This is the preview post #17 for the 2025 ESCONI Gem, Mineral, and Fossil Show Live Auction. The ESCONI Gem, Mineral, and Fossil Show for 2025 will be held on March 15th and 16th at the DuPage Fairgrounds in Wheaton, IL, which is the same location as last year. All details can be found here.
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We have a very rare Mazon Creek fossil to show you today. This is a Glaphurochiton concinnus, which is a mollusk, belonging to the same Phylum as oysters, clams, cephalopods, snails, and gastropods. They always have eight ornamented segments or valves. Glaphurochiton concinnus was one of the first animal described by Dr. Eugene Richardson, Jr. He named it Helminthochiton concinnus. It was later reassigned as Glaphurochiton in 1986. For more information, see Mazon Monday #175.
