| Abstract: | All the known Red Sea nudibranchs of the family Phyllidiidae are described and their taxonomic positions discussed. The genus Fryeria Gray, 1853, is regarded as a junior subjective synonym of Phyllidia Cuvier, 1797, and Reyfria gen. nov. is introduced to describe those species differing from Phyllidia primarily in the position of the anus. Of 12 species described here from the Red Sea, four are new to science. Phyllidia arabica Ehrenberg, 1831, is distinguished from Phyllidia varicosa Lamarck, 1801, and Phyllidia sp. is described as the third species confused with this group. A subspecies of P. ocellata Cuvier, 1804, is described and illustrated, as are three new species: P. melanocera, P. monacha and P. multifaria. |
