Checkered Nerite, also known as Tessellated Nerite
Phylum: Mollusca, Class: Gastropoda, Order: Cycloneritida, 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 length and width, which is average for this species. Adults typically range from 0.4 to 0.7 inches.
Color & Pattern
Features a distinct checkered or tessellated pattern with alternating squares or bands of black/dark brown and white or light gray. The colors appear slightly sun-bleached due to exposure, which is common for intertidal shells.
Rarity
Very Common, frequently found by beachcombers exploring rocky intertidal areas.
Habitat
Inhabits high intertidal and supratidal zones on rocky shores, limestone formations, and seawalls, splashing by waves but exposed to air for long periods. 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.
Description
A small, sturdy, globular gastropod shell featuring a low spire and a flattened, tooth-bearing inner lip (columella). The surface has fine spiral cords and the signature checkered pattern that makes it easily recognizable.
Key Features
Globular shape with a low spire, flattened columellar area with small denticles (teeth) on the inner lip, and the distinctive black-and-white checkered color pattern.
Collector Value
Low commercial value as they are very common, but a staple micro-shell for beginners and specialized nerite collections. Typically found rather than purchased.
Condition Notes
Fair to Good condition. The shell is intact with some minor sun-bleaching and wear on the surface sculpture, typical of intertidal drift specimens. Collectibility grade is Good.
Interesting Facts
Nerites are remarkably resilient to desiccation and can breathe air for extended periods when exposed during low tide. They graze on microscopic algae using a ribbon-like radula.
Ecological Role
Acts as an important algae grazer on rocky intertidal substrates, helping to control algal growth and serving as a food source for coastal predators such as birds and fish.
Similar Species
Bleeding Tooth Nerite (Nerita peloronta) and Four-toothed Nerite (Nerita versicolor). Distinguished by the lack of red/orange tooth coloration and specific banding patterns.
Beach Finding Tips
Look along rocky shorelines, jetties, and limestone outcrops during low tide. Check crevices and high-tide drift lines where small shells accumulate.