Moelleriopsis messanensis belongs to the class Gastropoda, which comprises snails and slugs, and under phylum Mollusca, the second-largest phylum of invertebrate of kingdom Animalia.
Class: Gastropoda The gastropods (/strpdz/), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda /strpd/. Phylum: Mollusca Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda. Kingdom: Animalia 
