Mammals are unusual because we don't have ribs in the rear portion of our body, but dinosaurs had ribs all the way to the pelvis.

哺乳动物很不寻常，因为我们身体的后部没有肋骨，但恐龙的肋骨一直延伸到骨盆。

So if all we find of a ceratopsian skeleton is the rear portion of it, we would not be able to confidentially say if it could be the holotype for a new species.

因此，如果我们发现的角龙骨架只是它的后部，我们就无法保密地说它是否可能是一个新物种的全标本。