| Anomia
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| Two upper valves of A. ephippium | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Pectinida |
| Family: | Anomiidae |
| Genus: | Anomia Linnaeus, 1758 |
| Species | |
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| Synonyms | |
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Anomia is a genus of saltwater clams, marine bivalve mollusks in the family Anomiidae. They are commonly known as jingle shells because when a handful of them are shaken they make a jingling sound,[2] though some are also known as saddle oysters.[3]
This genus first appeared in the Permian period of China, Italy, and Pakistan.[4] Anomia species are common in both tropical and temperate oceans and live primarily attached to rock or other shells via a calcified byssus that extends through the lower valve.[1] Anomia shells tend to take on the surface shape of what they are attached to; thus if an Anomia is attached to a scallop shell, the shell of the Anomia will also show ribbing.[1] The species A. colombiana has been found in the La Frontera FormationofBoyacá, Cundinamarca and HuilaofColombia.[5]
Species:[6]
AsAnomia was erected very early in paleontology, several species have been reassigned; most of them are now recognized as brachiopods.[7][8]
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