Anomalocaris

Anomalocaris canadensis

Anomalocaris (from Ancient Greek ανώμαλος, meaning "unlike", and καρίς, meaning "shrimp", with the intended meaning "unlike other shrimp") is an extinct genus of radiodont, an order of early-diverging stem-group marine arthropods. It is best known from the type species A. canadensis, found in the Stephen Formation (particularly the Burgess Shale) of British Columbia, Canada