Description
Rarely seen Elrathia marjumi from the hard limestones of the Drum Mountain Range in Utah. The specimen has excellent preservation, including the finely preserved tubule structures on the cephalon which were likely the trilobite’s vascular system. This species is youngest of the Elrathia species, with small spines at the top of the pygidium differentiating it from others in the genus., a more robust cephalic shield and is typically larger than other members of the genus. E. marjumi occurs in isolated layers in the Drum Mountain Range of Utah, just south of the more famous Thomas Range, home of significant topaz deposits.
Age: Middle Cambrian
Species Name: Elrathia marjumi
Order / Family: Ptychopariida / Alokistocaridae
Locality: Millard County, Utah
Formation: Wheeler Formation
