Throughout New Zealand, apparently endemic.
Locality: Aha Aha Rocks, The Noisies, Hauraki Gulf, New Zealand. 12 m. 9 March 1975. coll R.C. Willan. Photo: M.C.Miller
Body generally translucent white with the brown and cream parts of the viscera showing through the body wall. The edges of the rhinophoral lamellae, oral tentacles and gills and paired dorsal processes are lightly speckled with opaque white pigment, and the paired processes have a yellow line along their upper surface.
Miller, M.C. (1981) Trapania rudmani, a new dorid nudbranch (Gastropoda: Opisthobranchia) from New Zealand. New Zealand Journal of Zoology, 8: 5-9.
Rudman, W.B., 2002 (February 9) Trapania rudmani Miller, 1981. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/traprudm