Yohoia sp.
Middle Cambrian
Marjum Formation
Marjum Pass, House Range, Millard County
Utah, USA.

Arthropods dominated Cambrian oceans, filling a wide range of ecological roles as predators, scavengers, and bottom dwellers. Fossils from the Marjum Formation are celebrated for their exceptional preservation, often retaining fine anatomical details that provide valuable insight into the early evolution of one of Earth’s most successful animal groups.

8mm arthropod on 65mm slab

This is exactly the same genus illustrated in: Morris, S. C., Selden, P. A., Gunther, G., Jamison, P. G., & Robison, R. A. (2015). New records of Burgess Shale-type taxa from the middle Cambrian of Utah. Journal of Paleontology, 89(3), 411-423.

An illustration from this paper is shown above.