Aldisa sp. 2.
at Heron Island, Great Barrier Reef, Queensland, Australia, 30 mm long, September 1994. PHOTO: Julie Marshall.
The major characteristics of this species are the regularly spaced low pustules on the dorsum, each of which has a black centre, and the two large pits, one behind the rhinophores and the other immediately in front of the gills (see enlargement). It also has two transverse lines of white speckles, sometimes fused, between the rhinophores and gills and these lines vary in their intensity between individuals.
In colour this species resembles both Aldisa sanguinea and A. pikokai but both these species are a paler red and neither species has pustules with black centres.
See message below.Authorship details
Marshall, J., 1999 (October 19) Aldisa sp. 2. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/aldisp2