What is "cimexomys"

Cimexomys is an extinct North American mammal that lived from the Upper Cretaceous to the Paleocene. For a while, it shared the world with dinosaurs, but outlived them. It was a member of the extinct order Multituberculata and lies within the suborder Cimolodonta. It is perhaps a member of the Paracimexomys group, though it's not certain.

The genus Cimexomys ("bug mouse") was named by Sloan and Van Valen in 1965. Most remains are restricted to teeth. "Cimex" means "bug", with reference to the type locality of Cimexomys minor in the Bug Creek Anthills in Montana, United States.

The inclusion of C. in the Paracimexomys group is tentative, (Kielan-Jaworowska & Hurum, 2001, p. 403). Some species are termed here as "Cimexomys", and they're listed towards the end. New species have previously been christened with great enthusiasm, and much reidentification has also occurred.