THE Spanish Oceanography Institute has discovered a large deposit of fossils of the largest marine predator that ever existed, the megalodon, a shark that became extinct two million years ago.
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The deposit was found at the foot of an undersea mountain some 2,000 metres deep in waters off the Canary Islands during an ocean research campaign, the IEO said on Monday in a communique.
Those responsible for the discovery call this 'an event of great scientific significance'.
These fossils 'show that the biggest marine predator of all time lived, hunted and reproduced in these waters during that era', a shark that grew to be 20 metres long and weigh 100 tonnes.
For the kind of teeth it possessed, scientists think it fed on large prey like whales, dolphins, seals and other marine mammals, as well as on large fish and turtles.
Originally published asFossils of prehistoric giant shark found
Prehistoric fish are early fish that are known only from fossil records. They are the earliest known vertebrates, and include the first and extinct fish that lived through the Cambrian to the Quaternary. The study of prehistoric fish is called paleoichthyology. A few living forms, such as the coelacanth are also referred to as prehistoric fish, or even living fossils, due to their current rarity and similarity to extinct forms. Fish which have become recently extinct are not usually referred to as prehistoric fish.
Categories of prehistoric fish[edit]
Groups of various prehistoric fishes include:
Jawless fish[edit]
Placoderms[edit]
Acanthodians[edit]
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Cartilaginous fish[edit]
Basal ray-finned fish[edit]
Modern ray-finned fish (Teleosts)[edit]
Lobe-finned fish[edit]
See also[edit]
References[edit]
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- ^Shu, D-G., Conway Morris, S., Han, J.; et al. (January 2003). 'Head and backbone of the Early Cambrian vertebrate Haikouichthys'. Nature. 421 (6922): 526–529. Bibcode:2003Natur.421..526S. doi:10.1038/nature01264. PMID12556891.CS1 maint: multiple names: authors list (link)
Other reading[edit]
- Janvier, Philippe (1998) Early Vertebrates, Oxford, New York: Oxford University Press. ISBN0-19-854047-7
- Long, John A. (1996) The Rise of Fishes: 500 Million Years of Evolution, Baltimore: The Johns Hopkins University Press. ISBN0-8018-5438-5
External links[edit]
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