1.2" Spiny Ceratarges Trilobite - Zireg, Morocco
Nice preparation and a naturally, multi-toned shell coloration.
There are currently about 5 different species of Ceratarges described from Morocco each a slight variation on the others. A paper describing some of these species can be found at:
NEW SPECIES OF THE LICHID TRILOBITE CERATARGES FROM THE MIDDLE DEVONIAN IN MOROCCO