Alzoniella junqua is a species of very small aquatic snail, a spring snail, an operculate gastropod mollusc in the family Hydrobiidae.
Description.
The length of the shell varies between 1.4 mm and 1.8 mm, the diameter between 0.82 mm and 1 mm.
Distribution.
This species occurs in the Pyrénées-Atlantiques and Hérault, France.