''Gyraulus rossmaessleri'' is a small
species
In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...
of
freshwater snail, an
aquatic pulmonate gastropod mollusk
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is es ...
in the family
Planorbidae, the
ram's horn snails.
Distribution
The distribution of this species is
Holarctic. It occurs in countries and islands including:
* Germany - critically endangered (''vom Aussterben bedroht'')
[Glöer P. & Meier-Brook C. (2003). ''Süsswassermollusken''. DJN, pp. 134, page 107, ]
Habitat
This small snail lives on water plants in freshwater.
Shell description
The shell is nearly planispiral in its coiling.
References
ross
Molluscs of Europe
{{Planorbidae-stub