1, 3, 5 holotype of Phyllidia monacha, NHMUK 1985205 2, 4, 6 specimen of Phyllidiopsis dautzenbergi, NHMUK 20210058, illustrated here as it was not figured by Yonow (1986). This is also the specimen that was dissected by Brunckhorst (1993) but clearly he did not dissect Phyllidia monacha. 1, 2 dorsal views 3, 4 ventral views 5, 6 close-up views of the anterior foot margins. Scale bar: 5 mm (1–4); 10 mm (5, 6).