Zebra Pleuroploca or Common Atlantic Snail-like structure, specifically a Bleeding Tooth or Nerite fragment, wait let's properly identify this as a Plicatula or a young Chama, or more accurately, a bivalve fragment known as a Zebra Duck Clam or rather Plicatula gibbosa (Kitten's Paw)
Phylum: Mollusca, Class: Bivalvia, Order: Pectinida, Family: Plicatulidae, Genus: Plicatula, Species: Plicatula gibbosa · Plicatulidae (Kitten's Paw family) · Bivalve (two-shelled), single valve fragment with irregular fan shape
Species
Plicatula gibbosa
Shell Type
Bivalve (two-shelled), single valve fragment with irregular fan shape
Family
Plicatulidae (Kitten's Paw family)
Size
Approximately 1 inch, which is typical for this species. Adults generally range from 0.75 to 1.5 inches.
Color & Pattern
Cream to white base with prominent reddish-brown to dark brown radial streaks and zebra-like banding patterns. Colors are completely natural and vibrant.
Rarity
Common
Habitat
Shallow subtidal waters, attached to hard substrates, coral reefs, rocks, and shells, typically in marine environments from the intertidal zone down to moderate depths.
Geographic Range
Western Atlantic Ocean, ranging from North Carolina through Florida, the Caribbean (including Antigua), and down to Brazil.
Description
A charming and uniquely textured bivalve shell fragment displaying strong, rough radial ribs and a crenulated margin. The exterior features a striking pattern of bold brown zebra-like stripes over an off-white background. The structure is thick and asymmetrical, typical of bivalves that cement themselves to hard surfaces.
Key Features
Strong radial ribs, cemented valve morphology, distinct alternating brown and white coloration creating a striped or mottled pattern, and a crenulated outer edge.
Collector Value
Low to moderate commercial value, but highly appreciated by beachcombers and regional shell collectors for its striking pattern and vibrant colors. Typically found in shell crafts or local collections.
Condition Notes
Single valve fragment showing some wear along the broken edges, but the surface sculpture and coloration remain remarkably fresh and well-preserved. Collectibility grade: Good.
Interesting Facts
Unlike many bivalves that move freely or use a byssus thread, species in the family Plicatulidae permanently cement one of their valves directly to rocks or coral surfaces, much like oysters do.
Ecological Role
Acts as part of the hard-bottom benthic community, providing micro-habitats for smaller organisms and serving as a food source for marine predators such as specialized gastropods and fish.
Similar Species
Chama macerophylla (Leafy Jewel Box) and Spondylus americanus (Atlantic Thorny Oyster), which can be distinguished by different spine structures and hinge mechanics.
Beach Finding Tips
Look along high-tide shell lines on rocky or coral-rich Caribbean beaches, particularly after storms when fragments and small attached shells are dislodged from offshore reefs.
Notes
Antigua