Taxon classification Animalia Stylommatophora Plectopylidae

Gudeodiscus (Gudeodiscus) messageri (Gude, 1909)

Diagnosis.

Shell small to medium-sized, with slightly elevated spire, dorsal surface somewhat domed; aperture almost circular, apertural fold missing; callus rather blunt and only slightly curved. Parietal wall with two lamellae (the anterior lamella may be dissolved into small denticles); lower parietal plica free or connected to the anterior lamella; palatal plicae oblique, or depressed Z-shaped, usually in contact with each other.

Differential diagnosis.

See under the two subspecies.