This is a SPECTACULAR example of a VERY RARE natural assemblage of Silurian life-forms from North America - namely from the famous Waldron Shale. Not only does this fossil feature a rare species of trilobite in remarkable preservation, Maurotarion christyi, but it shows a wide variety of other Silurian life-form fossils. Also shown on the rock occurring together naturally is a Calymene breviceps trilobite, enrolled on the edge of the rock, as well as a large fully inflated bryozoan colony, a part of a crinoid stem and a brachiopod. The Maurotarion trilobite is a rare species and this one is really a beautiful example. It is partially enrolled but the full head and portion of the body is laying on the top surface. The carapace of this trilobite is a stunning color combination of ivory white and blue-gray tones in the calcite. Each of the other life-form fossils are of varying in color making the whole piece a very attractive as well as educational example of these prehistoric creatures that can be readily identified from the differing natural hues. The Silurian Period Waldron Shale Formation in Indiana, U.S.A. is well known and has produced some fantastic fossil specimens highly desired by collectors and academia. This piece is a really impressive piece of some of the varieties of life from that era. The entire specimen has been professionally prepared of the highest skill with no damage to any of the fossils.