A. atratus may refer to: Abacetus atratus, a ground beetle found in India and Sri Lanka Aellopus atratus, a seed bug found in Europe and western Asia Aleurotrachelus atratus, the palm-infesting whitefly, native to Brazil and invasive to many other tropic and subtropic countries Alloterocucus atratus, a prehistoric beetle Ameiva atratus, a synonym of Redonda ameiva, the Redonda ground dragon Atractus atratus, a snake found in Colombia Austrogomphus atratus, a synonym of Hemigomphus atratus, the black vicetail, a dragonfly found in Australia