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Ptychodus was a large shark, previously estimated at 10 meters (33 feet) long based on extrapolation from teeth. [ 13 ] [ 14 ] The subadult specimen with the largest vertebra showed that it could reach lengths of 4.3–7.07 m (14.1–23.2 ft), so a 10 m (33 ft) length is possible, but more analysis is required for verification.
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.
The fossils of Otodus sharks indicate that they were very large macro-predatory sharks. [7] The largest known teeth of O. obliquus measure about 104 millimetres (4.1 in) in height. [8] The vertebral centrum of this species are over 12.7 cm (5 inch) wide. [7] Scientists suggest that O. obliquus would have measured about 8–9 metres (26–30 ft ...
The maximum size of the whale shark is uncertain. Various reports suggest individuals around 18 metres (59 ft), but many of these reports lack detailed measurements and documentation. McClain et al. (2015) consider this whale shark as the largest reliably measured. [9] Meekan et al. (2020) studied whale sharks over a 10-year period.
Extinct: Hexanchidae: Cow sharks: 3 extant 5 extinct 5 extant 31 extinct Cow sharks are considered the most primitive of all the sharks, because their skeletons ...
A 2017 study by PhD student Humberto Ferron analyzed the relationships between the morphological variables including the skeleton and tail fin of C. mantelli and modeled an average cruising speed of 12 km/h (7.5 mph) and a burst swimming speed of around 70 km/h (43 mph), making Cretoxyrhina possibly one of the fastest sharks known. [49] For ...
Otodus angustidens [3] is an extinct species of prehistoric megatoothed sharks in the genus Otodus, which lived during the Late Eocene and Miocene epochs about 34 to 21 million years ago. [4] The largest individuals were about 11–12 metres (36–39 ft) long. This shark is related to another extinct megatoothed shark, the famous Otodus ...
Carcharodon hubbelli, also known as Hubbell's white shark, is an extinct species of white shark that evolved between 8 and 5 million years ago during the Late Miocene to Early Pliocene epochs. This shark is a transitional species , showing intermediate features between the extant great white shark and the fossil white shark, C. hastalis .