Patellogastropoda

Limplets various examples

Patelle - vue des différents organes externes

Saltwater Limpet Diagram-en

Cuncha033eue

CornishLimpets

Common limpets1

Patellogastropoda

Patellogastropoda is an order of marine gastropod mollusks commonly known as true limpets. These organisms are characterized by their simple, conical shell structure and their strong, muscular foot, which they use to adhere tightly to rocky surfaces in the intertidal zone.

Taxonomy

Patellogastropoda is one of the major orders within the class Gastropoda. The order is divided into several families, including:

• Acmaeidae
• Lottiidae
• Nacellidae
• Patellidae

Morphology

The shell of Patellogastropoda is typically low and conical, with a smooth or slightly ridged surface. The interior of the shell is often iridescent. The foot is large and muscular, allowing the limpet to cling to rocks with great tenacity. The head bears a pair of tentacles and a radula, which is used for scraping algae and other food particles from the substrate.

Habitat

Patellogastropoda are primarily found in the intertidal zone, where they are exposed to both air and water. They are adapted to withstand the harsh conditions of this environment, including strong wave action and desiccation during low tide. Some species are also found in subtidal zones.

Behavior

These limpets are known for their homing behavior, where they return to the same spot on the rock after foraging. This spot, known as a "home scar," is often a depression in the rock that matches the shape of the limpet's shell, providing a secure fit.

Reproduction

Patellogastropoda typically have separate sexes, and fertilization is external. The larvae are planktonic and undergo several stages of development before settling onto a suitable substrate and metamorphosing into the adult form.

Ecological Role

Patellogastropoda play a crucial role in the intertidal ecosystem. By grazing on algae, they help control algal growth and maintain the balance of the ecosystem. They are also a food source for various predators, including birds, fish, and other marine animals.

Conservation

Some species of Patellogastropoda are threatened by habitat loss, pollution, and overharvesting. Conservation efforts are focused on protecting their habitats and regulating harvesting practices.

Related Pages

• Gastropoda
• Limpet
• Intertidal zone
• Radula
• Marine biology