''Caspia'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of marine snails, brackish water snails and

freshwater snail Freshwater snails are gastropod mollusks that 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 t ...

s with a

gill A gill () is a respiration organ, respiratory organ that many aquatic ecosystem, 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 r ...

and an operculum, an aquatic

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...

in the family Hydrobiidae. ''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'' 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 pallasii'' Clessin & W. Dybowski, 1887 *'' Caspia stanislavi'' Alexenko & Starobogatov, 1987 - freshwater and brackish *'' Caspia valkanovi'' (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