Agnostus

Agnostus is a genus of trilobites that lived approximately 540 to 438 million years ago. The agnostids were small (some measuring only 6 millimeters), with two thoracic segments and a large tail. Agnostus were blind trilobites, with no fossils of the species found with eyes. They were likely benthic, living deep in the ocean where eyes would be us
Found on http://en.wikipedia.org/wiki/Agnostus

Agnostus

genus of trilobites (an extinct group of aquatic arthropods) found as fossils in rocks of Early Cambrian to Late Ordovician age (those deposited ... [1 related articles]
Found on http://www.britannica.com/eb/a-z/a/29
No exact match found