''Caspia'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of marine snails, brackish water snails and

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 ...

s with a

gill A gill () is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are ...

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 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 e ...

in the family

Hydrobiidae Hydrobiidae, commonly known as mud snails, is a large cosmopolitan family of very small freshwater and brackish water snails with an operculum; they are in the order Littorinimorpha. Distribution Hydrobiidae are found in much of the world, ...

. ''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, marineKantor Yu I., Vinarski M. V., Schileyko A. A. & Sysoev A. V. (published online on March 2, 2010). "Catalogue of the continental mollusks of Russia and adjacent territories"
Version 2.3.1
/ref> *''

Caspia brotzkajae ''Caspia'' is a genus of marine snails, brackish water snails and freshwater snails 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 Pyrgu ...

'' Starobogatov in Anistratenko & Prisjazhnjuk, 1992 - marine *''

Caspia gaillardi ''Caspia'' is a genus of marine snails, brackish water snails and freshwater snails 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 Pyrgu ...

'' (Tadjalli-Pour, 1977) - marine *''

Caspia gmelinii ''Caspia'' is a genus of marine snails, brackish water snails and freshwater snails 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 Pyrgu ...

'' Clessin & W. Dybowski in W. Dybowski, 1888 - marine *''

Caspia knipowitchi ''Caspia'' is a genus of marine snails, brackish water snails and freshwater snails with a gill and an operculum (gastropod), operculum, an aquatic animal, aquatic gastropod mollusk in the family Hydrobiidae. ''Caspia'' is the type genus of the ...

'' Makarov, 1938 - marine and brackish *''

Caspia logvinenkoi ''Caspia'' is a genus of marine snails, brackish water snails and freshwater snails 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 Pyrgu ...

'' (Golikov & Starobogatov, 1966) - freshwater *''

Caspia makarovi ''Caspia'' is a genus of marine snails, brackish water snails and freshwater snails 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 Pyrgu ...

'' (Golikov & Starobogatov, 1966) - freshwater and brackish *''

Caspia pallasii ''Caspia'' is a genus of marine snails, brackish water snails and freshwater snails 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 Pyrgu ...

'' Clessin & W. Dybowski, 1887 *''

Caspia stanislavi ''Caspia'' is a genus of marine snails, brackish water snails and freshwater snails 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 Pyrgu ...

'' Alexenko & Starobogatov, 1987 - freshwater and brackish *''

Caspia valkanovi ''Caspia'' is a genus of marine snails, brackish water snails and freshwater snails 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 Pyrgu ...

'' (Golikov & Starobogatov, 1966)WoRMS (2011). ''Caspia valkanovi'' (Golikov & Starobogatov, 1966). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=576361 on 2011-07-14 ;Species brought into synonymy: *''Caspia issykkulensis'' Clessin, 1894: synonym of '' Pseudocaspia issykkulensis'' ( Clessin, 1894)

References

Hydrobiidae {{Hydrobiidae-stub