Thorunna speciosus
Rudman, 1990

Suborder: DORIDINA
Family: Chromodorididae


Known only from Port Stephens, New South Wales, Australia.


Halifax Point, Port Stephens, NSW, 19 Jan 1987. (AM C152378).
Photo: Bill Rudman.

• Rudman, W.B. (1990) The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: further species of Glossodoris, Thorunna and the Chromodoris aureomarginata colour group. Zoological Journal of the Linnean Society 100: 263-326.

Authorship details
Rudman, W.B., 1998 (April 13) Thorunna speciosus Rudman, 1990. [In] Sea Slug Forum. Australian Museum, Sydney. Available from

Related messages

Thorunna speciosus from Okinawa

April 13, 1998
From: Robert F. Bolland

Dear Bill:

The sea slug forum is a terrific idea and I'm very impressed with everything I've seen at the site.

Here is one of two .jpg files of separate Thorunna(?) species from here on Okinawa. I'm afraid that both of the photos are of very poor quality, but thought there might be enough here for at least a tentative identification(?).

Thorunna species #2 (TL: 8mm) was collected on 27 April, 1995 from Seragaki, Okinawa. It was found at 3m on the underside of a slab of coral rubble in an area composed primarily of mixed silty-sand/coral rubble. This looks very similar to your T. speciosus. This is the only one I've seen here as well.

Robert F. Bolland

Robert F. Bolland , 1998 (Apr 13) Thorunna speciosus from Okinawa. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Your animal certainly looks very similar, but the broad whitish band around the edge of the foot wasn't present in Australian material. The only way to be certain would be to look at the internal anatomy and to look at a series of animals to see just how much colour variation there is. As with Thorunna montrouzieri, if yours is the same species then it is an extensive increase in its known distribution....Bill Rudman

Rudman, W.B., 1998 (Apr 13). Comment on Thorunna speciosus from Okinawa by Robert F. Bolland . [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from