Barnea
Barnea is a genus of bivalve mollusks belonging to the family Pholadidae. They are commonly known as “piddocks” or “shipworms,” though they are not true shipworms (Teredo spp.). These burrowing marine animals are found in various coastal environments worldwide.
Characteristics
Barnea species have a distinctive shell shape, elongated and cylindrical, with a slightly curved, pointed anterior end. The shell is typically white or off-white, sometimes with a yellowish or brownish tinge. Their valves are thin and fragile, with prominent, sharp, and often irregular ridges. The siphons are long and extensible, allowing the piddock to filter feed while burrowed in the sediment or rock.
Environments
Barnea species are known for their ability to burrow into various substrates, including soft sediments, mud, clay, and even hard rock. They are commonly found in intertidal and subtidal zones, often in areas with strong wave action. Their burrows can be quite deep, sometimes reaching several centimeters into the substrate. The presence of Barnea can be a sign of healthy, diverse marine ecosystems, as they play a role in bioturbation and nutrient cycling.
Common Names
Barnea species are commonly known as:
- Piddocks
- Shipworms
- Rock borers
References