Dipleurula
![Diagrammatic reconstruction of Dipleurula from Encyclopædia Britannica, 1911. The creature is represented crawling on the sea-floor, but it may equally well have been a floating animal. The ciliated bands are not drawn.](/Images/godic/202501/09/Britannica_Echinoderma_65821.jpg")
Dipleurula is a hypothetical larva of the Echinoderms. It represents the type of basis of all larva forms of the Eleutherozoa, to which the sea-stars, sea-hedgehog, sea-rollers and sand stars belong. The Dipleurula is a bilaterally symmetrical, ciliated echinoderm larva.