Turkey Wing (Alternate names: Zebra Mussel-like Ark, StRIte Ark)
Phylum: Mollusca, Class: Bivalvia, Order: Arcida, Family: Arcidae, Genus: Arca, Species: Arca zebra · Arcidae (Ark shell family) · Bivalve (two-shelled). This is a single valve (fragment/half shell) with an elongated, trapezoidal/boat-like shape.
Species
Arca zebra
Shell Type
Bivalve (two-shelled). This is a single valve (fragment/half shell) with an elongated, trapezoidal/boat-like shape.
Family
Arcidae (Ark shell family)
Size
Approximately 2.5 to 3 inches in length for this fragment. Whole adults typically range from 2 to 4 inches, making this a medium-to-large sized specimen for the species.
Color & Pattern
Striking zebra-like pattern featuring alternating bands of rich chestnut brown and creamy white or pale tan. The colors are entirely natural and vivid. The interior shows a porcelain-white surface with brownish margins corresponding to the exterior stripes.
Rarity
Common. Turkey Wings are regularly found washed up on Gulf and Atlantic beaches, though finding a complete, undamaged matched pair is less common than finding single valves.
Habitat
Found in shallow subtidal waters to moderate depths, typically attached by strong byssal threads to hard substrates such as coral reefs, rocks, jetties, and occasionally large shells in marine environments.
Geographic Range
Western Atlantic Ocean, ranging from North Carolina through Florida, the Gulf of Mexico, the Caribbean, and down to Brazil.
Description
An attractive and sturdy bivalve shell featuring a distinctive elongated, rectangular to trapezoidal shape resembling a turkey's wing. The exterior is heavily sculpted with prominent, radiating ribs crossed by fine concentric growth lines, creating a textured, grid-like appearance. The hinge line is long and straight with a series of numerous small, interlocking teeth.
Key Features
Elongated boat-like shape, straight long hinge line with numerous parallel teeth, and striking zebra-like brown and white transverse stripes.
Collector Value
Low to moderate value. Because they are common beach finds, individual single valves have little monetary value (usually under $1), but they are staples for beginner shell collections due to their bright, attractive patterns.
Condition Notes
Fair to Good condition. This is a single, detached valve rather than a paired living shell. It shows minor wear along the edges and beak, but the vibrant brown and white color bands remain sharp and well-preserved. Collectibility grade: Good.
Interesting Facts
Unlike many bivalves that burrow into sand, Ark shells use tough, fibrous threads called a byssus to anchor themselves permanently to hard surfaces. They are filter feeders and can tolerate varying water conditions.
Ecological Role
As filter feeders, they help clean seawater by consuming phytoplankton and suspended organic matter. They also provide structural habitat and micro-habitats for various small marine organisms. Not endangered or heavily regulated.
Similar Species
Transverse Ark (Anadara transversa) and Cut-ribbed Ark (Anadara floridana). Turkey Wings are easily distinguished by their bright brown zebra stripes and more elongated, rectangular wing-like profile.
Beach Finding Tips
Look along the wrack line on sandy Gulf and Atlantic beaches, especially after storms or high tides. They frequently wash ashore near jetties, pier pilings, and rocky outcrops where the living animals anchor.
Notes
Gulf shores Alabama