Zonitoides jaccetanicus

The shell is evenly horny-brownish, fragile and transparent, finely striated on the upper side, and early smooth on the lower side.^[5] The shell has 5 weakly convex whorls with pronounced suture.^[5] The upper side is flattened.^[5] The lower side is convex.^[5] The last whorl is not much wider than the penultimate whorl.^[5] The aperture is oblique. The apertural margin is straight.^[5] The umbilicus is relatively narrow.^[5]

The width of the shell is 4–5 mm (0.16–0.20 in).^[5] The height of the shell is 2.6–3.4 mm (0.10–0.13 in).^[5]

The shell is very much like that of Zonitoides arboreus, but slightly larger.^[5] There are however anatomical differences between the two species.^[5]

This article incorporates public domain text from the reference.^[5]

• Bank, R. A.; Neubert, E. (2017). Checklist of the land and freshwater Gastropoda of Europe. Last update: July 16, 2017

• Bourguignat, J.-R. (1870). Mollusques nouveaux, litigieux ou peu connus. Tome 2 (= "Onzième et douzième fascicules"): 1-55, pls 1-4 (1870). 11: 1-27, pls 1-2