Taxonomy of the Gastropoda (Ponder & Lindberg, 1997)
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The taxonomy of the Gastropoda, as revised by Winston Ponder and David R. Lindberg in 1997, is an older taxonomy of the class Gastropoda, the class of molluscs consisting of all snails and slugs. The full name of the work in which this taxonomy was published is Towards a phylogeny of gastropod molluscs: an analysis using morphological characters.
Live limpets in the intertidal zone in Cornwall, England.
The shell of an archaeogastropod from the Pliocene of Cyprus. A serpulid worm is attached.
Cochlodina laminata from the family Clausiliidae or door snails, a small land pulmonate which has a sinistral or left-handed shell, on the trunk of a tree, in woodland, England
Orthogastropoda
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Orthogastropoda was a major taxonomic grouping of snails and slugs, an extremely large subclass within the huge class Gastropoda according to the older taxonomy of the Gastropoda.
Conus geographicus (a marine snail)