Would these scientists describe three DIFFERENT species? Of course they would! And it would ALSO be ridiculous.
With skeletal material scientists tend to look at morphology, rather than size. Little things, like dental morphology, can tell you a lot. The position of the foramen magnum can provide good information on posture and locomotion.
Really, there is a lot of science involved in this. (I do skeletal analysis as part of my work as an archaeologist.)
> I do skeletal analysis as part of my work as an archaeologist.
Ah. So you admit to being a biased scientist, just out looking to grub up government grants! Your opinions should be ignored.
(...says the aerospace engineer working for a NASA contractor)