 Subsequently, in 1816 Georges Cuvier used "Galeus" to refer to the genus presently known as "Galeorhinus", and in 1818 William Elford Leach used "Galeus" to refer to genus presently known as "Mustelus".As a result, 19th century authors generally used "Galeus" for the tope sharks, and "Pristiurus", coined by Charles Lucien Bonaparte in 1834, for the sawtail catsharks.Rafinesque might have intended "G. mustelus" to be the type species for "Galeus", but of his listed species he furnished a description only for "G. melastomus".