Argalista nana is a species of small sea snail with calcareous opercula, a marine gastropod mollusk in the family Colloniidae.

A. nana reaches a width of 2.5mm and a height of 0.9mm.

[2][3][4] This marine species is endemic to New Zealand.

It is found from Three Kings Island to Northland.

This Colloniidae-related article is a stub.