This is a very interesting fossil. This is a colorful Hyolithes cecrops from the Middle Cambrian of Utah. These organisms have remained an enigma since the beginning of modern scientific description. Authorities are unsure of where they belong in a classification of the invertebrates. They may be related to mollusks, but in a separate phylum. Hyolithids have also been found in the famous Burgess Shale. This large specimen is nicely preserved and exhibits fine detail. The conical shape of the organisms is beautifully displayed, and the textured pattern is quite evident. The fossil has great color and contrast and is well presented on the natural plate of shale. This is a very colorful example of this problematic fossil.