fauna Many other fossil animals have been found, such as freshwater bivalves, gastropods, turtles, lizards such as Magnuviator, and champsosaurs. The multituberculate mammal Cimexomys has been found on Egg Mountain. The species Piksi barbarulna was described based on forelimb bones from the Two Medicine Formation; it was initially thought to be a bird, but subsequently it was reinterpreted as a pterosaur, likely a member of Ornithocheiroidea. Azhdarchoid pterosaurs are also known from the Two Medicine Formation, including a very large, yet-unnamed azhdarchid, the estimated wingspan of which was , and smaller Montanazhdarcho minor, a non-azhdarchid azhdarchoid. Insect and mammal burrows have also been discovered, as well as dinosaur coprolites. See also List of dinosaur-bearing rock formations List of fossil sites (with link directory) References Bibliography Dodson, P., C.A. Forster, and S.D. Sampson. 2004. Ceratopsidae in Weishampel, D.B., P. Dodson, and H. Osmolska (eds.) The Dinosauria. 2nd Edition, University of California Press. Trexler, D., 2001, Two Medicine Formation, Montana: geology and fauna: In: Mesozoic Vertebrate Life, edited by Tanke, D. H., and Carpenter, K., Indiana University Press, pp. 298–309. Varricchio, D. J. 2001. Late Cretaceous oviraptorosaur (Theropoda) dinosaurs from Montana. pp. 42–57 in D. H. Tanke and K. Carpenter (eds.), Mesozoic Vertebrate Life. Indiana University Press, Indianapolis, Indiana Geologic formations of Alberta Geologic formations of Montana Upper Cretaceous Series of North America Cretaceous Alberta Cretaceous Montana Campanian Stage Sandstone formations of Canada Sandstone formations of the United States Fluvial deposits Deltaic deposits Ichnofossiliferous formations Ooliferous formations Fossiliferous stratigraphic units of North America Paleontology in Alberta Paleontology in Montana Glacier National Park (U.S.)