Theodoxus meridionalis is a species of freshwater snail with a gill and an operculum. It is an aquatic gastropod mollusk in the family Neritidae, the nerites.
Distribution The distribution of this species includes Sicily (which is part of Italy), and north-western Tunisia.
The type locality is Syracuse, Sicily.Brown D. S. (1994). Freshwater Snails of Africa and their Medical Importance. Taylor & Francis. .
Description The shell is cone-shaped to half-egg-shaped, almost smooth and weakly shiny. The color is pale yellowish with dark red to blackish zigzag streaks.
Dimensions of the shell are 4–5 × 7–8 mm.
Ecology This small snail lives in cold running waters.
References This article incorporates public domain text from the reference"Species summary for Theodoxus meridionalis ". AnimalBase, last modified 30 July 2007, accessed 17 May 2011.