Heresy.
But you can't do an even-remotely realistic evolution mod in Civ-III, so I guess that's a way to do it. I'd strongly advise to do something along the lines : (a) choose a specific modern family and give that Civilization every related unit from the chosen ancestor to the modern final unit or (b) choose a specific extinct family and give that Civilization every descendant. Either way, that's a lot of work.By the way, I'm not planning such a mod, I'm not sure it would be fun to play, these are just a few thoughts on the subject.
methinks that if you would have the bison 3d object you could easily remix a lot of new animals like the extinct long horn bison, the ur, and so on on....i would have some need for a gaur (bos gaurus), the largest animal in the cow family, and the gaurus will fit very well in the asian mod made by shiro...maybe you spend some time with this...it would be formidable....
I'm not a modeler so I'm limited to what model I have and what tricks I can use to modify it. Some models are great for it, some can barely be animated anyway. I'm not planning any Bovinae. Tom might be more inclined to.
I'm not planning it. King Kong (even my 1933 version) wasn't animated like a real gorilla would move. I guess if someone really needs a Gorilla gorilla, it would make a good substitute. Anyone can resize it, with SBB or manually to a more suitable size - they've got my blessing.
oops, off topic again. 
