Best Sinistral
The official state shell of Texas, designated in 1987, this Gulf and Atlantic coast whelk is among the few large gastropods with a naturally sinistral (left-coiling) shell.
The Plaited Door Snail is a European clausiliid land snail notable for its elongated, left-coiling shell and its complex defensive door mechanism.
Belonging to the door snail family, Laciniaria biplicata is a terrestrial gastropod found in Europe, distinguished by its complex internal shell structures.
The Tree Door Snail is a European land gastropod notable for its unusual left-coiling shell and its habit of living on the damp trunks of deciduous trees.
A freshwater gastropod originally native to North America that has naturalized on every continent except Antarctica, making it one of the world's most cosmopolitan freshwater snails.
A freshwater gastropod distributed across the Northern Hemisphere in temporary pools and marshes, recognized by its smooth, narrow, high-spired, dark-colored shell.
A small, sinistral (left-coiling) European clausiliid snail common in damp rocky outcrops and woodland, identified by two distinct folds inside its narrow aperture.
