| Amnicola clarkei | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Amnicolidae |
| Genus: | Amnicola |
| Species: | A. clarkei |
| Binomial name | |
| Amnicola clarkei Pilsbry, 1917 | |
Amnicola clarkei is a species of very small freshwater snail which has an operculum, an aquatic prosobranch gastropod mollusc in the family Amnicolidae. [1]
The length of the shell attains 3.1 mm, its diameter 1.9 mm.
(Original description) The conical shell is narrowly umbilicate, with a slightly obtuse apex. It has a corneous, nearly smooth surface. The five whorls are highly convex, separated by a deep suture, and the body whorl is tubular. The aperture is distinctly oblique and almost circular, with the upper end rounded slightly more narrowly than the base. It projects only slightly beyond the preceding whorl laterally. The peristome is thin, continuous, and barely in contact with the preceding whorl above.
The operculum exhibits a relatively large spiral, with the nucleus located above the lower third. [2]
This species occurs at the Oneida Lake, New York, USA.
Amastra umbilicata was a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amnicola is a genus of very small freshwater snails which have an operculum. Amnicola species are aquatic prosobranch gastropod mollusks in the family Amnicolidae according to the taxonomy of the Gastropoda.
Clappia umbilicata, the umbilicate pebblesnail, was a species of small freshwater snail that had an operculum, an aquatic gastropod mollusk in the family Lithoglyphidae. This species is now extinct.
Neoplanorbis tantillus was a species of very small air-breathing freshwater snail, an aquatic gastropod mollusk in the family Planorbidae, the ram's horn snails. This species was endemic to the United States. In 2012, it was declared extinct by the IUCN Red List of Threatened Species.
Amnicolidae is a family of small freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the superfamily Rissooidea.
Anostoma octodentatum, common name Brazilian up-mouth snail, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Odontostomidae.
The Socorro springsnail, scientific name Pyrgulopsis neomexicana, is an endangered species of minute freshwater snail with a gill and an operculum, an aquatic gastropod mollusk or micromollusk in the family Hydrobiidae, the mud snails.
Lyogyrus walkeri, common name Canadian duskysnail, is a species of freshwater snail, an aquatic gastropod mollusk in the family Amnicolidae.
Fontigens aldrichi, common name the Missouri amnicola, is a species of freshwater snail, an aquatic gastropod mollusk in the family Fontigentidae.
Amnicola dalli, common name the peninsula amnicola, is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Amnicolidae.
Pyrgophorus spinosus, common name the spiny crownsnail, is a species of very small freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae.
Pyrgulopsis deserta is a species of freshwater snail in the family Hydrobiidae, the mud snails. It is known by the common names desert springsnail, Virgin springsnail, and St. George snail. It occurs in southwestern Utah and northwestern Arizona in the United States.
Lyogyrus is a genus of very small freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Amnicolidae.
Amnicola limosus, common name the mud amnicola, is a species of very small aquatic snail, an operculate gastropod mollusk in the family Amnicolidae
Marstonia comalensis is a species of minute freshwater snail with a gill and an operculum, an aquatic gastropod mollusk or micromollusk in the family Hydrobiidae. It is found in south central Texas, United States.
Potamolithus rushii is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Lithoglyphidae.
Aegista omma is a species of air-breathing land snails, a terrestrial pulmonate gastropod in the family Camaenidae.
Amastra pagodula is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Lyogyrus bakerianus is a species of very small freshwater snail which has an operculum, an aquatic prosobranch gastropod mollusc in the family Amnicolidae.
Marstonia lustrica is a species of very small freshwater snail which has an operculum, an aquatic prosobranch gastropod mollusc in the family Hydrobiidae.
This article incorporates text from this source, which is in the public domain .