Turbinate Turban or Green Star Shell
Phylum: Mollusca, Class: Gastropoda, Order: Vetigastropoda, Family: Turbinidae, Genus: Astraea, Species: Astraea tuber · Turbinidae (Turban and Star shells) · Gastropod (univalve), whole shell, spiral shape
Species
Astraea tuber (likely immature or related turban species)
Shell Type
Gastropod (univalve), whole shell, spiral shape
Family
Turbinidae (Turban and Star shells)
Size
Approximately 1/2 to 3/4 inch, which indicates an immature specimen. Adults of this family typically range 1 to 3 inches.
Color & Pattern
Pale greenish and brownish banding visible on the upper spire, with a white to cream base body whorl. The interior of the aperture shows pearly nacre tones.
Rarity
Common in its native range, though intact small specimens are frequently collected by beachcombers.
Habitat
Shallow subtidal and intertidal zones, typically found on rocky substrates, coral rubble, and algae-covered reefs.
Geographic Range
Tropical Western Atlantic, including the Caribbean Sea, Florida Keys, and the Gulf of Mexico.
Description
A small, sturdy turban or star shell featuring a distinct tiered spire with scalar or knobbed ridges. The body whorl is rounded, opening to a rounded aperture with a pearly interior, typical of the Turbinidae family.
Key Features
Stepped spire with spiral ridges, rounded body whorl, and characteristic nacreous interior aperture structure.
Collector Value
Low to moderate commercial value as a common beach find, though popular in starter collections and shell craft due to its pearly interior.
Condition Notes
The shell is mostly intact though shows signs of wear, slight bleaching, and minor breakage around the outer lip. Overall condition is Fair to Good for a beach find.
Interesting Facts
Members of the Turbinidae family possess a heavy calcareous operculum often known as 'cat's eye' which they use to seal the aperture when retreating into the shell.
Ecological Role
Herbivorous grazers that feed on microalgae, helping to control algae growth on coral reefs and rocky shores.
Similar Species
Other members of the Turbinidae family such as Lithopoma americanum (American Star Shell), distinguished by more pronounced peripheral spines.
Beach Finding Tips
Look in shell drift lines, rocky tide pools, and areas with coral rubble after rough wave action in the Caribbean or Southern Florida.