Trevor Dykes wrote:
There were some at up to fox sort of sizes. They could be termed small compared to twelve metre dinosaurs, but I think 'very small' would be overdoing (or underdoing) it. I'm about 1 metre 70 and capable of burrowing.
Among the larger latest Cretaceous mammals known are Didelphodon vorax ( http://home.arcor.de/ktdykes/stago.htm#didelphodon ) and Schowalteria clemensi( http://home.arcor.de/ktdykes/zalambda.htm#schowalteria ).