We usually have a limited number of professionally cleaned mountain beaver skulls for sale at any time. The upper and lower jaws may be separate or glued together. One average mountain beaver skull we measured was 2.75" long, 2.75" wide, and 1.75" high.
These are really large moles; they should not be confused with North American beavers. They are also called: Apolodontia, Boomers, Ground bears, Giant Moles, and Sewellel Beaver.
Mountain Beaver are not an endangered species. A USFWS export permit is required for all shipments outside of the U.S.