Trilobites
Order Ptychopariida Suborder Ptychopariina, Superfamily
Ptychoparioidea,
Family Marjumiidae
Geologic Age: Upper Middle Cambrian
Trilobite is 26 mm long
Marjum Formation, Drum Mountains, Utah
Remarks: Note the Opisthoparian
facial sutures,
a typical characteristic of the Ptychopariids.
Also see: US Trilobites
