Cross-barred Venus Clam
Phylum: Mollusca, Class: Bivalvia, Order: Venerida, Family: Veneridae, Genus: Chione, Species: Chione cancellata · Veneridae (Venus Clam family) · Bivalve, whole shell, fan/oval shape
Species
Chione cancellata
Shell Type
Bivalve, whole shell, fan/oval shape
Family
Veneridae (Venus Clam family)
Size
Approximately 1 inch (25mm), which is average for this species. Adults typically range from 0.75 to 1.5 inches.
Color & Pattern
Off-white to cream base color with subtle hints of yellowish-orange. The surface features a distinct grid-like pattern formed by prominent radiating ribs intersected by raised concentric lamellae.
Rarity
Common
Habitat
Shallow subtidal and intertidal zones, typically found buried in sandy bottoms, muddy sand, or seagrass beds in marine environments.
Geographic Range
Western Atlantic, extending from North Carolina through Florida, the Gulf of Mexico, the Caribbean Sea, and down to Brazil.
Description
A sturdy, compact bivalve shell with an oval to triangular shape. The exterior sculpture is highly distinctive, featuring a coarse cancellate pattern created by strong, elevated radial ribs crossing over equally prominent concentric ridges, creating a checkerboard appearance.
Key Features
The unmistakable grid-like (cancellate) surface texture formed by intersecting radial ribs and concentric lamellae, combined with a strong internal margin and robust hinge plate.
Collector Value
Low to moderate commercial value. While very common and inexpensive to purchase, they are a staple and attractive addition to any beginner or intermediate shell collection due to their unique sculptural texture.
Condition Notes
Good condition. The shell is intact with visible original coloration and well-preserved surface sculpture. Minor natural wear on the umbo, but overall collectibility is graded as Fine.
Interesting Facts
Venus clams are filter feeders that use short siphons to draw in water for food and oxygen. They play an active role in benthic ecosystems and have robust shells that frequently survive long periods as beach drift.
Ecological Role
As benthic filter feeders, they help clear particulate matter from the water column. They serve as a food source for various marine predators including carnivorous snails, crabs, and fish.
Similar Species
Chione intapurpurea (Lady-in-waiting Venus), which tends to have more vibrant purple coloration inside the aperture, and other Chione species which differ subtly in rib count and interspace sculpture.
Beach Finding Tips
Look along sandy or shelly beaches in the southeastern United States, particularly after storms or during low tide. Sifting through shell piles and wrack lines often yields intact valves.