RARE Undescribed Arthropod, Sidneyia?, from Cambrian Utah

Phylum Arthropoda incertae sedis (Sidneyia?)

Geological Time: Upper Middle Cambrian

Size (25.4 mm = 1 inch): 20 mm long (outside curve) on a 75 mm by 50 mm and 95 mm by 50 mm matrix pair

Fossil Site: Weeks Formation, House Range, Millard County, Utah

Code: UB174

Price: $175.00

SidneyiaDescription: This unusual specimen shows an appendage from what must have been a fairly large arthropod. They have a strong resemblance to those thought to belong to Sidneyia, a large arthropod better known from the Burgess Shale (see: 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.).


Reference: 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.

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