Thread:Edaphosaurus/@comment-30261954-20180417194947

I can see where most people come from with the head, but this animal doesn't have a thumb (the tiny, almost not their finger I can't remember if on it is on theropods this late may have been one, but this is not the claw), the claw was on the first finger, why does everyone think it's a thumb when I can find no scientific source that calls it that? 