So I was wondering how one goes about determining if a species of trilobite had lateral flexibility. That is, could wiggle side to side. I’m aware this is a rare quality that you get in like those Olenellus boys, but can’t find how it’s determined to be a trait of the animal as opposed to geological warping. Is there a part of the morphology that gives it away? Or is it just from finding enough intact specimens that were frozen mid wiggle?