約5億5千年前のカンブリア紀、海中に生息し食物連鎖の頂点に立っていた捕食動物で体長50cm〜2m。既存の系統への分類が不可能な独特の動物門ですが、最初期の節足動物の系統発生の様子を推定するのに重要なのが、このアノマロカリスです。The Cambrian 50 to 200cm long The biggest animal of this generation and the most powerful predator stood at the top of the food chain. The ancestor to the arthropod. Their name originates from description of a detached arm; like creature due to its resemblance to the tail of lobsters or shrimps. Their name has the meaning of * an eccentric shrimp*. Canada Sea