Cross-barred Venus Clam (also known as the Little Cross-barred Venus)
Phylum: Mollusca, Class: Bivalvia, Order: Venerida, Family: Veneridae, Genus: Chione, Species: Chione cancellata · Veneridae (Venus clams) · Bivalve (two-shelled), specifically a single valve fragment or small complete valve with a roughly triangular-ovate shape.
Species
Chione cancellata
Shell Type
Bivalve (two-shelled), specifically a single valve fragment or small complete valve with a roughly triangular-ovate shape.
Family
Veneridae (Venus clams)
Size
Approximately 0.5 to 0.75 inches, which is on the smaller side but typical for immature or average beach-worn specimens of this species. Adults typically range from 0.75 to 1.5 inches.
Color & Pattern
The exterior exhibits a weathered off-white to creamy beige base color with subtle hints of brownish gray banding between the raised ribs. The colors are heavily sun-bleached due to beach exposure. The interior is largely obscured by sand in the photograph, but typically features a smooth, porcelain-like white or purple-tinged surface.
Rarity
Very Common, frequently encountered as whole shells and fragments along Gulf Coast beaches such as Surfside Beach, Texas.
Habitat
Found in shallow subtidal to intertidal zones, buried shallowly in sandy or muddy sand substrates, often associated with seagrass beds and protected bays.
Geographic Range
Western Atlantic Ocean, ranging from North Carolina through the Gulf of Mexico, Florida, the Caribbean, and down to Brazil.
Description
A sturdy, compact bivalve featuring a distinct grid-like or cancellate sculpture formed by prominent, elevated concentric lamellae intersecting with radiating radial ribs. The margin is finely crenulated, and the overall form is thick-shelled and robust to withstand wave action in high-energy coastal environments.
Key Features
Distinctive cross-hatched (cancellate) surface sculpture created by strong concentric ridges crossing over radial ribs, resulting in a rough, textured grid pattern across the exterior surface.
Collector Value
Low commercial or collector value due to common occurrence and worn condition. It is a classic beginner shell for beachcombers rather than a prized cabinet specimen.
Condition Notes
Fair condition; this is a weathered, beach-worn fragment or individual valve covered with adhering fine sand grains. It shows signs of abrasion and complete bleaching of natural pigments, typical of specimens tossed in the surf zone. Collectibility grade is Poor to Fair.
Interesting Facts
Venus clams get their family name from Venus, the Roman goddess of love, beauty, and prosperity, whose mythological birth occurred from a sea shell. Chione cancellata uses its muscular foot to burrow just beneath the surface of the sand, where it filter-feeds on microscopic plankton.
Ecological Role
Serves as an important prey item for carnivorous gastropods, fish, and shorebirds. As filter feeders, they help clarify coastal waters by consuming suspended organic matter and phytoplankton.
Similar Species
Chione intidula (Smooth Chione) and other Chione species, which can be distinguished by finer or less prominent radial ribbing and variations in the concentric lamellae.
Beach Finding Tips
Look along the high tide wrack line on sandy Gulf Coast beaches, especially after storms or strong onshore winds. Sifting through shell piles using a scoop or looking closely at coarse sand layers often reveals smaller intact valves.
Notes
Surfside Beach Texas