Helicoceras Weithofer, 1888 † accepted as Prostrepsiceros Major, 1891 † (verified source for family)
Helicophora Weithofer, 1889 † accepted as Prostrepsiceros Major, 1891 † (verified source for family)
Helicotragus Palmer, 1903 † accepted as Prostrepsiceros Major, 1891 † (source of synonymy)
Helicotragus Palmer, 1903 † accepted as Prostrepsiceros Major, 1891 † (verified source for family)
Prostrepsiceros Major, 1891 † (verified source for family)
Prostrepsiceros Major, 1891 † (current name source)