The first bilateral animal emerged during the Ordovician Period.Fossils of this organism were discovered in South Africa.

Name: The first bilateral animal emerged during the Ordovician Period.Fossils of this organism were discovered in South Africa.
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The first bilateral animals emerged earlier, during the Ediacaran Period, not the Ordovician. Fossils of early bilateral animals, such as Kimberella, date back to the Ediacaran Period, which predates the Ordovician.

The First Bilateral Animal Emerged During the Ordovician Period