The
shell is very small. The shell has 1.5
whorls. The
last whorl is inflated. The
aperture is oval and very large, like in
succineids, columellar and parietal sides of the margin thickened. The width of the shell is 1.5–3 mm. The height of the shell is 2–5 mm. The animal cannot withdraw entirely into the shell.
Otina ovata has no
tentacles. ==Habitat==