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As a result, there are many teeth that are a cross between two species. subauriculatus have large cusps, where by late Miocene the cusps are very small.
One of the best examples of megalodon predation evidence is shown in the image above. For comparison T-Rex has been calculated to have a maximum bite force around 57,000 Newtons (13,000 lbs).For more information, here is a great article by Lutz Andres about megalodon evolution.The megatooth shark was clearly a top predator of its time. Some Megalodon shark teeth found have over a 7 inch slant height.Once the Otodus teeth became mostly serrated, paleontologists renamed the serrated Otodus genus to the Carcharocles genus, and thus the Carcharocles genus arose. Paleontologists assigned each slight tooth change of the Megatooth shark to a new Carcharocles species. This lineage example is not complete, as it is missing the Kazakhstan specimens, but it shows the general broadening and cusp reduction.Where the genus transition occurs depends on which paleontologist you ask. It's important to note that each species is the Megatooth shark, with a slight change in tooth form over different periods of time.The actual name "Megalodon" was named by Louis Agassiz in 1843.
Location: Megalodon evolved from Carcharocles Subauriculatus sometime in the Miocene and became extinct at the end of the Pliocene 2.6 million years ago.
The Eocene Tologaysor (say that 3 times in a row) formation in Kazakhstan shows this transition nicely. It is clear the Megatooth shark lineage (Carcharocles) was born from the Otodus lineage. Over time the Megatooth shark went through slight morphological changes.
Each zone of the formation has Otodus teeth that are slightly more serrated over geologic time until they start looking like an early Carcharocles tooth. The teeth became more regularly serrated, the Otodus cusps got smaller, the crown got broader, and the overall size increased. A very rough chronology of Megatooth species, leading to the megalodon is shown below on the following table: This shows the lineage of the Megatoothed sharks leading to the Megalodon.
Evidence suggests the obvious; this prehistoric shark ate whales and other cetacea for breakfast!
It's fossils are almost always found in areas associated with fossil whale bone.
megalodons were a little larger than the modern day Whale Shark, and over twice as large as a Great White shark. Factors for extinction include changing ocean currents, the loss of it's main food source, competition with Killer Whales, and whale migration into arctic waters.