Lion's Paw Scallop (also known as the Knobby Scallop)
Phylum: Mollusca, Class: Bivalvia, Order: Pectinida, Family: Pectinidae, Genus: Nodipecten, Species: Nodipecten nodosus · Pectinidae (Scallop family) · Bivalve (Fan-shaped fragment). This specimen is a partial valve (likely the upper/left valve) representing about 30-40% of the original shell.
Species
Nodipecten nodosus (Confidence: 95% based on sculpture and geographic prevalence)
Shell Type
Bivalve (Fan-shaped fragment). This specimen is a partial valve (likely the upper/left valve) representing about 30-40% of the original shell.
Family
Pectinidae (Scallop family)
Size
Estimated fragment size is 2-3 inches. From the curvature, the complete shell would have been 5-6 inches, which is within the large range for this species.
Color & Pattern
Uniformly light tan to beige, likely due to significant sun-bleaching and post-mortem erosion. Natural specimens range from deep maroon to bright orange or purple. The interior appears matte and pale.
Rarity
Common as beach fragments; Uncommon to Rare as whole, intact shells found while beachcombing. High-quality specimens are usually obtained by diving.
Habitat
Subtidal marine environments; typically found on sand, rubble, or attached to rocks and coral reefs at depths of 30 to 150 feet.
Geographic Range
Western Atlantic, ranging from North Carolina and Florida through the Caribbean and Gulf of Mexico down to Brazil.
Description
A robust and heavy-shelled scallop fragment featuring large, hollow, knob-like protrusions along thick radial ribs. The surface texture is characterized by fine secondary riblets running parallel to the primary ribs, giving it a rough, sandpaper-like feel.
Key Features
Distinguished by the prominent nodes or 'knobs' on the ribs (hence 'Lion's Paw'), the heavy thickness of the shell, and the presence of fine striations across the rib surfaces.
Collector Value
Minimal for this specific specimen ($0-$1) due to its fragmented state. Intact, brightly colored 'Gem' specimens with all nodes preserved can range from $20 to $100+ depending on size and rarity of color.
Condition Notes
Poor to Fair. This is a beach-worn fragment with broken margins and significant erosion. The natural vibrant color has faded to an oceanic 'bone' white/tan, and several nodes show signs of being smoothed by wave action. Low collectibility grade.
Interesting Facts
The Lion's Paw is a hermaphroditic species. It was historically prized by early coastal inhabitants for use as a ladle or decorative vessel due to its thickness and durability.
Ecological Role
Filter feeder that consumes plankton and organic detritus. It provides a substrate for sessile organisms like barnacles and sponges to grow on its thick valves.
Similar Species
Nodipecten subnodosus (Pacific Lion's Paw) - very similar but generally grows larger and is found in the Eastern Pacific; Lyropecten antillarum - much smaller and lacks the heavy nodes.
Beach Finding Tips
Look for these after heavy storms or hurricanes, which can push deeper-water debris onto the shore. They are most commonly found on the Gulf Coast of Florida and the Caribbean islands.