The Class Gastropoda (in Phylum Mollusca) includes the groups pertaining to snails and slugs. The majority of gastropods have a single, usually spirally, coiled shell into which the body can be withdrawn.

What is a slug classified as?

Slugs and snails are classified as gastropods, with “gastro" meaning stomach and “pod" meaning foot. ... Some slugs have soft internal shells or prominent mantles, while others have nothing at all. Both slugs and snails have two upper tentacles that protrude from their foreheads.

How are mollusks classified?

Mollusks can be segregated into seven classes: Aplacophora, Monoplacophora, Polyplacophora, Bivalvia, Gastropoda, Cephalopoda, and Scaphopoda. These classes are distinguished by, among other criteria, the presence and types of shells they possess.