1 1/2 Inch 3D Isotelus Trilobite

This is a nice 1 1/2 inch long Isotelus sp. trilobite from Ontario, Canada. It fairly 3D, free of most of the matrix and shows great surface detail. Check out the natural pitting preserved on the surface on the cephalon (head). There's a variety of possible interpretations of these pits including that they make have held sensory setae (hairs).