Gibbula zonata, commonly known as the zoned top shell, is a species of small sea snail, a marine gastropod mollusk in the family Trochidae, the top shells.
Description & Characteristics
The shell of Gibbula zonata is typically conical in shape, with a pointed apex. It is generally around 15 millimeters (0.6 inches) in height, although it can reach a maximum size of 20 millimeters (0.8 inches). The shell surface is characterized by a series of prominent, rounded, spiral ribs or ridges. These ribs give the shell a distinctive, zoned appearance, hence the common name “zoned top shell.” The color of the shell varies, but it is usually a reddish-brown or yellowish-brown with darker brown or reddish-brown bands or stripes. The aperture of the shell is circular and often has a pearly white or slightly iridescent inner lip.
Habitat and Occurrence
Gibbula zonata is a common intertidal species found in the northeastern Atlantic Ocean and the Mediterranean Sea. It is typically found in rocky shores and tide pools, where it grazes on algae and other small organisms. Gibbula zonata is adapted to a wide range of salinity and water temperatures, making it a prevalent presence in these intertidal and shallow water ecosystems. It is commonly found in the infralittoral zone, which is the area between the low tide mark and the depth at which seaweed stops growing, typically 10-15 meters deep.
Taxonomy
Gibbula zonata belongs to the Class: Gastropoda, the snails and slugs, Order: Trochida, which includes top shells and other marine snails, and Family: Trochidae, the top shells. This family is known for its diverse and colorful shells, and Gibbula zonata is a representative member.
Feeding
Like many other gastropods, Gibbula zonata is an herbivore, feeding primarily on algae and other small organisms found on rocks and seaweed. It uses its radula, a ribbon-like structure with rows of teeth, to scrape off algae and other food sources.
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