Ataenius robustus, the saline prairie scarab beetle, is a species of aphodiine dung beetle in the family Scarabaeidae. It is found in the United States (Arkansas, Illinois, Iowa, Kansas, Missouri, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, Wisconsin).
Description Adults reach a length of about . They have an oblong-oval, convex, shining, carbon black body, with reddish legs.
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