A. dubia

A. dubia may refer to:
 * Amphisbaena dubia, L. Müller, 1924, a worm lizard species in the genus Amphisbaena

Synonyms

 * Alcippe dubia, a synonym for Schoeniparus dubia, the rusty-capped fulvetta, a bird species found in Bhutan, China, India and Laos
 * Amoeba dubia, a synonym for Polychaos dubium, a freshwater amoeboid
 * Anguillulina dubia, a synonym for Tylenchorhynchus dubius, a plant pathogenic nematode