Superregnum: Eukaryota Cladus: Unikonta Cladus: Opisthokonta Cladus: Holozoa Regnum: Animalia Subregnum: Eumetazoa Cladus: Bilateria Cladus: Nephrozoa Cladus: Protostomia Cladus: Spiralia Cladus: Lophotrochozoa Phylum: Mollusca Classis: Gastropoda Subclassis: Heterobranchia Infraclassis: Euthyneura Cohors: Tectipleura Subcohors: Euopisthobranchia Ordo: Cephalaspidea
Genus Incertae sedis: Noalda Species (1): N. exigua
Noalda Iredale, 1936
