Contact: Robin Ann Smith
National Evolutionary Synthesis Center (NESCent)
Caption: This photograph of the fossilized teeth and upper jaw of Megapiranha paranensis shows intermediate tooth arrangement between single-rowed piranhas and their double-rowed relatives. The fossil measures about 3 inches in length.
Credit: Photo courtesy of Mark Sabaj-Pérez
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Related news release: New fossil tells how piranhas got their teeth