Lobed Venus (also known as the Frilly Venus or Elegant Venus)
Phylum: Mollusca; Class: Bivalvia; Order: Venerida; Family: Veneridae; Genus: Lirophora; Species: Lirophora paphia · Veneridae (Venus Clams) · Bivalve; single valve (left or right valve); trigonal-ovate shape with prominent concentric ridges.
Species
Lirophora paphia
Shell Type
Bivalve; single valve (left or right valve); trigonal-ovate shape with prominent concentric ridges.
Family
Veneridae (Venus Clams)
Size
Approximately 0.75 to 1.25 inches (20-30mm). This is typical for a mature specimen of this species.
Color & Pattern
Creamy white to light beige base. It often features three distinct brownish-tan radial bands over the concentric ribs. The specimen in the image appears slightly weathered or sun-bleached, typical of beach-drift finds.
Rarity
Common to Uncommon. While widely distributed, finding a perfectly intact valve with vibrant color on the beach requires patience.
Habitat
Marine; found in shallow subtidal waters, typically in sandy substrates at depths of 2 to 50 meters.
Geographic Range
Western Atlantic: from North Carolina to Florida, the Gulf of Mexico, Caribbean Sea, and south to Brazil.
Description
A sturdy, triangularly-ovate bivalve characterized by heavy, thickened concentric ribs. These ribs are often flattened or 'lobed' towards the posterior end, giving the shell a beautiful architectural appearance. The interior is smooth, often with a hint of purple or pink at the muscle scars.
Key Features
The most diagnostic feature is the thick, prominent concentric ridges that are slightly undercut and 'bladed.' These ridges typically recurve slightly toward the umbo (the beak).
Collector Value
Low to Moderate ($2 - $10). It is a highly desirable shell for aesthetic arrangements and beginner collections due to its 'frilly' appearance, but it is not rare enough for high market value.
Condition Notes
The specimen shows some rounding of the sharp ridges and bleaching, suggesting it spent time in the surf zone. Collectibility Grade: Good (Fine for reference, though lacking live-taken luster).
Interesting Facts
The Venus family is named after the Roman goddess of love and beauty. Many species in this family, like the Mercenaria, were used by Native Americans to make wampum beads.
Ecological Role
Suspension feeder; it filters phytoplankton from the water column. It serves as a prey item for predatory gastropods like whelks and murexes who drill through the thick shell.
Similar Species
Lirophora latilirata (Imperial Venus), which has fewer, much thicker, and more rounded concentric ribs compared to L. paphia.
Beach Finding Tips
Look in shell drifts after storms on Gulf and Caribbean beaches. Because they are heavy for their size, they often settle in the lower wash zones rather than high on the wrack line.