Description: These unusual Cambrian Explosion creatures have trilobitomorph features, and have as yet not been described in the literature. They are thought to have affinities with the Burgess Shale genus Emeraldella. What makes this one highly unusual is that there is not one but FOUR specimens preserved together, the first such example I have been able to offer. Any collector of Cambrian fossils from Utah would be pleased to add such an exceptional example.

Briggs D.E.G., and R.A. Robison. 1984. Exceptionally preserved non trilobite arthropods and Anomalocaris from the Middle Cambrian of Utah. University of Kansas Paleontological Contributions, Paper 111:1-24.