Elrathia kingii Trilobite Fossil Mass Mortality Plate 5" x 4.5"

Elrathia kingii trilobite mortality plate found in the Wheeler Shale, House Range, Millard County, Utah. This plate measures approximately 5" tall by 4.5" wide and 1 1/2" thick.  Stands on it's own.  Two whole Elrathia kingii trilobite molts and five completes with some trilobite partials can be seen on this mortality plate. This is called a "Mortality Plate" because it is a frozen snapshot of a Death Assemblage. Information card included. Trilobites (meaning "Three-Lobed"), first appeared in our oceans approximately 521 million years ago before Going extinct around 240 Million Years Ago.