Granulated Conch Shell | Mexican Shells.org

Granulated Conch Shell, Persististrombus granulatus

Granulated Conch Shell, Persististrombus granulatus, Juvenile. Shell collected off the beach in the greater Punta Chivato area, Punta Chivato, Baja California Sur, February 2023. Size: 6.7 cm (2.6 inches) x 2.2 cm (0.9 inches). Collection, photograph and Identification courtesy of Colin Campbell, DVM, Punta Chivato.

Granulated Conch Shell, Persististrombus granulatus. Shell collected off the beach in the greater Los Cabos area, Baja California Sur, June 2022. Size: 10.9 cm (4.25 inches) x 7.1 cm (2.8 inches) in height.

The Granulated Conch, Persististrombus granulatus (Swainson,1822), is a gastropod mollusk that is a member of the Strombidae Family of True Conchs. They are also known as the Knobby Fighting Conch and in Mexico as the cambute nodoso. The shells are rugged, but graceful with the body consisting of six or seven whorls. They have a tall, slender, spire. Both the spire and body have strong tubercles or knobs. Mature specimens have granulations inside the outer lip of the aperture. The exterior of the shell is whitish with light brown spots or streaks. Juvenile shells may be beige, pink, purple or red in color. The periostracum is thin and velvety. Granulated Conch shell reach a maximum of 10.9 cm (4.25 inches) in length and 7.1 cm (2.8 inches) in height.

Granulated Conchs are found on sand or rubble. They range in depth from the low intertidal zone to depths up to 75 m (246 feet). They are found throughout the Sea of Cortez, and range south to Peru. They are not documented from the west coast of the Baja Peninsula.

Strombus granulatus, Strombus granulatus acutus, and Strombus granulatus cortezianus are synonyms for this species.