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The first shark-like chondrichthyans appeared in the oceans 400 million years ago, [1] developing into the crown group of sharks by the Early Jurassic. [2] Listed below are extant species of shark. Sharks are spread across 512 described and 23 undescribed species in eight orders. The families and genera within the orders are listed in ...
Cretoxyrhina (/ krɪˌtɒksiˈrhaɪnə /; meaning 'Cretaceous sharp-nose') is an extinct genus of large mackerel shark that lived about 107 to 73 million years ago during the late Albian to late Campanian of the Late Cretaceous. The type species, C. mantelli, is more commonly referred to as the Ginsu shark, first popularized in reference to the ...
Megalodon. Otodus megalodon (/ ˈmɛɡələdɒn / MEG-əl-ə-don; meaning "big tooth"), commonly known as megalodon, is an extinct species of giant mackerel shark that lived approximately 23 to 3.6 million years ago (Mya), from the Early Miocene to the Early Pliocene epochs.
The most widely known species still surviving is the frilled shark, known as a living fossil, along with the Southern African frilled shark, found along coastal areas of South Africa. Several extinct species are known. †Crassodontidanidae †Crassodontidanidae: 4 8 Extinct: Hexanchidae: Cow sharks: 3 extant 5 extinct 5 extant 31 extinct
The use of sight probably varies with species and water conditions. The shark's field of vision can swap between monocular and stereoscopic at any time. [58] A micro-spectrophotometry study of 17 species of sharks found 10 had only rod photoreceptors and no cone cells in their retinas giving them good night vision while making them colorblind.
Otodontidae is an extinct family of sharks belonging to the order Lamniformes. Its members have been described as megatoothed sharks. [1][2] They lived from the Early Cretaceous to the Pliocene, and included genera such as Otodus, including the giant megalodon. [3] Recent studies of the newly described genus Megalolamna indicate that the ...
List of Saint Helena, Ascension and Tristan da Cunha animals extinct in the Holocene. List of Asian animals extinct in the Holocene. List of European species extinct in the Holocene. List of extinct animals of the British Isles. List of North American animals extinct in the Holocene. List of Antillian and Bermudan animals extinct in the Holocene.
Category: Extinct sharks. ... Prehistoric sharks (6 C, 7 P) This page was last edited on 9 December 2022, at 13:16 (UTC). Text is available under the ...