Cross-barred Venus Clam
Phylum: Mollusca, Class: Bivalvia, Order: Venerida, Family: Veneridae, Genus: Chione, Species: Chione cancellata · Veneridae (Venus Clam family) · Bivalve, whole shell fragment, rounded fan or triangular shape
Species
Chione cancellata
Shell Type
Bivalve, whole shell fragment, rounded fan or triangular shape
Family
Veneridae (Venus Clam family)
Size
Approximately 0.75 inches (19 mm) in length. This is on the smaller side, consistent with a juvenile or medium-sized specimen. Adults of this species typically range from 1 to 1.5 inches (25-38 mm).
Color & Pattern
Off-white to pale cream base coloration with subtle grayish or brownish hues near the posterior. The exterior is sun-bleached due to beach exposure. The texture features a distinct grid-like or cancellate pattern created by intersecting radial ribs and concentric lamellae.
Rarity
Very Common. This is a frequent find for beachcombers along the southeastern United States coastline, particularly in the Carolinas and Florida.
Habitat
Found in shallow marine waters, typically living buried just beneath the surface in sandy, muddy, or fine shell-grit substrates of intertidal zones and shallow subtidal flats, often in seagrass beds.
Geographic Range
Western Atlantic Ocean, ranging from North Carolina south through Florida, the Gulf of Mexico, the Caribbean Sea, and down to Brazil.
Description
A sturdy, compact bivalve shell characterized by its prominent sculptural grid pattern. The exterior displays strong, raised concentric ridges intersecting with fine radial ribs, forming a distinct cancellate (latticed) texture. The margin is finely crenulated, and the overall shape is sub-triangular to rounded.
Key Features
The distinct grid-like pattern formed by prominent, elevated concentric lamellae crossing radial ribs, combined with a robust, thick shell and a finely crenulated inner margin.
Collector Value
Low to moderate commercial value. Because they are very common, they are rarely bought or sold as high-end collector specimens, but they are prized by amateur beachcombers building regional representative collections.
Condition Notes
Good condition for a beach-worn specimen. The shell is intact with visible sculptural details, though it shows signs of natural wear and sun-bleaching. Collectibility grade is Good.
Interesting Facts
Venus clams are filter feeders that use short siphons to draw in water and extract microscopic algae and organic particles. The grid pattern on Chione cancellata helps stabilize the clam in shifting coastal sands.
Ecological Role
Serves an important role in benthic food webs as a filter feeder and as a significant food source for carnivorous snails, rays, and bottom-feeding fish. Collection is unrestricted and sustainable for recreational beachcombers.
Similar Species
Chione intidula (Smooth Chione) and Anomalocardia brasiliana, which can be distinguished by differences in the prominence of the concentric ridges and overall shape.
Beach Finding Tips
Look along high-tide shell lines on sandy Atlantic and Gulf beaches, especially after storms or rough surf. Sifting through fine shell-grit and broken shell piles often yields well-preserved small specimens.
Notes
Myrtle beach South Carolina