Tegula quadricostata, commonly known as the “four-ribbed turban snail,” is a species of marine gastropod mollusk belonging to the family Tegulidae. This snail is a distinctive and common sight in the intertidal zones of the Pacific coast of North America.
Description & Characteristics
Tegula quadricostata is characterized by its robust, conical shell that can reach a maximum size of approximately 25 millimeters in diameter. The shell is typically a deep reddish-brown color, often with varying shades of brown, orange, or yellow. As the name suggests, four prominent, raised ribs run vertically along the shell, adding to its distinctive appearance.
Habitat and Occurrence
Tegula quadricostata is a predominantly intertidal species, meaning it lives in the area between high and low tides. This snail is commonly found in the rocky intertidal zones along the Pacific coast of North America, from Alaska to Baja California. It is particularly prevalent in the lower intertidal zone, where it can be observed clinging to rocks and exposed surfaces. The marine zones where Tegula quadricostata is most frequently observed include the infralittoral zone, which extends from the low tide mark to the edge of the continental shelf.
Taxonomy
Tegula quadricostata belongs to the Class: Gastropoda, Order: Trochida, and Family: Tegulidae. This classification places it within a diverse group of snails known for their spiral shells and often colorful patterns. The family Tegulidae specifically encompasses turban snails, which are known for their robust shells and often brightly colored patterns.
Feeding
Tegula quadricostata is primarily a herbivore, feeding on algae that grows on the rocky surfaces of its habitat. Its strong, radula, a ribbon-like structure with teeth, is used to scrape algae off rocks and other surfaces. The snail’s diet consists of a variety of algae, including red, green, and brown algae, which it consumes in large quantities. This herbivorous feeding behavior plays a significant role in the ecological balance of intertidal communities, helping to control the growth of algae and provide a food source for other marine organisms.
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