Scientists have solved the mystery of what Anomalocaris canadensis, an extinct apex predator, may have eaten.
Around 500 million years ago, an apex predator no larger than a house cat terrorized the seas in search of prey to puncture with its spiky facial appendages.
"There had been a long-standing question about what was causing the injuries we were seeing on Cambrian trilobites [in the fossil record of Canada's well-preserved Burgess Shale]," lead author Russell Bicknell, a postdoctoral researcher at the American Museum of Natural History in New York City, told Live Science."It had been hypothesized that A. canadensis was possibly one of the animals that was causing the damage by using its spiky appendages to grab and pierce its prey.
The team concluded that, while A. canadensis might have been adept at grabbing animals, the animal's two facial appendages would've been too delicate to actually pierce through trilobites' tough exoskeletons, which Bicknell said would have"possibly been made up of a similar chemical composition as the cuticle of a horseshoe crab's exoskeleton."
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