Arion ater ruber

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Arion ater, the black slug (also known as black arion, European black slug, or large black slug), is a large terrestrial gastropod mollusk in the family Arionidae, the round back slugs. Many land slugs lack external shells, having a vestigial shell. Most slugs retain a remnant of their shell, which is usually internalized, unlike other terrestrial mollusks (such as snails) which have external shells.

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