What do you see?

ICR recently posted the following to facebook.

Evolution necessarily implies the concept of "descent from a common ancestor or ancestors." But no ancestor-descendant relationship can be advocated with certainty based on the fossils. In fact, for every proposed transitional form, there is at least one evolutionist who has refuted it on scientific grounds.#PlanBehindTheHand #AmazingCreation

I'll bite. What evolutionist has disagreed that tree squirrels and ground hogs have a common ancestor? How about another, what evolutionist has refuted the assertion that Psittacosaurus is basal to Triceratops? Ken Ham asserts that they are part of the same "kind".