Trilobites
Order Ptychopariida Suborder Ptychopariina, Superfamily
Ptychoparioidea,
Family Marjumiidae
Geologic Age: Upper Middle Cambrian
Trilobite is 32 mm long
Marjum Formation, Drum Mountains, Utah
Remarks: Modocia laevinucha, a less common trilobite, also occurs in
the nearby Wheeler formation.
Also see: US Trilobites
