A. concinna may refer to:
Acacia concinna, a climbing shrub Acontista concinna, an Ecuadorian praying mantis Aegialia concinna, a beetle endemic to the United States Aiphanes concinna, an American spiny palm Alcadia concinna, a land snail Amalda concinna, a sea snail Ampelocissus concinna, an Angolan climbing vine Amphiura concinna, a brittle star Anatoma concinna, a sea snail Antennulariella concinna, a sac fungus Anathallis concinna, a flowering plant Areca concinna, a flowering plant Argia concinna, a pond damselfly