Allotrioceras Flower, 1955 † (original description)
Cambrophyllum Fritz & Howell, 1955 † (original description)
Ctenalosia Cooper & Stehli, 1955 † (original description)
Dorfopterus Kjellesvig-Waering, 1955 † (original description)
Fenestrirostra Cooper, 1955 † (original description)
Gallatinospongia Okulitch & Bell, 1955 † (original description)
Hermanites Puri, 1955 (original description)
Highgatella Shaw, 1955 † (original description)
Machaeraria Cooper, 1955 † (original description)
Maclarenella Stehli, 1955 † (original description)
Mesnaquaceras Flower, 1955 † (original description)
Mirabiloceras Flower, 1955 † (original description)
Mixoconus Sweet, 1955 † (original description)
Monelasmina Cooper, 1955 † (original description)
Nanochoerus Macdonald, 1955 † (original description)
Notospirifer Harrington, 1955 † (original description)
Orthothyris Cooper, 1955 † (original description)
Paradoxiella Skinner & Wilde, 1955 † (original description)
Paraterebella Howell, 1955 † accepted as Terebellopsis Howell, 1953 † (original description)
Pegmarhynchia Cooper, 1955 † (original description)
Phalagnostus Howell, 1955 † (original description)
Phragmophora Cooper, 1955 † (original description)
Phragmothyris Cooper, 1955 † (original description)
Pipiograptus Whittington, 1955 † (original description)
Porostictia Cooper, 1955 † (original description)
Proendoceras Flower, 1955 † (original description)
Proteoceras Flower, 1955 † (original description)
Reticulophragmium Maync, 1955 (original description)
Schizotheriodes Hough, 1955 † accepted as Schizotheroides Hough, 1955 † (original description)
Spyridiophora Cooper & Stehli, 1955 † (original description)
Stereospyroceras Flower, 1955 † (original description)
Tesnusocaris Brooks, 1955 † (original description)
Tyrrhenocythere Ruggieri, 1955 (original description)
Yoderimys Wood, 1955 † (original description)