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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 ...
Cornu aspersum (previously Helix aspersa) – the common garden snail – in Israel Colonies of snails in Sicily. A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. Land snail is the common name for terrestrial gastropod mollusks that have shells (those without shells are ...
Because the shells of sea snails are strong and durable in many cases, as a group they are well represented in the fossil record. The shells of snails are complex and grow at different speeds. The speed of growth is affected by a few variables such as the temperature of the water, depth of the water, food present for the snail, as well as ...
Amphibola crenata is a curiosity, as it seems to represent a transitional state between marine and terrestrial gastropods. The mantle is employed as a lung, and therefore immersion of the animal in sea water is of secondary importance, and occurs for not more than an hour at each high tide.
The majority of basommatophorans have shells that are thin, translucent, and relatively colorless, and all five freshwater basommatophoran families lack an operculum. Chilinidae - small to medium-sized snails confined to temperate and cold South America. [9] About 15 species. [5] Latiidae - small limpet-like snails confined to New Zealand. [9]
The Thecosomata (lit. "case-body" [3]) have a shell, while the Gymnosomata ("naked body") do not. The two clades may or may not be sister taxa ; if not, their similarity (in that they are both pelagic, small, and transparent, and both groups swim using wing-like flaps ( parapodia ) which protrude from their bodies) may reflect convergent ...
The shape of the shell tapers to a point at both ends with a narrow oval- to crescent-shaped opening and a shortened axis of the spiral shell near the opening (truncated columella). The shell has a brownish pink color. The full-grown adult snail ranges in size from 7–10 cm in length. [4]
Otala lactea, known as the milk snail or Spanish snail, is a large, edible [3] species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk, in the family Helicidae, the typical snails. [4] Archaeological recovery at the Ancient Roman site of Volubilis, in Morocco, illustrates prehistoric exploitation of O. lactea by humans. [5]