Cross-barred Venus Clam
Phylum: Mollusca, Class: Bivalvia, Order: Venerida, Family: Veneridae, Genus: Chione, Species: Chione cancellata · Veneridae (Venus Clam family) · Bivalve (two-shelled), whole shell, fan or triangular shape
Species
Chione cancellata
Shell Type
Bivalve (two-shelled), whole shell, fan or triangular shape
Family
Veneridae (Venus Clam family)
Size
Approximately 0.75 inches (1.9 cm), which is average for this species. Adults typically range from 0.5 to 1.5 inches (1.3 to 3.8 cm).
Color & Pattern
Off-white to cream base color with subtle brownish or grayish radial bands sometimes visible, though this specific specimen is largely bleached to a pristine glossy white. The exterior shows clear natural luster; the interior is smooth and porcelain-white.
Rarity
Very Common
Habitat
Found in shallow marine waters, typically inhabiting intertidal to shallow subtidal zones down to about 20 meters. Prefers sandy substrates, muddy sand, or seagrass beds.
Geographic Range
Western Atlantic Ocean, ranging from North Carolina through the Gulf of Mexico, the Caribbean Sea, and down to Brazil.
Description
A charming and sturdy small bivalve featuring a distinct, highly textured grid-like pattern. The surface is sculpted with prominent concentric ridges intersecting with strong radial ribs, creating the distinctive cross-barred appearance that gives the species its common name. The margin is finely crenulated, and the overall shape is solid and somewhat triangular.
Key Features
Distinctive cross-barred sculpture formed by the intersection of strong radial ribs and prominent concentric lamellae; sturdy, thick shell; finely toothed inner margins.
Collector Value
Low to moderate commercial value, but highly popular among beginner beachcombers and shell enthusiasts due to their appealing geometric texture. Typically valued at a few cents to a dollar per specimen unless part of a specialized locality set.
Condition Notes
Gem to Fine condition. Intact single valve with well-preserved exterior sculpture, no major chips, cracks, or boring marks, and retains a clean, bright appearance.
Interesting Facts
Cross-barred venus clams are filter feeders that use specialized siphons to draw in water and extract microscopic plankton. Like many venerid clams, they play an important role in benthic nutrient cycling and serve as a vital food source for bottom-feeding fish, rays, and carnivorous gastropods.
Ecological Role
Serves as an active filter feeder helping to maintain water clarity, functions as prey for various marine predators, and contributes calcium carbonate to the marine sediment upon death.
Similar Species
Chione mazyckii (Mazyck's Venus) and Anomalocardia brasiliana. Chione cancellata is distinguished by its particularly sharp, well-defined lattice-like grid and more evenly spaced concentric ridges.
Beach Finding Tips
Look along high-tide shell lines on sandy Gulf of Mexico or Caribbean beaches, particularly after storms or heavy wave action. Sifting through fine shell gravel often yields well-preserved individual valves.