Phacops Rana Trilobite Devonian Period, 417-354 million years B.P. A Phacops rana trilobite on a matrix; held in a white card collector's tray. 200 grams, 87 mm (201 grams total, 88 x 63 mm including tray) (3 1/2 in. (3 1/2 x 2 1/2 in.)). Atlas Mountains, Hamar Laghdad formation, Pragian, (Alnif), Morocco, North Africa. Old Oxfordshire fossil and mineral collection. [No Reserve]