''Sadleriana fluminensis'' is a

freshwater snail Freshwater snails are gastropod mollusks which live in fresh water. There are many different families. They are found throughout the world in various habitats, ranging from ephemeral pools to the largest lakes, and from small seeps and springs ...

from the family Hydrobiidae.

Range

''Sadleriana fluminensis'' occurs in northern Italy, Slovenia, Croatia and Bosnia-Herzegovina. The now scattered occurrences can be interpreted as relics of a contiguous distribution during the last Ice Age, when the Adriatic Sea was partially dried up and the rivers had common lower reaches.

References

Hydrobiidae Gastropods described in 1853 {{Hydrobiidae-stub