Mean atmospheric O2
Geologic Time Scale
An anomalocaridid from the genus Anomalocaris cruises a Middle Cambrian ocean floor about 500 million years ago. Growing to over three feet long, Anomalocaris is believed to have been a predator whose diet included trilobites and may have been one of the earliest arthropods.
This image includes a trilobite from the species Olenoides serratus and sponges from the genus Vauxia and Wapkia. The small, flower-like animals (yes, like the sponges they are rooted animals) are from the genus Dinomischus. Above and behind the Anomalocaris is an ancient jellyfish.
|*AKA Ibexian, Ayusokkanian, Sakian, Aksayan|
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