A number of species have developed special adaptations to feeding, such as the "drill" of some limpets, or the harpoon of the neogastropod genus Conus.
It is a condition characteristic of the Mesogastropoda and Neogastropoda, and is the obverse of the more-primitive hypoathroid condition in which the pleural and pedal ganglia lie close together under the animal's gut and communicate with the cerebral ganglia via long connectives.
It is a condition that is characteristic of the Archaeogastropoda clade, and is the inverse of the evolutionarily more recent epiathroid condition, characteristic of the Mesogastropoda and Neogastropoda, in which the pleural, pedal, and cerebral ganglia all lie close together.
Marginellidae, or the margin shells, are a taxonomic family of small, often colorful, sea snails, marine gastropod molluscs in the clade Neogastropoda.
Mitridae, known as mitre shells, are a taxonomic family of sea snails, widely distributed marine gastropod molluscs in the clade Neogastropoda.
Nassariidae, common name nassa mud snails (USA), or dog whelks (UK), are a taxonomic family of small to medium-sized sea snails, marine gastropod mollusks in the clade Neogastropoda.
These animals are marine gastropod molluscs in the superfamily Olivoidea, within the clade Neogastropoda according to the taxonomy of Bouchet and Rocroi.
The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda.