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†Megalodon Sowerby, 1827 †Neomegalodon Guembel, 1864 †Pachyrisma †Protomegalodon †Pterocardia Bayan, 1874 †Quemocuomegalodon Yao et al. 2003 †Rhaetomegalodon †Triadomegalodon Vegh-Neubrandt, 1974 [2]
In 2020, Cooper and his colleagues reconstructed a 2D model of megalodon based on the dimensions of all the extant lamnid sharks and suggested that a 16 meters (52 ft) long megalodon would have had a 4.65 m (15.3 ft) long head, 1.41 m (4 ft 8 in) tall gill slits, a 1.62 m (5 ft 4 in) tall dorsal fin, 3.08 m (10 ft 1 in) long pectoral fins, and ...
Megalodon is an extinct genus of bivalve molluscs that reportedly lived from the Devonian to the Jurassic period. [1] It is not clear, however, that all the fossils assigned to Megalodon from that span of time really belong in the same genus. Jurassic relatives of Megalodon such as Pachyrisma grande were closely related to the rudists. [2]
The Lamniformes also include the extinct megalodon, Otodus megalodon. Orectolobiformes: They are commonly referred to as the carpet sharks, including zebra sharks, nurse sharks, wobbegongs, and the whale shark. Pristiophoriformes: These are the sawsharks, with an elongated, toothed snout that they use for slashing their prey.
The original hypothesis of the great white shark's origin held that it is a descendant of a lineage of mega-toothed sharks, and is closely related to the prehistoric megalodon. [29] [30] These sharks were considerably larger in size, with megalodon attaining an estimated length of up to 14.2–20.3 m (47–67 ft).
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Deep-sea chimaera photographed by the NOAAS Okeanos Explorer.Visible on its snout are tiny pores which lead to electroreceptor cells.. Chimaeras are soft-bodied, shark-like fish with bulky heads and long, tapered tails; measured from the tail, they can grow up to 150 cm (4.9 ft) in length.
The species megalodon (pictured), the largest shark ever, belongs to this group. [24] †Palaeocarchariidae (?) Palaeocarchariidae: 1 1 A Late Jurassic shark considered one of the closest relatives to the Lamniformes, alternately placed in its own order. †Pseudocoracidae: Pseudocoracidae: 2 7