How many species have been identified as ultrasocial?

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The term "ultrasocial" is generally used to describe four specific species of animals: ants, termites, humans, and naked mole rats. They are characterized by having a highly organized and interdependent social structure, with division of labor and cooperation for the greater good of the group. While there may be other species that exhibit social behavior, these four are most commonly referred to as ultrasocial.

How Many Species Have Been Identified as Ultrasocial