Amphidromus atricallosus perakensis Fulton, 1901

    Dextral or sinistral. Most commonly yellow with wide white subsutural band. Less variation in shell shape than leucoxanthus. Usually tall and narrow with convex whorls. Almost never has a black growth stop varix whereas leucoxanthus almost always does. Parietal callus is white. Occurs over much of Malaya including the Province of Perak.