Qattara Depression
"J. naida" lived in the Qattara Depression around 19 million years ago, during the early Miocene. At that time the area, which is currently arid, was a tropical swamp. "Jaggermeryx" fossils have been found alongside those of catfish, turtles, and waterbirds, as well as six other species of anthracotheres and a number of crocodile coprolites.