''Aphaostracon'' 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 very small or minute

freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does include ...

and

brackish water Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estua ...

snail A snail is, in loose terms, a shelled gastropod. The name is most often applied to land snails, terrestrial pulmonate gastropod molluscs. However, the common name ''snail'' is also used for most of the members of the molluscan class Gastro ...

s that have an operculum, aquatic operculate

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 ...

s in the family

Cochliopidae Cochliopidae is a family of small freshwater snails with gills and an operculum, aquatic gastropod mollusks. Paludestrina d'Orbigny, 1840 is an archaic synonym, and has been placed on the Official Index of Rejected and Invalid Names by ICZN ...

.Bouchet, P. (2014). Aphaostracon F. G. Thompson, 1968. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php/aphia.php?p=taxdetails&id=729790 on 2014-11-16

Species

This genus includes the following species: *'' Aphaostracon asthenes'' F. G. Thompson, 1968 *'' Aphaostracon chalarogyrus'' F. G. Thompson, 1968 *'' Aphaostracon hypohyalinus'' F. G. Thompson, 1968 *'' Aphaostracon monas'' (

Pilsbry Henry Augustus Pilsbry (7 December 1862 – 26 October 1957) was an American biologist, malacologist and carcinologist, among other areas of study. He was a dominant presence in many fields of invertebrate taxonomy for the better part of a centu ...

, 1899) *'' Aphaostracon pachynotus'' F. G. Thompson, 1968 *'' Aphaostracon pycnus'' F. G. Thompson, 1968 *'' Aphaostracon rhadinus'' F. G. Thompson, 1968 *'' Aphaostracon theiocrenetus'' F. G. Thompson, 1968 *'' Aphaostracon xynoelictum'' F. G. Thompson, 1968

References

* Hershler R. & Thompson F.G. (1992) ''A review of the aquatic gastropod subfamily Cochliopinae (Prosobranchia: Hydrobiidae).'' Malacological Review suppl. 5: 1-140. Cochliopidae Taxonomy articles created by Polbot {{Cochliopidae-stub