The families of British non-marine molluscs (slugs, snails and mussels)

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L. Watson and M. J. Dallwitz

Implicit Attributes

Unless indicated otherwise, the following attributes are implicit throughout the descriptions, except where the characters concerned are inapplicable.

Morphology. Not slender and worm-like when extended. Eyes present. The jaw not as in Zonitidae and Limacidae. The mantle not extending over the shell.

The shell not bent, the margin opposite the hinge outwardly curved. The shell more or less symmetrical about its vertical axis. The whorls neither shouldered nor keeled; without spines; not conspicuously transversely ridged. The shell not markedly striated across the whorls.

General biology, ecology. Breathing air directly via the lung-like mantle cavity. Not principally carnivorous. Lifestyle not subterranean.

Oviparous. Courtship not involving ‘love darts’.


To view the illustrations with detailed captions, go to the interactive key. This also offers full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa.

Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2005 onwards. The families of British non-marine molluscs (slugs, snails and mussels). Version: 4th January 2012. http://delta-intkey.com’.

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