Trilobites crawled along the bottom of shallow seas for around 300 million years, from the beginning of the Cambrian Period to the end of the Permian Period. The name “trilobite” means “three lobes.” They were an ancient kind of arthropod, the group that includes insects, spiders, and crustaceans.
Greenops boothi is a trilobite found in the Devonian Period marine rocks of Southern Ontario, Quebec and New York State. This version is playfully colored green, but in fact Greenops is named after the 19th century paleontologist Jacob Green.