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  • What Was Leolepis? The Tiny Armoured Fish From Before Earth’s Biggest Extinction

    What Was Leolepis? The Tiny Armoured Fish From Before Earth’s Biggest Extinction

    Leolepis matogrossensis is a newly described 254-million-year-old ray-finned fish from Brazil. It was only about 15 centimetres long, carried tooth-like armour and lived beside a vast Permian lake shortly before the largest mass extinction in Earth’s history. The fossil is unusually complete for a South American fish of its age. It was found in reddish…