Description: English: Underside of the Keyhole Sand Dollar, Mellita quiquiesperforata. Hundreds of tube feet used in locomotion and known as Podia. Mouth and anus of sand dollar located in center. Photograph by Sharon Mooney, 2006, Keyhole Sand Dollar. Date: 20 January 2007 (original upload date). Source: Transferred from en.wikipedia to Commons by Quadell using CommonsHelper. Author: Edwardtbabinski at English Wikipedia.
Mellita quinquiesperforata, aboral view of denuded test. Bessa Beach, Paraiba, Brazil, South Atlantic Ocean. Source : Echinoderms of Panama (http://echinoderms.lifedesks.org/file-colorboxed/182).