Checkered Nerite or Pinstripe Nerite
Phylum: Mollusca, Class: Gastropoda, Order: Neritida, Family: Neritidae, Genus: Nerita, Species: Nerita tessellata · Neritidae (Nerite family) · Gastropod (snail/univalve), whole shell, spiral shape
Species
Nerita tessellata
Shell Type
Gastropod (snail/univalve), whole shell, spiral shape
Family
Neritidae (Nerite family)
Size
Approximately 0.5 inches (12-15 mm) in diameter, which is typical for an adult of this species. Adults generally range from 0.4 to 0.7 inches.
Color & Pattern
Characterized by a grayish-white background overlaid with distinctive black or dark gray checkerboard or zigzag patterns. The apex shows a neat spiral structure. Colors are slightly sun-bleached due to beach exposure, typical of intertidal specimens.
Rarity
Very Common, frequently encountered by beachcombers exploring rocky intertidal areas.
Habitat
Intertidal zone, primarily found on rocky shores, limestone formations, and clinging to rocks or seawalls in the splash zone, enduring extreme exposure to air and sun. Marine species.
Geographic Range
Western Atlantic Ocean, including the Caribbean Sea, the Gulf of Mexico, Florida, Bermuda, and south along the coast of South America to Brazil.
Description
A small, sturdy, hemispherical shell with a low spire and a thick, porcelain-like outer layer. The body whorl is large and rounded, featuring prominent spiral rows of dark tessellations (checkered squares) on a light grey-white base. The aperture is semicircular with a flattened columellar shelf that bears tiny teeth.
Key Features
Low spire, flattened and toothed columellar deck, solid and heavy construction for its size, and the distinct black-and-white checkered or banded square pattern.
Collector Value
Low commercial value due to high abundance, but a staple species for beginning shell collectors and educational displays. Valued mostly for educational completeness rather than monetary worth (usually valued at under $1).
Condition Notes
Fair to Good condition. The shell is intact with some minor surface weathering and loss of glossy finish due to wave action and sun exposure, but the pattern remains clearly visible.
Interesting Facts
Nerites are remarkable for their ability to breathe air and survive out of water for extended periods in the harsh intertidal zone. They use a powerful rasping radula to scrape microalgae off rocks.
Ecological Role
Acts as a primary herbivore controlling microalgal growth on rocky substrates. Serves as a food source for shorebirds, small fish, and predatory crabs in the intertidal food web.
Similar Species
Bleeding Tooth Nerite (Nerita peloronta) and Four-toothed Nerite (Nerita versicolor). Distinguished by the bright red coloration on the teeth of the Bleeding Tooth and the more vibrant striping of N. versicolor.
Beach Finding Tips
Look along rocky coastlines, jetty stones, or limestone outcroppings at low tide. Check crevices and high-tide lines where wave action deposits intertidal drift.