Published online by Cambridge University Press: 06 April 2009
1. Four species had been described to date as belonging to the genus Catoptroides: C. spatula and C. spatulaeforme from African catfish and C. macrocotyle and C. angulatus from European fish.
2. C. lacustri, a new species described in this paper, was taken from the great fork-tailed catfish, Ameiurus lacustris, from the St Croix River, Minnesota.
3. To this list must be added C. staffordi of the American catfish, Ameiurus nebulosus and A. melas, which was described by Pearse in 1924 and placed in the genus Phyllodistomum.
4. C. angulatus is shown not to be a member of this genus, but rather as belonging to the genus Phyllodistomum in which von Linstow first described it.
5. All of these species are briefly reviewed and compared in this paper.