Here is an unusual US trilobite. This is Modocia brevispina from the House Range of Utah. This specimen was recently acquired from the DeRosear Collection. Although similar, this bug differs slightly from the more common Elrathia from Utah. The trilobite has nice shell detail, and good, natural color. The LARGE trilobite is nicely positioned on the natural matrix plate. This is an unusual type of Modocia from the DeRosear Collection (Number 58).