veneracea

from The Century Dictionary.

• In conchology: A family of bivalves: same as Veneridæ.
• A superfamily or suborder of siphonate or sinupalliate bivalve mollusks, represented by the Veneridæ and related families.

from the GNU version of the Collaborative International Dictionary of English.

• proper noun plural (Zoöl.) An extensive tribe of bivalve mollusks of which the genus Venus is the type. The shells are usually oval, or somewhat heartshaped, with a conspicuous lunule. See Venus.