Mallon with Skull (IMAGE) Canadian Museum of Nature Caption Dr. Jordan Mallon with the reconstructed skull of Spiclypeus shipporum, a newly described genus and species of horned dinosaur. The fossil comes from the Judith River Formation in Montana and dates to about 76 million years ago. Credit Martin Lipman © Canadian Museum of Nature Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.