Achatinella pupukanioe is a species of land snail, a gastropod in the family Achatinellidae. It is endemic to Hawaii.
The dextral shell is conic and solid. The shell has six whorls. The glossy color is a uniform white, or ivory yellow with a white sutural line or either of these tints with a burnt sienna band immediately above a wider and darker band. The suture is margined. The lip is not expanded and has a brownish edge; the internal rib is white, or sometimes the whole lip is pale-pink. The white columellar fold is rather strong and abrupt.
The height of the shell is 16.3 mm. The width of the shell is 9.7 mm.
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