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Portal:Gastropods/Selected picture/1 . The sculpture of this shell of Epitonium scalare is raised vertical ribs which are known as costae.Costae are a common feature in the shells of many species within the genus Epitonium, generally known as wentletraps (a word derived from the Dutch word for spiral staircase).
Gastropods are found in a wide range of aquatic and terrestrial habitats, from deep ocean trenches to deserts. Some of the more familiar and better-known gastropods are terrestrial gastropods (the land snails and slugs). Some live in fresh water, but most named species of gastropods live in a marine environment.
Freshwater snails are gastropod mollusks that 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 to major rivers. The great majority of freshwater gastropods have a shell, with very few
Haeckel (left), 1866 Sea snail shells, Kunstformen der Natur, 1904. Ernst Heinrich Philipp August Haeckel (February 16, 1834 – August 9, 1919), also written von Haeckel, was an eminent German biologist, naturalist, philosopher, physician, professor and artist who discovered, described and named thousands of new species, mapped a genealogical tree relating all life forms, and coined many ...
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. Numerous kinds of snail can also be found in fresh water.
The transitional zone, where these gastropods were found, is about 1–2 m (3–7 ft) in width, with temperature of 2–10 °C. [32] The preferred water temperature for this species is about 5 °C. [33] These snails live in an environment which has high concentrations of hydrogen sulfide, and low concentrations of oxygen. [33]
A number of species of non-marine molluscs are found in the wild in Montana. Gastropods. There at least 155 species of gastropods found in Montana. [1] Some of these species are exotics (not native to Montana) [2] and some species have been designated as Species of Concern. [3] Freshwater bivalves
This species constitutes one of the three predominant freshwater snails found in Chinese markets. [19] This snail is extensively used as part of the human diet in most places in China because the meat of the snail is considered delicious, being rich in nutrition, with a high content of protein and low fat content. [7]