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meaning: "Big piranha"
Named By: Alberto Luis Cione, Wasila M, Dahdul, John G. Lundberg & Antonio MachadoinAllison in 2009
Time Period: Late Miocene
Location: Argentina
Size: Estimated up to 1 meter long
Diet: Uncertain, probably carnivorous, but teeth could have been used for a herbivorous diet
Fossil(s): Premaxillae teeth
Classification: | Chordata | Actinopterygii | Characiformes | Characidae | Serrasalminae |

Megapiranha paranensis or megapiranha is an extinct serrasalmid characin fish from the Late Miocene (8-10 million years ago) of Argentina, described in 2009. It is thought to have been about 71-128 centimetres (2.33-4.20 ft) in length. The holotype consists only of premaxillae and a zigzag tooth row; the rest of its body is unknown. This dentition is reminiscent of both the double-row seen in pacus, and the single row seen in the teeth of modern piranhas, suggesting that M. paranensis is a transitional form. Its bite force is estimated between 1,240-4,749 N (279-1,068 lbf).

Read more about Megapiranha at Wikipedia
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