Lissotesta minima is a marine gastropod mollusk which is the second-largest phylum of invertebrate animals after the Arthropoda.
Lissotesta minima is a species of sea snail, a marine gastropod mollusk, unassigned in the superfamily Seguenzioidea. Phylum: Mollusca Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda. 
