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] The species A. colombiana has been found in the La Frontera Formation of Boyacá, Cundinamarca and Huila of Colombia.