Description
Elrathia kingii Trilobite
- Elrathia kingii
- Middle Cambrian Age
- Wheeler Shale
- Millard County, Utah
- This specimen measures 1.39″ long and is still in its natural matrix
- This specimen had not molted before being entombed in the sediments and fossilized. As a result, it retains its free cheeks
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This is the most familiar as well as the most abundant trilobite in North America. However, it occurs only in a few localities in Utah’s Middle Cambrian Wheeler Formation. In addition to this, these trilobites are roughly 500 million years old. .






