Does anyone know for sure the name, location and formation name for those large inexpensive Moroccan trilos you see for sale everywhere.. the name I have is Diacalymene ouzregui but I have also seen Flexicalymene ouzregui.. and the location is either near Erfoud, Tazoulait, and/or Alnif, Anti-Atlas Mnts. And I'm not sure what part of the Ordovician they are from - upper, middle, lower..? All too confusing. I suppose I could sort it all out if I knew the area better but I don't and it's hard to f