The Addisonia excentrica is scientifically classified as kingdom animalia, phylum mollusca and class gastropoda.
Kingdom: Animalia Phylum: Mollusca Class: Gastropoda 
Addisonia excentrica is a species of sea snail, a marine gastropod mollusk in the family Addisoniidae. The gastropods (/strpdz/), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda /strpd/. Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda. Kingdom: Animalia The members are known as molluscs or mollusks (/mlsk/). 
