This note provides photographs of thin sections and cellulose peels prepared from the syntypes figured by Goldfuss (1826) of Cyathophyllum flexuosum Goldfuss, the type species by original designation of Campophyllum Edwards and Haime, 1850. It is concluded that C. flexuosum is not a disphyllid, and that Campophyllum may be maintained as a genus distinct from Caninia, Caninophyllum, and Palaeosmilia. For the present it is placed alone in the family Campophyllidae Wedekind, 1932.