North America, United States, Ohio, New York, & Indiana, Ordovician, Devonian, & Mississippian period, ca. 488.3 to 318 million years ago. This is a fascinating collection of fossils - 4 pieces containing 6 fossils total! The largest matrix is a gray slate that has part of a crinoid with the tendril-like tentacles clustered together, and a platyceras sea snail shell fragment. Crinoids and platyceras had a symbiotic relationship, the snails ate the fecal matter from the crinoids, although there is evidence that they may have been parasitic and bored directly into the crinoids' stomachs! The other matrix contains a partially enrolled trilobite (Flexicalymene meeki), and a snail shell from what is likely a Cyclonema. The other trilobite (Phacops rana) is also partially enrolled - a defensive position to protect the soft underbelly from predators, much like modern day pill bugs. The brachiopod is a beautiful specimen - the original external shell material was replaced by shimmering pyrite as it fossilized! Size of brachiopod: 2" L x 1" W (5.1 cm x 2.5 cm)
Provenance: ex-Stein collection, Bloomfield Hills, Michigan, USA, acquired prior to 2010
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#164167
Condition
The crinoid matrix is repaired from 3 large pieces with adhesive and stable fissures are visible on frontside. The crinoid has great details! The trilobite and snail matrix are well preserved and professionally prepared, and the trilobite is arranged and adhered to the matrix, and the snail is original to the formation. The other enrolled trilobite has excellent preservation to eye lobe texture. Brachiopod has chips to periphery of the shell and is not attached to any matrix. All have a paper label on the base of find site and species.