This is a large, detailed, 4.8" long (if outstretched) Drotops trilobite quarried from Issoumour, Morocco. It's good size for this large phacopid species and has excellent shell detail including beautiful eye facet preservation.
A photo of the Drotops quarry at Issoumour, Morocco showing the hard limestone layers being worked.
A photo of the Drotops quarry at Issoumour, Morocco. The quarry following the horizon where this trilobites are found extends several kilometers around the mountain.
How a Drotops might be found in the field, with part of the tail exposed in the broken rock. It would then be prepared using airscribes and air abrasives a process that would likely take 20+ hours for a good specimen..