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Trilo-Related Gifts

Peronopsis Trilobite with Colorful Margaretia Algae
UTAH • OTHER TYPES
Stock Number TTUTP05
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Name:   Peronopsis interstrictus, Margaretia dorus
Age:  Middle Cambrian
Formation:  Wheeler Formation
Location:  Millard County, Utah
Size:  Plate is 5.2 inches tall
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Here is an extremely unusual fossil association. This is Margaretia dorus algae and a Peronopsis trilobite from the Cambrian of Utah. Margaretia was probably a thin, frond-like algae similar to modern kelp. The fronds are perforated by a network of small oval holes. This type of algae is also found in the famous Burgess Shale deposits of Canada. This specimen has many specimens preserved with very good detail. Under magnification, the perforations are easily seen. The fossils have breathtaking natural yellow-orange coloration and striking contrast. The algae is well showcased on the large plate of shale that also contains a complete Peronopsis trilobite . This is a great display example of this uncommon fossil association from Utah.