Silurian Dalmanites Trilobite and Lepidocoleus Armored Worm

Description: This trilobite is a member of the Order Phacopida, Family Dalmanitidae from the Silurian Clinton Group Rochester Formation deposits near Rochester, New York, known as Dalmanites limulurus. The species name is derived from perceived similarities in appearance to the modern-day horseshoe crab Limulus. It is well-positioned on its shale matrix display base, and is representative of a taxon not frequently offered in such a fine preservational state. The other specimen on the plate is the Machaeridian ( armored worm) Lepidocoleus sarlei. The Machaeridians are a group of enigmatic fossils known from the Ordovician to Middle Permian. Complete specimens are rare, and an association such is this is even more rare. This association plate is offered here at little more than the cost a large Dalmanites would bring today

Reference: Paleontology, Vol 44, Part 1, 2001, pp 113-130.