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Megalodon teeth can measure over 180 millimeters (7.1 in) in slant height (diagonal length) and are the largest of any known shark species, [29]: 33 implying it was the largest of all macropredatory sharks. [35] In 1989, a nearly complete set of megalodon teeth was discovered in Saitama, Japan.
Their bodies were similar to the modern gray reef sharks, but the shape of the teeth is strikingly similar to that of a tiger shark. The teeth are numerous, relatively small, with a curved crown and serrated, up to 2.5 – 3 cm in height. Large numbers of fossil teeth have been found in Europe, North Africa, and North America. [4]
Last year, older son Collin, 10, found a 4-inch megalodon tooth, a species that came after the angustiden and the largest fish that ever lived, according to Encyclopedia Britannica. The largest ...
The megalodon, which went extinct 2.6 million years ago, is estimated to have been between 52 and 59 feet long, which is nearly three times the size of an average great white shark.
Fossil evidence of Cretalamna is found in deposits representing a diverse set of marine environments, indicating that it was able to adapt to a wide range of habitats. This may have attributed to its ability to exist through a long temporal range. [24] The fusiform body of Cretalamna suggests it was a pelagic shark. [35]
Any fossils, including fossil shark teeth, are preserved in sedimentary rocks after falling from their mouth. [13] The sediment that the teeth were found in is used to help determine the age of the shark tooth due to the fossilization process. [15] Shark teeth are most commonly found between the Upper Cretaceous and Tertiary periods. [16]
There are modern shell-crushing species, the largest being the Zebra shark, which reaches a maximum length of a little over 3.5 meters (12 feet) — not near as gigantic as Ptychodus.
This morphological build allows the shark to be partially warm-blooded, [50] and thus efficiently function in the colder environments where Cretoxyrhina has been found. Fossils have been found in areas where paleoclimatic estimates show a surface temperature as low as 5 °C (41 °F).