] and Newberry [4] were unable to recognise the association of the spine, dentition teeth, and dermal denticles of these sharks.
Otodus chubutensis, [1] meaning "ear-shaped tooth of Chubut", from Ancient Greek ὠτ (ōt, meaning "ear") and ὀδούς (odoús, meaning "tooth") – thus, "ear-shaped tooth", is an extinct species of prehistoric megatoothed sharks in the genus Otodus, that lived during Oligocene, Miocene, and Pliocene, in ~28–5.3 milions years ago. [2]
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".
Helicoprion is a genus of extinct shark-like [1] eugeneodont fish. Almost all fossil specimens are of spirally arranged clusters of the individuals' teeth, called "tooth whorls", which in life were embedded in the lower jaw. As with most extinct cartilaginous fish, the skeleton is mostly unknown.
The sharks were about 50 feet long, experts say.
The shark was an opportunist and piscivorous, and it would have also gone after smaller fish and other sharks. [52] Many whale bones have been found with deep gashes most likely made by their teeth. [ 28 ] : 75 Various excavations have revealed megalodon teeth lying close to the chewed remains of whales, [ 28 ] : 75 [ 30 ] and sometimes in ...
The 8-year-old Lebanon, Pennsylvania, boy started digging in the soil, clay and gravel and pulled out a huge fossilized tooth from the long-extinct angustiden shark species, that was 22 million to ...