root › cellular organisms › Eukaryota › Opisthokonta › Metazoa › Eumetazoa › Bilateria › Protostomia › Spiralia › Lophotrochozoa › Mollusca › Bivalvia › Autobranchia › Pteriomorphia › Pectinida › Pectinoidea › Pectinidae › Argopecten › Argopecten irradians