Nation Jurassic bug: Researchers find 151-million-year-old Morrisonnepa Jurassica insect fossil in Utah May 22, 2020USA TODAYComments Off on Jurassic bug: Researchers find 151-million-year-old Morrisonnepa Jurassica insect fossil in Utah Paleontologists in Utah discovered a 151-million-year-old fossil of a giant bug called Morrisonnepa Jurassica, related to "giant water bugs."