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Even a few marine species have lungs. Snails can be found in a very wide range of environments, including ditches, deserts, and the abyssal depths of the sea. Although land snails may be more familiar to laymen, marine snails constitute the majority of snail species, and have much greater diversity and a greater biomass.
[11] [12] The total number of living species of freshwater snails is about 4,000. [13] Recently extinct species of gastropods (extinct since 1500) number 444, 18 species are now extinct in the wild (but still exist in captivity), and 69 species are "possibly extinct". [14] The number of prehistoric (fossil) species of gastropods is at least ...
The Neritimorpha are a group of primitive "prosobranch" gilled snails which have a shelly operculum.. Neritiliidae - 5 extant freshwater species [5]; Neritidae - largely confined to the tropics, also the rivers of Europe, family includes the marine "nerites". [9]
The grove snail, brown-lipped snail or lemon snail (Cepaea nemoralis) is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc. [3] It is one of the most common large species of land snail in Europe, and has been introduced to North America. Subspecies. Cepaea nemoralis etrusca (Rossmässler, 1835) [4]
The word "micromollusc" is used most often for marine shelled species, although a reasonable number of land and freshwater species are also small enough to qualify as micromolluscs: for example, the land snail family Punctidae and the majority of species in the freshwater bivalve genus Pisidium.
The largest living species is the Giant African Snail or Ghana Tiger Snail (Achatina achatina; Family Achatinidae), which can measure up to 30 cm. [13] [14] The largest land snails of non-tropical Eurasia are endemic Caucasian snails Helix buchi and Helix goderdziana from the south-eastern Black Sea area in Georgia and Turkey; diameter of the ...
Cerithidea decollata, common name the truncated mangrove snail, is a species of sea snail, a marine gastropod mollusc in the family Potamididae. [ 2 ] Description
Potamididae, common name potamidids (also known as horn snails or mudwhelks) are a family of small to large brackish water snails that live on mud flats, mangroves and similar habitats. [1] They are amphibious gastropod molluscs in the superfamily Cerithioidea .