A Pensylvanian (Naco Group) horshoe crab (probably Euproops) found near Payson, Arizona.
This may
be the oldest such crab found in Arizona.
Click on images for full scale version.
![](images/tn_hcrab01.jpg)
Low magnification view of the whole piece split open.
![](images/tn_hcrab02-1.jpg)
A view of just the positive half.
![](images/tn_hcrab03.jpg)
50x view of the positive half taken with a 1.3 Mega pixel Celestron 44302 Digital Microscope.
![](images/tn_hcrab03neg.jpg)
50x view of the negative half taken with a 1.3 Mega pixel Celestron
44302 Digital Microscope.