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: †Helcionelloida
Ordo: Helcionellida
Familiae (8): Coreospiridae - Helcionellidae - Igarkiellidae - Procarinariidae - Rugaeconidae - Stenothecidae - Trenellidae - Yochelcionellidae
References
Links
Paleobiology Database
Retrieved from "http://en.wikipedia.org/"
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