1. Jauberticeras
    [Jauberticeras jaubertianus]
  2. Jeletzkytes
    [Jeletzkytes nebrascensis (m)]
  3. Jeletzkytes
    [Jeletzkytes nebrascensis (M)]
  4. Jimboiceras
    [Jimboiceras (?) sp.]
  5. Jouaniceras
    [Jouaniceras (J.) sicardi]