Clinocardium

FMIB 52944 Cardium corbis (young specimen)

Clinocardium is a genus of marine bivalve mollusks in the family Cardiidae, commonly known as cockles. These bivalves are characterized by their distinctively heart-shaped shells, which are often ribbed and can vary in color from white to brownish hues. The genus name "Clinocardium" is derived from the Greek words "klinein," meaning to lean, and "kardia," meaning heart, referring to the shape of the shell.

Description

Members of the genus Clinocardium possess robust, thick shells with prominent radial ribs. The shells are equivalve, meaning both halves are of equal size, and they are typically heart-shaped when viewed from the side. The interior of the shell is usually smooth and may have a pearly luster. The hinge line of Clinocardium species is equipped with well-developed cardinal teeth, which help in the alignment and closing of the shell.

Habitat

Clinocardium species are found in a variety of marine environments, ranging from intertidal zones to deeper waters. They are commonly found buried in sandy or muddy substrates, where they use their muscular foot to dig and anchor themselves. These bivalves are filter feeders, drawing in water through their siphons to extract plankton and other small particles for nourishment.

Distribution

The distribution of Clinocardium species is widespread, with various species inhabiting coastal regions around the world. They are particularly abundant in the temperate and cold waters of the Northern Hemisphere, including the coasts of North America, Europe, and Asia.

Species

Several species are classified under the genus Clinocardium, including but not limited to:

• Clinocardium nuttallii - Nuttall's cockle
• Clinocardium ciliatum - Fringed cockle

Ecological Importance

Clinocardium species play a significant role in their ecosystems as filter feeders. By filtering water, they help maintain water quality and clarity. Additionally, they serve as a food source for various predators, including birds, fish, and humans.

Human Use

Some species of Clinocardium are harvested for their edible meat, which is considered a delicacy in many cultures. They are often collected by hand or through commercial fishing operations. The shells of Clinocardium species are also used in decorative arts and jewelry.

Related Pages

• Bivalvia
• Cardiidae
• Filter feeder
• Marine biology