Retusa mammillata

Domain: Eukaryota • Regnum: Animalia • Subregnum: Eumetazoa • Cladus: Bilateria • Superphylum: Protostomia • Phylum: Mollusca • Classis: Gastropoda • Subclassis: Opisthobranchia • Ordo: Cephalaspidea • Familia: Retusidae • Genus: Retusa • Species: Retusa mammillata (Philippi, 1836)