Alpheiceras Cossmann, 1900 † accepted as Anomaloceras Hyatt, 1883 † (original description)
Amoeloceras Cossmann, 1900 † accepted as Amoeboceras Hyatt in Eastman-Zittel, 1900 † (original description)
Aveniona Cossmann, 1900 accepted as Avenionia Nicolas, 1882 (original description)
Avenonia Cossmann, 1900 accepted as Avenionia Nicolas, 1882 (original description)
Bostrycoceras Cossmann, 1900 † (original description)
Chilea Cossmann, 1900 accepted as Cheilea Modeer, 1793 (original description)
Cnemidoceras Haug, 1900 † accepted as Knemiceras Böhm, 1898 † (original description)
Cnemioceras Haug, 1900 † accepted as Knemiceras Böhm, 1898 † (original description)
Conradiceras Cossmann, 1900 † accepted as Coelogasteroceras Hyatt, 1892 † (original description)
Garrettia Cossmann, 1900 † (original description)
Haugiceras Cossmann, 1900 † (original description)
Hemiphraygmoceras Cossmann, 1900 † accepted as Hemiphragmoceras Hyatt in Eastman-Zittel, 1900 † (original description)
Hoylia Cossmann, 1900 accepted as Histioteuthis d'Orbigny [in Férussac & d'Orbigny], 1841 (original description)
Hyatticeras Cossmann, 1900 † (original description)
Joanisiella Cossmann, 1900 † (original description)
Lybicoceras Haug, 1900 † accepted as Libycoceras Hyatt in Eastman-Zittel, 1900 † (original description)
Neiococeras Cossmann, 1900 † accepted as Neoicoceras Hyatt in Eastman-Zittel, 1900 † (original description)
Oppenheimia Cossmann, 1900 † accepted as Atelospatangus Koch, 1885 † (original description)
Paracrostoma Cossmann, 1900 † (original description)
Parastilbe Cossmann, 1900 (original description)
Poecilostiella Cossmann, 1900 † accepted as Poecilomorphus Buckman, 1889 † (original description)
Porcupinia Cossmann, 1900 accepted as Cirsonella Angas, 1877 (original description)
Projovelliana Cossmann, 1900 † accepted as Projovellania Hyatt in Eastman-Zittel, 1900 † (original description)
Rhetites Cossmann, 1900 † (original description)
Rhinocloma Cossmann, 1900 accepted as Rhinoclama Dall & E. A. Smith, 1886 (original description)
Tornentoceras Cossmann, 1900 † (original description)
Vinassaia Cossmann, 1900 † (original description)