Emeraldella Basal Arthropod from Utah
to Burgess Shale"
Arthropoda (Basal), Emeraldellida,
Time: Upper Middle Cambrian
mm long by 9 mm wide
Site: Weeks Formation, Millard County, Utah
This unusual specimen has trilobitomorph features, and has as yet
not been described in the literature. It is thought to have affinities
with the Burgess
Shale genus Emeraldella, and is quite detailed. Notice that the
pointed telson is present, as well as traces of the right antenna.
This animal is exceedingly rare.
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.
See: Utah Cambrian Explosion