oo very nicely done. got to love prehistoric creatures.

Well, the pinnae don't fossilize so it's debatable. I figured they were around doing a cooling period so the ears might be smaller to counteract frostbite, also, it emphasizes the massive size of the jaw-closing muscles.

Is the left front leg out of place? Really, I can't figure out what could possibly be wrong with this. It looks like such a good piece.

I did goof up with one detail, but I'll leave it to you guys to figure it out.

Is it the digitigrade feet. That could just be the angle playing tricks on me, though

That's actually an artifact of the gait - the one hind paw is supposed to be in the process of pushing off, not digi.

Ive seen these guys on a BBC documentary and theyre so peculiar looking. Awesome illustration. I cant see a thing wrong with it.

This is awesome! *_*

...tail too small?

Great drawing, though.

I was going to ask: so when will you be illustrating a book on cryptozoology? But then you mention the calender, that'll do ;D
You have rendered it out so well, it looks pro and thorough, that's why I suggested the book...
I can't guess errors either, maybe the eyes would face more to the front on a predator, or if it's old enough to not have developed modern day mammalian genitals that show on the outside. I am assuming ancient mammals were a bit more like marsupials there (but not as specialized yet).

These were placental mammals, they were actually slightly closer relatives of ungulates and basal whales than Carnivoria, but filled the same niches, so its naughty bits would probably be the same, more or less. The eyes were indeed further down on the skull and farther apart than modern carnivores.

Man, I'd love to do a whole book on crytpozoology, but I lack the energy and self-esteem needed to promote myself in the publishing industry. I figured a calendar would be nice and useful, at least.

Well you'd also need to spell cryptozoology right

I love this image. So very few people draw prehistoric mammals!

looks like my neighbors dog..................