This is a beautiful specimen of Isotelus from the Ordovician of Ontario, Canada. This Isotelus gigas (not the more common I. mafritzi) was recently acquired from the DeRosear Collection, where Doug had it in a place of prominence for many years. This outstretched trilobite is wonderfully articulated and almost perfectly prone. The bug exhibits very fine detail - even the small, crescent-shaped eyes are ORIGINAL and easily seen. The thick-shelled exoskeleton is beautifully preserved and contrasts strikingly with the lighter-colored matrix. The trilobite is almost perfectly centered on the rectangular block of limestone. And it is one of the most inflated and 3-D examples of this type we have seen. This is a museum quality example of an Isotelus gigas from Ontario - a true collection piece.