Modocia typicalisClass Trilobita, Trilobites Order Ptychopariida, Superfamily Ptychoparioidea, Family Marjumiidae Geologic Time: Middle Cambrian Size (25.4 mm = 1 inch): Trilobite 28 mm long and 21 mm wide on a 72 mm by 83 mm matrix Fossil Site: Marjum Formation, House Range, Utah |
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