Powell described the species as follows: Shell minute, elongate-oval, semi-transparent, white, polished, thin and fragile.

Apart from very faint obliquely retractive growth striae there is no sculpture, the surface of all whorls being smooth and glossy.

Peristome continuous, dilated slightly over the basal and columellar portions and adnate across parietal wall as a distinct connecting callus.

[3] The species is similar in appearance to Pupatonia mimitula, but differs by having a narrower spire, and by having a smooth and polished texture.

[1] The holotype and four paratypes were collected by either Powell himself or by C. A. Fleming in February 1933, from a depth of 18 metres off Owenga Beach in the Chatham Islands.