Identification Key to the Phyllidiids of the Indo-Pacific Ocean
According to morphological and anatomical features
Thanks to Alexander Fahrner and Lothar A. Beck

17. Very large species (up to 100 mm in length). Distinctive body shape caused by a middorsal crest (i.e. body not dorsoventrally flattened). Dorsum pale pink with a few black lines. Rhinophores uniformly pale pink. - Phyllidiopsis shireenae Brunckhorst, 1989

- Very small species (5-26 mm in length). Body dorsoventrally flattened, without middorsal crest. dorsum black and white, with pattern of large, round black spots or of white semicircles along the mantle margin. Rhinophores white. - 18