Order : NUDIBRANCHIA
Suborder : EUCTENIDIACEA
Infraorder : DORIDACEA
Superfamily : PHYLLIDIOIDEA
Family : Phyllidiidae
Known only from southern Thailand (Andaman Sea, north-eastern Indian Ocean).
Notes compiled from Brunckhorst, 1993:
Phyllidiopsis phiphiensis has the following distinctive external characteristics: two low, white ridges separated by three furrows lined with black; white mantle margin with black spots; white rhinophores; and white ventral coloration with black spots on the margin of the hyponotum and on the side of the foot.
There are three other, small, longitudinally striped species of Phyllidiopsis. Two of these, Phyllidiopsis annae and Phyllidiopsis sphingis, are easily separated from the present species because they possess blue pigmentation, grey gills and black (P. annae) or pale yellow (P. sphingis) rhinophores. Phyllidiopsis striata is less easily separated. However, P. striata has three low, white ridges and four black bands (two white ridges and three black bands in P. phiphiensis), lemon yellow rhinophores, and grey and black ventral coloration.