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The mantle cavity is a central feature of molluscan biology. This cavity is formed by the mantle skirt, a double fold of mantle which encloses a water space. This space contains the mollusk's gills, anus, osphradium, nephridiopores, and gonopores. The mantle cavity functions as a respiratory chamber in most mollusks. In bivalves it is usually ...
This group includes land snails and land slugs. Loss of the shell has taken place many times in different groups that are not evolutionarily closely related, and land snails and slugs are most often treated together as a single group in specialized malacological literature. [2] [3] All terrestrial molluscs belong to the class Gastropoda.
Official measurements of this species vary; Kerney et al. (1983) [11] give a range of measurements of 6–9 cm (2.4–3.5 in). The body of a fixed (preserved) adult specimen was 7 cm (2.8 in) long with a mantle length of 3 cm (1.2 in). [10] Colour morphs of G. maculosus. Brown individuals are typically associated with woodlands; black ...
A slug on a wall in Kanagawa, Japan.. Slug, or land slug, is a common name for any apparently shell-less terrestrial gastropod mollusc.The word slug is also often used as part of the common name of any gastropod mollusc that has no shell, a very reduced shell, or only a small internal shell, particularly sea slugs and semi-slugs (this is in contrast to the common name snail, which applies to ...
The bivalve's two siphons are situated at the posterior edge of the mantle cavity. [11] There is an inhalant or incurrent siphon, and an exhalant or excurrent siphon. [12] The water is circulated by the action of the gills. Usually water enters the mantle cavity through the inhalant siphon, moves over the gills, and leaves through the exhalant ...
A micromollusc is a shelled mollusc which is extremely small, even at full adult size. The word is usually, but not exclusively, applied to marine molluscs, although in addition, numerous species of land snails and freshwater molluscs also reach adult size at very small dimensions.
The terrestrial Mollusca of Michigan. 27 pp. '"Ecology of Northern Michigan" —Anootated list of the molluscs of the Porcupine Mountains and Isle Royale, Michigan; pages 93-99; Walker B. & Ruthven A. G. 1906. nhp.nris.mt.gov: Montana; fieldguide.mt.go: Gastropoda fieldguide to Montana; carnegiemnh.org: Pennsylvania - land gastropods
The rear of the shell is spiralled, and the mantle, foot and tentacles are black. [5] The interior of the shell is pearly with pink and green iridescence. [4] The black abalone's shell length can reach a maximum of 20 cm (7.9 in), being typically 10–14 cm (3.9–5.5 in) long. [6] Anatomy of Haliotis cracherodii