As a non-biologist, I kind-of suspect that article is supposed to be some kind of elaborate joke. It sounds convincing to me, but then again, so did Sokal (1996) to non-physicists; my gut feelings' prior probability for that claim is tiny (but probably tinier than rationally warranted; possibly, because it kind-of sounds like a parody of ancient astronaut hypotheses); and I can't find any mention of any mammal inter-order hybrids on Wikipedia.