Lutraria
Lutraria is a genus of saltwater clams, marine bivalve mollusks in the family Mactridae, the “surf clams”. These clams are commonly referred to as “razor clams” or “surf clams” due to their elongated, blade-like shells. They are found in sandy or muddy bottoms along the coasts of the Atlantic and Pacific Oceans. Lutraria species are generally burrowing clams, with the anterior portion of the shell protruding slightly above the sediment surface.
Characteristics
Lutraria clams typically have long, narrow shells with a smooth surface and a rounded posterior end. The shell is usually white to yellowish-brown in color and may have faint growth lines. The hinge line is long and straight, with two prominent teeth in each valve. The siphons are long and separate, allowing the clam to filter food from the water while remaining buried in the sediment.
Habitat and Distribution
Lutraria species are found in a variety of coastal habitats, including sandy beaches, mudflats, and estuaries. They prefer areas with moderate wave action and a steady supply of fresh water. Lutraria clams are generally found in shallow waters, typically at depths of up to 50 meters. Their geographic distribution is relatively wide, with species found along the coasts of Europe, North America, and South America.
Species
There are several recognized species within the genus Lutraria, including:
- Lutraria angustior
- Lutraria bella
- Lutraria borealis
- Lutraria elliptica
- Lutraria lutraria
- Lutraria maxima
- Lutraria radiata
- Lutraria siliqua
References
For further information on Lutraria, you can refer to the following reliable sources: