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Five views of a shell of Pomacea paludosa. This species is the largest freshwater gastropod native to North America. [3]The shell is globose in shape. The whorls are wide, the spire is depressed, and the aperture is narrowly oval. [3]
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. This tiny snail previously inhabited a small group of thermal springs in the State of New Mexico, USA. Its ...
Gastropoda (previously known as univalves and sometimes spelled "Gasteropoda") are a major part of the phylum Mollusca, and are the most highly diversified class in the phylum, with 65,000 to 80,000 [3] [4] living snail and slug species.
Molluscicides (/ m ə ˈ l ʌ s k ɪ ˌ s aɪ d s,-ˈ l ʌ s-/) [1] [2] – also known as snail baits, snail pellets, or slug pellets – are pesticides against molluscs, which are usually used in agriculture or gardening, in order to control gastropod pests specifically slugs and snails which damage crops or other valued plants by feeding on them.
Univalve – Having the shell composed of a single piece, as a snail. [1] Varicose – Swollen or enlarged. [1] Vascular – Containing or made up of blood vessels. [1] Vermiform – Formed like a worm. [1] Ventral – The lower border or side. [1] Ventricose – Swollen or inflated on the ventral side. [1] Vibratile – Moving from side to ...
Turbinidae have a strong, thick calcareous operculum readily distinguishing them from the somewhat similar Trochidae or top snails, which have a corneous operculum. This strong operculum serves as a passive defensive structure against predators that try to enter by way of the aperture or that would break the shell at the outer lip.
Crepidula fornicata is a species of medium-sized sea snail, a marine gastropod mollusc in the family Calyptraeidae, the slipper snails and cup and saucer snails.It has many common names, including common slipper shell, common Atlantic slippersnail, boat shell, quarterdeck shell, fornicating slipper snail, Atlantic slipper limpet and it is in Britain as the "common slipper limpet".
The great majority of shelled gastropods or snails have a shell in one part, hence the older name "univalve". The gastropod operculum , when present, even when it is composed mostly of calcium carbonate , is not considered to be a valve.
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