Nepotilla marmorata is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Daphnella marmorata <small>(Verco, 1909)</small> is a junior homonym of Daphnella marmorata <small>Hinds, 1844</small>
Joseph Verco (1909) and J.K. Tucker (2004) considered this species as a variety of Nepotilla minuta. Verco described it as beautifully marbled with flames of white and deep blackish-brown.
Charles Hedley (1922) considered it as a variety of Nepotilla mimica
This marine species is endemic to Australia and occurs off New South Wales, South Australia and Tasmania