Clinocardium

Genus of bivalves

Clinocardium is a genus of bivalve mollusks in the family Cardiidae, commonly known as cockles. These marine bivalves are characterized by their distinctively ribbed shells and are found in various marine environments.

Description

Clinocardium nuttallii shell

Members of the genus Clinocardium possess robust, rounded shells with prominent radial ribs. The shells are typically heart-shaped, which is reflected in the name "Clinocardium," derived from Greek words meaning "inclined heart." The exterior of the shell is often adorned with concentric growth lines, and the interior is smooth with a glossy appearance.

The hinge of Clinocardium shells is equipped with well-developed cardinal and lateral teeth, which help in the articulation of the two shell valves. The coloration of these shells can vary, often displaying shades of white, cream, or brown, sometimes with darker markings.

Distribution and Habitat

Clinocardium species are distributed across various marine environments, predominantly in the northern hemisphere. They are commonly found in sandy or muddy substrates in intertidal and subtidal zones. These bivalves are adapted to burrowing into the sediment, where they can filter feed on plankton and organic particles suspended in the water.

Ecology

As filter feeders, Clinocardium species play a significant role in their ecosystems by contributing to the cycling of nutrients and maintaining water quality. They are preyed upon by a variety of marine predators, including sea stars, crabs, and fish.

The burrowing activity of Clinocardium also helps to aerate the sediment, promoting the health of the benthic environment. These bivalves are an important food source for many coastal communities and are harvested both commercially and recreationally.

Species

The genus Clinocardium includes several species, with Clinocardium nuttallii being one of the most well-known. This species, commonly referred to as the "Nuttall's cockle," is found along the Pacific coast of North America.

Related pages

• Bivalvia
• Cardiidae
• Mollusca