Cryptoplacidae
Cryptoplacidae is a family of small, marine snails, classified within the subclass Patellogastropoda. These snails are commonly known as “keyhole limpets” due to the characteristic keyhole-shaped aperture on their shells. Cryptoplacidae are widely distributed in the world’s oceans, primarily in intertidal and subtidal zones.
Characteristics
Keyhole limpets are distinguished by several key characteristics:
- Shell: Their shells are typically conical or dome-shaped, with a prominent, centrally located keyhole aperture. The aperture serves as an outlet for water flow and gas exchange, and it is also used for waste expulsion.
- Size: Cryptoplacidae are generally small, ranging from a few millimeters to a few centimeters in length.
- Coloration: The color of their shells can vary depending on the species and habitat, ranging from brown and gray to shades of green and red.
- Foot: Like other limpets, they have a large, muscular foot that they use for locomotion and clinging to rocks.
- Radula: They possess a radula, a ribbon-like structure in their mouth with rows of tiny teeth, which they use to scrape algae and other organic matter from surfaces.
Environments
Cryptoplacidae are found in a variety of marine habitats, but they are most commonly found in intertidal zones, where they are exposed to the air and waves during low tide. They are also found in subtidal zones, where they live on rocks and other hard substrates.
References
For further information, please refer to the following resources: