Anomalocaris Cambrian Predator Fossil

from Utah's Marjum Formation

Anomalocaris sp

Limb part and counterpart, Soft-bodied animal; a widely distributed Cambrian predator, and the largest animal from the Burgess Shale

Geologic Time: Middle Cambrian

Size: 35mm on 85mm

Fossil Site: Marjum Formation, Millard County, Utah

AnomalocarisAnomalocaris is the largest known Burgess Shale animal. Anomalocaris was widely distributed with other finds in Australia, China, Greenland and Utah. This Cambrian predator reached lengths of up to half a meter. Complete specimens are rare Anomalocarisbut the mouth parts are sometimes found in Lower Cambrian through lower Upper Cambrian horizons. Anomalocaris swam with a series of lobes along the sides of the body. In front it had large spiny limbs that it used for grabbing prey. The specimen below has one of these limbs. Even for Anomalocaris, this is a very large specimen. Elrathia kingii often have healed bite marks attributed to Anomalocaris. This specimen is a bit weathered, but still is a fine example of this unusual Cambrian animal from America's Burgess Shale-like stra in Utah.

Also see: Utah Cambrian Explosion Fossils

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