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The Conversation
The Conversation
Paul C. Sereno, Professor of Paleontology, University of Chicago

Paleontologists uncover a new ‘Spinosaurus’ species by following a clue from a decades-old book into the Sahara Desert

In this illustration, _Spinosaurus mirabilis_ fight over a carcass some 95 million years ago in what is now the Sahara Desert in Niger. Dani Navarro

My fixation on a small, desolate locale in the heart of the Sahara Desert started with a single line buried in a 630-page tome in French about the rocks of the central Sahara: “Dent de Carcharodontosaurus saharicus Depéret,” which translates to “tooth of Carcharodontosaurus saharicus Depéret” – “Depéret” refers to the scientist who originally named the species.

The intrepid French geologist Hugues Faure (1928-2003) had collected one saber-shaped tooth in the early 1950s at a small exposure he labeled “Akarazeras” on one of his maps, identifying the tooth as belonging to the T. rex-size predator Carcharodontosaurus. That beast was named years before based on fossils in the Western Desert of Egypt, and Faure correctly figured the tooth and outcrop in Niger might be the same age. Faure’s tooth, unfortunately, was never figured or photographed and has been lost.

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