Large Modocia Weeks Trilobite

Modocia weeksensis

Trilobites Order Ptychopariida; Family Marjumiidae

Geological Time: Upper Middle Cambrian

Size (25.4mm=1 inch): Modocia: 28 mm long by 22 mm across on a 58 mm by 40 mm matrix

Fossil Site: Weeks Formation, Millard County, Utah

Modocia weeksensisDescription: This plaque displays a complete example of a trilobite of the Order Ptychopariida, known as Modocia weeksensis. It is easy to see where the species derives its name. They are typically found missing the genals, and as such are mostly molts. It is a large, well-inflated example that would make a welcome addition to any trilobite collection.

click trilobite pictures to enlarge

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