Thorunna speciosa is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Chromodorididae.Rosenberg, G. (2012). Thorunna speciosa Rudman, 1990. In: MolluscaBase (2017). Accessed through: World Register of Marine Species on 2017-07-16.

Distribution This species was described from Halifax Point, Port Stephens, New South Wales, Australia.Rudman, W.B., 1998 (April 13) Thorunna speciosus Rudman, 1990. [In] Sea Slug Forum. Australian Museum, Sydney.

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