Ataenius erratus is a species of beetle of the family Scarabaeidae. It is found in the United States (Alabama, Florida, Georgia, Mississippi, North Carolina, Ohio, South Carolina, Texas).

Description Adults reach a length of about . They have an elongate, moderately shiny, piceous or reddish black body.

Life history Specimens have been collected on fruit of Ocotea catesbyana, on Solanum tuberosum, in debris of Pinus clausa, as well as in nests of Solenopsis geminata.

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