In Depth Nidimys is a genus of multituberculatan mammal that lived in North America during the late Cretaceous. Further Reading - Mammals from the St. Mary River Formation (Upper Cretaceous), Montana. - Journal of Vertebrate Paleontology 30(3):885-898. - J. P. Hunter, R. E. Heinrich & D. B. Weishampel - 2010.
In Depth Paressonodon is a genus of multituberculatan mammal that lived in the USA during the late Cretaceous. Further Reading - New Late Cretaceous mammals from northeastern Colorado with biochronologic and biogeographic implications. - Journal of Vertebrate Paleontology 30 (2): 499–520. - Gregory P. Wilson, Marieke Dechesne & Ingrid R. Anderson - 2010.