''Theodoxus euxinus'' is a species of small

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 ...

with a gill and an operculum, an aquatic

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk in the family Neritidae, the nerites.

Distribution

The distribution of this species includes: * Ukraine * Romania * Greece The

type locality Type locality may refer to: * Type locality (biology) * Type locality (geology) See also * Local (disambiguation) * Locality (disambiguation) {{disambiguation ...

Dobrogea Dobruja or Dobrudja (; bg, Добруджа, Dobrudzha or ''Dobrudža''; ro, Dobrogea, or ; tr, Dobruca) is a historical region in the Balkans that has been divided since the 19th century between the territories of Bulgaria and Romania. I ...

, Romania.

Description

The shell is shiny, smooth, with a coarse white ziczac pattern. The width of the shell is 6–8 mm.

Ecology

This species occurs in woodlands of the

Danube Delta The Danube Delta ( ro, Delta Dunării, ; uk, Дельта Дунаю, Deľta Dunaju, ) is the second largest river delta in Europe, after the Volga Delta, and is the best preserved on the continent. The greater part of the Danube Delta lies in Ro ...

region, on rocks, and on sandy or muddy

substrate Substrate may refer to: Physical layers *Substrate (biology), the natural environment in which an organism lives, or the surface or medium on which an organism grows or is attached ** Substrate (locomotion), the surface over which an organism lo ...

References

This article incorporates public domain text from the reference"Species summary for ''Theodoxus euxinus''"
AnimalBase, last modified 28 August 2010, accessed 13 April 2011. {{Taxonbar, from=Q7782194 Neritidae Molluscs of Europe Gastropods described in 1886