Ixalerpeton

I was really thrilled when this critter was published, as it wasn't really possible to nail down the proportions of any lagerpetid before this. Obviously I wish there was more information about the hands and the snout, but seriously, this was an amazing addition to our knowledge of what Triassic near-dinosaurs looked like.

Also, this truly looks like an animal that could have bounded around on all fours just about as easily as it could move bipedally (remember that when moving quadrupedally it probably would have lowered the ankle and moved with the hindlimb in a for plantigrade posture). From critters pretty much like this we get both the bipedal marasuchus-like dinosauromorphs, and apparently more quadrupedal silesaurids.

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