This Specimen has been sold.
This is a molt of the rare Wheeler Shale trilobite Altiocullus sp. often referred to as Alokistocare. It comes from the famous U-Dig quarry in the house range where thousands of Elrathia and Asaphiscus are mined. Only one Altiocullus is found for ever thousand (at least) or so Elrathia, making them a difficult trilobite to find. Despite being a molt this one has exceptional, dark black shell preservation and surface detail. It would be a great addition to any trilobite collection.