RARE Anomalocaris Oral Disk Fossil

from Utah's Wheeler Formation

Anomalocaris cf nathorsti

Kingdom Animalia, Phylum Arthropod stem group, Class Dinocaridida, Order Radiodonta, Family Anomalocarididae

Geological Time: Middle Cambrian

Size: Anomalocaris fossil is 35 mm across on a 125 mm by 65 mm matrix

Fossil Site: Upper Wheeler Shale, Millard County, Utah, USA

Fossil Code: STF28

Price: Sold

RARE Anomalocaris Oral Disk FossilDescription: This is a partial oral disc of the “Terror Of The Cambrian”, Anomalocaris. The members of this group of enigmatic creatures are known from Asia, Australia, Europe, and North America, and are thought Anomalocaris Illustration by many to be closely allied with the Arthropda, a position not held by all researchers. Several have been described from Utah, notably a 50 mm partial specimen of A nathorsti from the Marjum Formation, but they are far more rare than those from Chengjiang or the Burgess Shale. Many examples of Elrathia have been found with bite marks, most typically on the right side, which are thought to have been the result of an abortive attack by this Cambrian raider. Indeed, this specimen is overlain by an impression of a trilobite which may well have been its prey.

Also see a complete Anomalocaris fossil from the older Pioche Formation of Nevada.

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