Thordisa villosa
(Alder & Hancock, 1864)

Suborder: DORIDINA
Family: Dorididae


Indo-West Pacific


Koumac, New Caledonia, 2m, October 1993, 70mm long alive. PHOTO: Bill Rudman.

The dorsum is translucent yellow with a characteristic pattern of dark brown patches around the mantle edge, while the underside is a bright orange yellow with small brown spots on the underside of the mantle and the sides of the foot. The dorsum is tuberculate and some of the larger tubercles have a long tapering fluid filled papillae.

• Alder, J. & Hancock, A. (1864). Notice of a collection of nudibranchiate mollusca made in India by Walter Elliot Esq., with descriptions of several new genera and species. Transactions of the Zoological Society of London, 5: 113-147.

Authorship details
Rudman, W.B., 1999 (January 13) Thordisa villosa (Alder & Hancock, 1864). [In] Sea Slug Forum. Australian Museum, Sydney. Available from

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