The great looking trilobite @Greg.Wood prepped and posted has raised questions for me.
Where did the hard, calcitic, exoskeleton end and the soft under body begin? How was this transition accomplished with a hard mineral?
In the below picture of Greg's bug, you will see the segments appear quite flexible.
I realize there has been some compression when it was buried, but if the exoskeleton is as rigid as presented in the literature, shouldn't it have broken off rather than bent? The circled area on the left shows a "rind" on the segment. Is this part harder than the rest of the segment? (circled area on the right)
Hope someone can point me to some literature. Thanks!
@piranha @Kane