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Only a single species, G. cuvier, the tiger shark, is extant. [1] The earliest fossils date back to the early Eocene epoch, , around 56–47.8 Million years ago. [2] While historically considered a member of the requiem shark family Carcharhinidae, it is currently considered to be the only member of the family Galeocerdonidae. [3]
End Ordovician: 440 million years ago, 86% of all species lost, including graptolites; Late Devonian: 375 million years ago, 75% of species lost, including most trilobites; End Permian, The Great Dying: 251 million years ago, 96% of species lost, including tabulate corals, and most trees and synapsids
The oldest total-group chondrichthyans, known as acanthodians or "spiny sharks", appeared during the Early Silurian, around 439 million years ago. [13] The oldest confirmed members of Elasmobranchii sensu lato (the group containing all cartilaginous fish more closely related to modern sharks and rays than to chimaeras) appeared during the ...
The shark is believed to be an ancestor of the great white shark. ... Peruvian paleontologists in November presented the fossil of a young crocodile that lived more than 10 million years ago off ...
The two recently identified shark species were up to 12 feet long and once lurked in what is now Kentucky. Teeth in walls of Kentucky cave belong to sharks that lurked 325 million years ago Skip ...
The pyrite that fossilized the specimen, named Lomankus edgecombei, "preserves critical evidence of the evolution of life in the oceans 450 million years ago," co-author Derek Briggs said in a ...
The Late Ordovician mass extinction (LOME), sometimes known as the end-Ordovician mass extinction or the Ordovician-Silurian extinction, is the first of the "big five" major mass extinction events in Earth's history, occurring roughly 445 million years ago (Ma). [1]
Get excited for the 35th official Shark Week, from July 23 to July 29, with these shark facts. Sharks are millions of years older than dinosaurs and 5 other facts that may surprise you Skip to ...