Published online by Cambridge University Press: 11 May 2009
The monogenean gill parasites from Scyliorhinus canicula and S. stellaris at Plymouth have been found to be identical; their proper taxonomic designation is Hexabothrium appendiculatum (Kuhn, 1829) Nordmann, 1832. H. canicula (Cerfontaine, 1899) Price, 1942 is a synonym of H. appendiculatum.
The hexabothriid collected from Raia clavata at Plymouth has been identified as Rajonchocotyle emarginata (Olsson, 1876) Sproston, 1946, and R. clavata Bracey (in Sproston, 1946) has been shown to be synonymous with it.