Diaulula aurila is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Discodorididae.Camacho-García Y. & Valdés A. (2003). "Caryophyllidia-bearing dorid nudibranchs (Mollusca, Nudibranchia, Doridacea) from Costa Rica". Proceedings of the California Academy of Sciences 54: 65-79. PDF. References