One Basket Clam Shell of the Corbulidae Family can be found in this website:

Basket Clam Shells of the Corbulidae Family

Other Basket  Clam Shell, Caryocorbula otra. A representative of the Corbulidae Family of Basket Clam Shells.

Phylogeny: The Corbulidae Family of Basket Clams is in the phylum Mollusca. They are in the class Bivalvia, the subclass Autobranchia, the infraclass Heteroconchia, the subterclass Euheterodonta, the superorder Imparidentia, the order Myida, and the superfamily Myoidea. The Corbulidae Family is one of two families in this superfamily. The Corbulidae Family contains two subfamilies, twelve genera, and eighty-two species. The name Corbulidae comes from New Latin and means “little basket”, and refers to the basket-shape of these shells. Species in the Corbulidae Family are also commonly known as Corbulids.

Description: Basket Clam Shells may be elongate, ovate, trigonal, or quadrate in outline. They vary from slightly inflated to very inflated in profile. The shells are generally thick and solid. Some species are inequivalve, with the  right valve larger and ventrally overlapping the left. Most have a longer posterior end, but they may be equilateral or slightly longer anteriorly.  The posterior end may be beak-like (rostrate) or rounded, and is offset by a ridge or keel. The anterior end may be rounded to broadly rounded. These shells may be smooth or sculpted with weak to strong commarginal ribs. Some have radial striae.  Most species have a weak heterodont hinge, with a central tooth in the right valve. The pallial line is usually weak, and the pallial sinus is generally small or absent. The ventral margin is smooth.  The exterior of these shells is usually white in color,  though some are pinkish, reddish-brown or tan. Similarly the interior is usually white, but some have brown, pink, or purple blotches or blushing.  Basket Clam Shells are medium sized, reaching a maximum length of around 3.5 cm (1.4 inches) in length.

Habitat and Distribution: Basket Clams are found buried in mud or muddy sand, or on shell hash. They prefer bays, estuaries, and other areas of limited water movement. They live in the intertidal zone and to depths exceeding 1,400 m (4,592 feet). Basket Clam Shells are found worldwide in temperate to tropical waters. Fifteen species from the Corbulidae Family are found in Mexican waters.

Natural History: Basket Clams are suspension feeders that filter plankton and fine detritus from the surrounding water. Their predators include birds, crabs, carnivorous mollusks, sea stars, and rays. They are gonochoric and reproduce sexually, through broadcast spawning, with external fertilization.