A. bidentata may refer to:
Acacia bidentata, a whistling thorn Achyranthes bidentata, a medicinal plant Acontia bidentata, an owlet moth Acteocina bidentata, a deepsea snail Alucita bidentata, a many-plumed moth Antheua bidentata, a prominent moth Antichthonidris bidentata, a South American ant Aphrophila bidentata, a crane fly Austromontia bidentata, a South African harvestman