Valvata tricarinata

Valvata tricarinata
shell of Valvata tricarinata
Conservation status
NE[1]
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Heterobranchia
informal group Lower Heterobranchia
Superfamily: Valvatoidea
Family: Valvatidae
Genus: Valvata
Species: V. tricarinata
Binomial name
Valvata tricarinata
Say, 1817

Valvata tricarinata, common name the three-ridge valvata or threeridge valvata, is a species of small freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Valvatidae, the valve snails.

Contents

Distribution

This species is distributed in the Northwest Atlantic Ocean and along the Gulf of Maine.

Shell description

It varies greatly in carinate conditions of the shell.[2]

Paleontology

Valvata tricarinata is abundant in nearly all lacustrine and fluviatile deposits in North America of the Pleistocene period. Fossil individuals are more variable than recent ones.[2] There were described eight forms or subspecies.[2]

References

This article incorporates public domain text from the reference [2].

  1. ^ IUCN (2008). 2008 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Downloaded on 20 November 2008.
  2. ^ a b c d Frank C. Baker. July 1921. New forms of Pleistocene molluks of Illinois. The Nautilus, volume 35, number 1, 22-24.

External links