Spence Shale Amecephalus Trilobite and Eocrinoid Association

Description: This well preserved Amecephalus idahoensis is normally associated with the Spence Shale of Northern Utah. It’s a robust looking Ptychopariiad. The trilobite is about 98% complete. The only flaws are a bit of “skin” missing on the upper center right librigena, and a bit of shell overlying the 6th and 7th axial rings. Fossil association plates are always interesting. Here we find three unidentified Gogia specimens lying in close proximity to the Amecephalus on this spacious plate.

This fossil comes from the George Lee Collection of Southern California. Mr. Lee accumulated a virtual warehouse of fossils over thirty-five years of self-collecting and purchasing. Most of the fossils were acquired during the 1960s through the mid 1990s. Unfortunately, for we collectors, many of these sites and areas are no longer available for collecting. Therefore, many of my offerings are of special importance, as they are now rarely available to the public. Since Mr. Lee’s death, a few years ago, the collection has slowly been liquidated. This fossil came from one of the last available batches sold