Anomiidae
Anomiidae is a family of saltwater bivalve mollusks that are commonly called “jingle shells” due to the sound they make when they are knocked together. These animals are unusual in the way they attach themselves to hard surfaces, using a stalk-like structure, similar to that of a stalked barnacle, rather than byssal threads.
Characteristics
Anomiidae have an irregular, asymmetrical shell shape, with the right valve (the one that is attached to the substrate) being flatter and smaller than the left valve. The right valve is often perforated with a circular opening, called the "foramen," through which the stalk passes. The left valve is typically more convex and often has radiating ridges or ribs. The shell surface can be smooth or sculptured, and the color can vary from white to brown, green, or orange. The hinge is located on the dorsal side of the shell, and there are two teeth on the left valve and one tooth on the right valve. Anomiids are filter feeders, using their gills to capture food particles from the water. They are hermaphroditic, meaning that each individual can produce both eggs and sperm.
Environments
Anomiidae are found in shallow to deep water in marine environments around the world. They are typically found attached to rocks, shells, and other hard surfaces. They are often found in areas with strong currents, as the water flow helps to bring them food particles. Some species can also be found living in the intertidal zone, where they are exposed to air at low tide.
Common Names
Common names for Anomiidae include:
- Jingle shells
- Saddle oysters
- Anomiids
References
World Register of Marine Species
Animal Diversity Web
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