Fossil range

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Fossil E. galapagensis from the limestone of Isla Santa Cruz [California Academy of Sciences, Geology (CASG) 98241-2] and Isla Baltra (CASG 98243) in the Galapagos Archipelago are morphologically identical to extant members of this species, and based on the stratigraphy of Hickman & Lipps (1985), date from 2.58-1.8 Ma in the Galesian Stage of the Pleistocene. (Coppard & Lessios, 2017)

Coppard, S.E. & Lessios, H.A. (2017). Phylogeography of the sand dollar genus Encope: implications regarding the Central American Isthmus and rates of molecular evolution. <em>Scientific Reports.</em> 7(1): 11520.