Phacops Speculator Fossil Trilobite Devonian Period, 385-359 million years B.P. A Phacops speculator trilobite on a matrix; held in a white card collector's tray. 126 grams, 68 mm height (133 grams total, 76 x 53 mm including tray) (2 2/3 in. (3 x 2 in.)). Atlas Mountains, Hamar Laghdad Formation, Pragian, (Alnif), Morocco, North Africa. Old Oxfordshire fossil and mineral collection. [No Reserve]