''Valvata tricarinata'',
common name
In biology, a common name of a taxon or organism (also known as a vernacular name, English name, colloquial name, country name, popular name, or farmer's name) is a name that is based on the normal language of everyday life; and is often contrast ...
the three-ridge valvata or threeridge valvata, is a
species of small
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 ...
with a
gill 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 in the family
Valvatidae
''Valvatidae'', the valve snails, is a taxonomic family of very small freshwater snails with an operculum, aquatic gastropod mollusks.
Taxonomy
The family Valvatidae has no subfamilies (according to the taxonomy of the Gastropoda by Bouche ...
, the valve snails.
Distribution
This species occurs in North America.
Shell description
There is great variation in the degree of carination of the
shell.
Paleontology
''Valvata tricarinata'' is abundant in nearly all
lacustrine and
fluviatile
In geography and geology, fluvial processes are associated with rivers and streams and the deposits and landforms created by them. When the stream or rivers are associated with glaciers, ice sheets, or ice caps, the term glaciofluvial or fluvio ...
deposits in North America of the
Pleistocene period. The fossil shells are more variable than the Recent ones.
[Frank C. Baker. July 1921. ''New forms of Pleistocene molluks of Illinois'']
The Nautilus, volume 35
number 1
22
€“24. Eight forms or subspecies were described.
References
This article incorporates public domain text from the reference.
* Turgeon, D.D., et al. 1998. ''Common and scientific names of aquatic invertebrates of the United States and Canada''. American Fisheries Society Special Publication 26
External links
Valvatidae
Gastropods described in 1817
{{Valvatidae-stub