Anaklinoceras
tenuicostatum
J. Kennedy & Cobban, 1994 †
(FOSSIL)

Anaklinoceras
minutum
J. Kennedy & al., 2000 †
(FOSSIL)

Anaklinoceras
gordiale
Cobban, Kennedy & Scott, 1992 †
(FOSSIL)

Anaklinoceras
incertum
Cobban, Kennedy & Scott, 2000 †
(FOSSIL)

Anaklinoceras
minutum
Cobban, Kennedy & Scott, 2000 †
(FOSSIL)

Ankinatsytes
yabei
M. Collignon, 1965 †
(FOSSIL)

Axonoceras
sohli
Cobban, 1974 †
(FOSSIL)

Bostrychoceras
awajiense
Yabe, 1901 †
(FOSSIL)

Didymoceras
binodosum
(J. Kennedy & Cobban, 1993 †)
(FOSSIL)

Didymoceras
californicum
Anderson, 1958 †
(FOSSIL)

Didymoceras
cheyennense
(F.B. Meek & Hayden, 1856 †)
(FOSSIL)

Didymoceras
cochleatus
(F.B. Meek & Hayden, 1858 †)
(FOSSIL)

Didymoceras
donezianum
Michailov, 1951 †
(FOSSIL)

Didymoceras
hornbyense
(J.J.F. Whiteaves, 1876 †)
(FOSSIL)

Didymoceras
navarroensis
(Shumard, 1861 †)
(FOSSIL)

Didymoceras
nebrascense
(F.B. Meek & Hayden, 1856 †)
(FOSSIL)

Didymoceras
newtoni
(R.P. Whitfield, 1877 †)
(FOSSIL)

Didymoceras
nicolletii
(J.W. Hall & F.B. Meek, 1856 †)
(FOSSIL)

Didymoceras
platycostatum
J. Kennedy & Cobban, 1993 †
(FOSSIL)

Didymoceras
stevensoni
(R.P. Whitfield, 1877 †)
(FOSSIL)

Didymoceras
subtuberculatum
Howarth, 1965 †
(FOSSIL)

Didymoceras
tenuicostatus
(F.B. Meek & Hayden, 1858 †)
(FOSSIL)

Didymoceras
tortus
(F.B. Meek & Hayden, 1858 †)
(FOSSIL)

Didymoceras
tricostatus
(R.P. Whitfield, 1897 †)
(FOSSIL)

Didymoceras
umbilicatus
(F.B. Meek & Hayden, 1858 †)
(FOSSIL)

Didymoceras
uncus
(F.B. Meek & Hayden, 1858 †)
(FOSSIL)

Didymoceras
vespertinus
(T.A. Conrad, 1874 †)
(FOSSIL)

Didymoceras
angolaense
S.H. Haughton, 1924 †
(FOSSIL)

Didymoceras
aurarium
J. Kennedy & al., 2000 †
(FOSSIL)

Didymoceras
awajiense
Yabe, 1901 †
(FOSSIL)

Didymoceras
hidakense
Y. Shigeta, 2016 †
(FOSSIL)

Didymoceras
aurarium
Cobban, Kennedy & Scott, 2000 †
(FOSSIL)

Didymoceras
clardyi
Cobban & Kennedy, 1993a †
(FOSSIL)

Didymoceras
jorgenseni
Cobban, Kennedy & Scott, 2000 †
(FOSSIL)

Didymoceras
puebloense
Cobban, Kennedy & Scott, 1997 †
(FOSSIL)

Didymoceras
wrighti
Cobban, Kennedy & Scott, 2000 †
(FOSSIL)

Eubostrychoceras
saxonicum
(Schluter, 1875 †)
(FOSSIL)

Eubostrychoceras
matsumotoi
Cobban, 1987 †
(FOSSIL)

Eubostrychoceras
zulu
Klinger & J. Kennedy, 2003 †
(FOSSIL)

Eubostrychoceras
japonicum
(Yabe, 1904 †)
(FOSSIL)

Eubostrychoceras
otsukai
(Yabe, 1904 †)
(FOSSIL)

Eubostrychoceras
otsukai
(M. Collignon, 1932 †)
(FOSSIL)

Eubostrychoceras
acuticostatum
(A.V.M.D. D'Orbigny, 1842 †)
(FOSSIL)

Exiteloceras
etequense
Lewy, 1969 †
(FOSSIL)

Exiteloceras
jenneyi
J. Kennedy, Landman, Cobban & P.H. Scott, 2000 †
(FOSSIL)

Helicoceras
scalare
Yabe, 1904 †
(FOSSIL)

Helicoceras
venustum
Yabe, 1904 †
(FOSSIL)

Hyphantoceras
amapondense
Van Hoepen, 1921 †
(FOSSIL)

Hyphantoceras
plicatum
(A.V.M.D. D'Orbigny, 1842 †)
(FOSSIL)

Hyphantoceras
oshimai
(Yabe, 1904 †)
(FOSSIL)

Hyphantoceras
amapondense
Van Hoepen, 1921 †
(FOSSIL)

Hyphantoceras
plicatum
(A.V.M.D. D'Orbigny, 1842 †)
(FOSSIL)

Hyphantoceras
oshimai
(Yabe, 1904 †)
(FOSSIL)

Jouaniceras
sicardi
(Grossouvre, 1894 †)
(FOSSIL)

Jouaniceras
sicardi
(Grossouvre, 1894 †)
(FOSSIL)

Nostoceras
attenuatum
Brunnschweiler, 1966 †
(FOSSIL)

Nostoceras
fischeri
Brunnschweiler, 1966 †
(FOSSIL)

Nostoceras
major
J. Kennedy & Cobban, 1993 †
(FOSSIL)

Nostoceras
schloenbachi
(J. Favre, 1869 †)
(FOSSIL)

Nostoceras
alternatus
(M. Tuomey, 1854 †)
(FOSSIL)

Nostoceras
approximans
(T.A. Conrad, 1855 †)
(FOSSIL)

Nostoceras
arkanasanum
J. Kennedy & Cobban, 1993 †
(FOSSIL)

Nostoceras
colubriformis
L.W. Stephenson, 1941 †
(FOSSIL)

Nostoceras
danei
J. Kennedy & Cobban, 1993 †
(FOSSIL)

Nostoceras
draconis
L.W. Stephenson, 1941 †
(FOSSIL)

Nostoceras
helicinus
(Shumard, 1861 †)
(FOSSIL)

Nostoceras
hyatti
L.W. Stephenson, 1941 †
(FOSSIL)

Nostoceras
kernense
F.M. Anderson, 1958 †
(FOSSIL)

Nostoceras
mariatheresianum
F. Haas, 1943 †
(FOSSIL)

Nostoceras
mendryki
Cobban, 1974 †
(FOSSIL)

Nostoceras
monotuberculatum
J. Kennedy & Cobban, 1993 †
(FOSSIL)

Nostoceras
obtusum
Howarth, 1965 †
(FOSSIL)

Nostoceras
pauper
(R.P. Whitfield, 1892 †)
(FOSSIL)

Nostoceras
pleurocostatum
J. Kennedy & Cobban, 1993 †
(FOSSIL)

Nostoceras
pulcher
J. Kennedy & Cobban, 1993 †
(FOSSIL)

Nostoceras
rotundum
Howarth, 1965 †
(FOSSIL)

Nostoceras
saundersorum
L.W. Stephenson, 1941 †
(FOSSIL)

Nostoceras
splendidus
(Shumard, 1861 †)
(FOSSIL)

Nostoceras
stantoni
A. Hyatt, 1894 †
(FOSSIL)

Nostoceras
malagasyense
(M. Collignon, 1971 †)
(FOSSIL)

Nostoceras
hetonaiense
E. Matsumoto, 1977 †
(FOSSIL)

Nostoceras
angolense
A. Hyatt 1894 †
(FOSSIL)

Nostoceras
budanyi
A. Hyatt 1894 †
(FOSSIL)

Nostoceras
ellipticum
A. Hyatt 1894 †
(FOSSIL)

Nostoceras
arkansanum
Kennedy & Cobban, 1993b †
(FOSSIL)

Nostoceras
irregulare
Cobban & Kennedy, 1995 †
(FOSSIL)

Nostoceras
larimerense
Cobban, Kennedy & Scott, 2000 †
(FOSSIL)

Nostoceras
plerucostatum
Kennedy & Cobban, 1993 †
(FOSSIL)

Nostoceras
puzosiforme
Kennedy & Cobban, 1994 †
(FOSSIL)

Nostoceras
rugosum
Cobban & Kennedy, 1991 †
(FOSSIL)