Caspia
Encyclopedia
Caspia is a genus
of marine snails, brackish water snails and freshwater snail
s with a gill
and an operculum
, an aquatic
gastropod mollusk in the family Hydrobiidae
. Caspia is the type genus of the Caspiidae, that is a synonym of Pyrgulinae.
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
of marine snails, brackish water snails and freshwater snail
Freshwater snail
A freshwater snail is one kind of freshwater mollusc, the other kind being freshwater clams and mussels, i.e. freshwater bivalves. Specifically a freshwater snail is a gastropod that lives in a watery non-marine habitat. The majority of freshwater gastropods have a shell, with very few exceptions....
s with a gill
Gill
A gill is a respiratory organ found in many aquatic organisms that extracts dissolved oxygen from water, afterward excreting carbon dioxide. The gills of some species such as hermit crabs have adapted to allow respiration on land provided they are kept moist...
and an operculum
Operculum (gastropod)
The operculum, meaning little lid, is a corneous or calcareous anatomical structure which exists in many groups of sea snails and freshwater snails, and also in a few groups of land snails...
, an aquatic
Aquatic animal
An aquatic animal is an animal, either vertebrate or invertebrate, which lives in water for most or all of its life. It may breathe air or extract its oxygen from that dissolved in water through specialised organs called gills, or directly through its skin. Natural environments and the animals that...
gastropod mollusk in the family Hydrobiidae
Hydrobiidae
Hydrobiidae, common name mud snails, is a large cosmopolitan taxonomic family of very small freshwater snails and brackish water snails that have an operculum, aquatic gastropod mollusks in the clade Littorinimorpha.- Distribution :...
. Caspia is the type genus of the Caspiidae, that is a synonym of Pyrgulinae.
Species
Species within the genus Caspia include:- Caspia baerii Clessin & W. Dybowski in W. Dybowski, 1888 - type species, marine
- Caspia brotzkajae Starobogatov in Anistratenko & Prisjazhnjuk, 1992 - marine
- Caspia gaillardi (Tadjalli-Pour, 1977) - marine
- Caspia gmelinii Clessin & W. Dybowski in W. Dybowski, 1888 - marine
- Caspia knipowitchi Makarov, 1938 - marine and brackish
- Caspia logvinenkoi (Golikov & Starobogatov, 1966) - freshwater
- Caspia makarovi (Golikov & Starobogatov, 1966) - freshwater and brackish
- Caspia stanislavi Alexenko & Starobogatov, 1987 - freshwater and brackish
- Caspia valkanovi (Golikov & Starobogatov, 1966)