Rangia cuneata or Atlantic rangia, also known as wedge clam, gulf wedge clam, common rangia, and cocktail clam, is a mollusc native to the Gulf of Mexico. It is an oval clam with a body length of up to 5 cm, living from the intertidal zone to depths of 124 meters. It is edible and is harvested for food in Mexico, and has been so since pre-Hispanic times.