Ataenius languidus is a species of beetle of the family Scarabaeidae. It is found in the United States (Alabama, Florida, Texas), the Bahamas, Costa Rica, Guatemala, Honduras, Mexico (Chiapas, Durango, Guerrero, Jalisco, Nuevo León, Oaxaca, Sinaloa, Tamaulipas, Veracruz), Nicaragua, Venezuela and the West Indies.
Description Adults reach a length of about . They have an oblong, moderately elongate, medially convex, shining, dark reddish brown to piceous body. The legs are usually reddish brown and the antennae are pale yellow.
Life history Specimens have occasionally been found in cattle dung.
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