Lyonsiidae

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Bivalvia
Subclassis: Anomalodesmata
Ordo: Pholadomyoida
Superfamilia: Pandoroidea
Familia: Lyonsiidae
Genera: Entodesma - Lyonsia - Lyonsella - Mytilimeria - Policordia