Giant Enrolled Phacops Trilobite (Replica) Triceratops (Late Jurassic 160-140 million years

(Late Jurassic 160-140 million years ago) These limestone beds are the result of a series of islands and shallow lagoons

Hemicyclaspis probably foraged the ocean floor for food

Archeological Periods and Cultures Chart

The greatest abundance of specimens

Giant Enrolled Phacops Trilobite (Replica) Triceratops (Late Jurassic 160-140 million yearsThis softball sized enrolled trilobite has very large eyes. Eyes that wrapped around to a point that Phacops could see almost 360 degrees. Eyes composed of uniquely rounded lenses instead of the standard trilobite hexagonal shape. Eyes that were and are Phacops' most distinguishing aspect. Because of these unique optical features, this most popular of trilobites could easily traverse the shallow Devonian seas that were it's home. Trilobites are very