Kingdom Animalia (animals) Eumetazoa (metazoans) Bilateria (bilaterally symmetrical animals) Protostomia (protostomes) Lophotrochozoa Trochozoa Mollusca (clams, snails, squids, and relatives) Class Bivalvia Order Veneroida Superfamily Veneroidea Family Veneridae Genus Saxidomus Species Saxidomus gigantea (Washington butterclam) Species Saxidomus nuttalli (California butterclam)
