acuticostatum, Eubostrychoceras acuticostatum (D'Orbigny, 1842) † (FOSSIL)
alternatus, Nostoceras alternatus (Tuomey, 1854) † (FOSSIL)
amapondense, Madagascarites amapondense Van Hoepen, 1921 † (FOSSIL)
angolaense, Didymoceras angolaense Haughton, 1924 † - syn of: Nostoceras rotundum Howarth, 1965 † (FOSSIL)
angolanum, Axonoceras angolanum Haas, 1943 † (FOSSIL)
angolense, Nostoceras angolense Hyatt, 1894 † (FOSSIL)
angulatum, Didymoceras angulatum (Meek & Hayden, 1860) † (FOSSIL)
approximans, Nostoceras approximans (Conrad, 1855) † (FOSSIL)
archiacianum, Nostoceras archiacianum (D'Orbigny, 1842) † (FOSSIL)
arkanasanum, Nostoceras arkanasanum Kennedy & Cobban, 1993 † (FOSSIL)
arkansanum, Nostoceras arkansanum Kennedy & Cobban, 1993 † (FOSSIL)
attenuatum, Nostoceras attenuatum Brunnschweiler, 1966 † (FOSSIL)
aurarium, Didymoceras aurarium Cobban, Kennedy & Scott, 2000 † (FOSSIL)
aurarium, Didymoceras aurarium Kennedy & al., 2000 † (FOSSIL)
awajiense, Didymoceras awajiense Yabe, 1901 † (FOSSIL)
beecheri, Didymoceras beecheri Hyatt, 1894 † - syn of: Didymoceras nebrascense (Meek & Hayden, 1856) † (FOSSIL)
binodosum, Didymoceras binodosum (Kennedy & Cobban, 1993) † (FOSSIL)
binodosum, Didymoceratoides binodosum Kennedy & Cobban, 1993 † - syn of: Didymoceras binodosum (Kennedy & Cobban, 1993) † (FOSSIL)
boulei, Eubostrychoceras otsukai boulei Collignon (FOSSIL)
budanyi, Nostoceras budanyi Hyatt, 1894 † (FOSSIL)
californicum, Didymoceras californicum Anderson, 1958 † (FOSSIL)
camacki, Exiteloceras jenneyi camacki Kennedy, Landman, Cobban & Scott (FOSSIL)
cheyenense, Didymoceras cheyenense Meek & Hayden, 1856 † - syn of: Didymoceras cheyennense (Meek & Hayden, 1856) † (FOSSIL)
cheyennense, Didymoceras cheyennense (Meek & Hayden, 1856) † (FOSSIL)
clardyi, Didymoceras clardyi Cobban & Kennedy, 1993 † (FOSSIL)
cochleatus, Didymoceras cochleatus (Meek & Hayden, 1858) † (FOSSIL)
colubriformis, Nostoceras colubriformis Stephenson, 1941 † (FOSSIL)
conradi, Cirroceras conradi (Morton, 1841) † (FOSSIL)
danei, Nostoceras danei Kennedy & Cobban, 1993 † (FOSSIL)
donezianum, Didymoceras donezianum Michailov, 1951 † (FOSSIL)
draconis, Nostoceras draconis Stephenson, 1941 † (FOSSIL)
ellipticum, Nostoceras ellipticum Hyatt, 1894 † (FOSSIL)
etequense, Exiteloceras etequense Lewy, 1969 † (FOSSIL)
fischeri, Nostoceras fischeri Brunnschweiler, 1966 † (FOSSIL)
gordiale, Anaklinoceras gordiale Cobban, Kennedy & Scott, 1992 † (FOSSIL)
helicinus, Nostoceras helicinus (Shumard, 1861) † (FOSSIL)
hetonaiense, Nostoceras hetonaiense Matsumoto, 1977 † (FOSSIL)
hidakense, Didymoceras hidakense Shigeta, 2016 † (FOSSIL)
hornbyense, Didymoceras hornbyense (Whiteaves, 1876) † (FOSSIL)
hyatti, Nostoceras hyatti Stephenson, 1941 † (FOSSIL)
hystriculum, Helicoceras hystriculum White, 1887 † (FOSSIL)
incertum, Anaklinoceras incertum Cobban, Kennedy & Scott, 2000 † (FOSSIL)
indopacificum, Eubostrychoceras indopacificum Matsumoto, 1967 † (FOSSIL)
irregulare, Nostoceras irregulare Cobban & Kennedy, 1995 † (FOSSIL)
japonicum, Eubostrychoceras japonicum (Yabe, 1904) † (FOSSIL)
jenneyi, Exiteloceras jenneyi (Whitfield, 1877) † (FOSSIL)
jenneyi camacki, Exiteloceras jenneyi camacki Kennedy, Landman, Cobban & Scott, 2000 † (FOSSIL)
jorgenseni, Didymoceras jorgenseni Cobban, Kennedy & Scott, 2000 † (FOSSIL)
kamuyi, Ainoceras kamuyi Matsumoto, 1967 † (FOSSIL)
kernense, Nostoceras kernense Anderson, 1958 † (FOSSIL)
larimerense, Nostoceras larimerense Cobban, Kennedy & Scott, 2000 † (FOSSIL)
major, Nostoceras major Kennedy & Cobban, 1993 † (FOSSIL)
malagasyense, Nostoceras malagasyense (Collignon, 1971) † (FOSSIL)
mariatheresianum, Nostoceras mariatheresianum Haas, 1943 † (FOSSIL)
matsumotoi, Eubostrychoceras matsumotoi Cobban, 1987 † (FOSSIL)
mendryki, Nostoceras mendryki Cobban, 1974 † (FOSSIL)
minutum, Anaklinoceras minutum Cobban, Kennedy & Scott, 2000 † (FOSSIL)
minutum, Anaklinoceras minutum Kennedy & al., 2000 † (FOSSIL)
monotuberculatum, Nostoceras monotuberculatum Kennedy & Cobban, 1993 † (FOSSIL)
navarroensis, Didymoceras navarroensis (Shumard, 1861) † (FOSSIL)
nebrascense, Didymoceras nebrascense (Meek & Hayden, 1856) † (FOSSIL)
newtoni, Didymoceras newtoni (Whitfield, 1877) † (FOSSIL)
nicolletii, Didymoceras nicolletii (Hall & Meek, 1856) † (FOSSIL)
obtusum, Nostoceras obtusum Howarth, 1965 † (FOSSIL)
oshimai, Hyphantoceras oshimai (Yabe, 1904) † (FOSSIL)
otsukai, Eubostrychoceras otsukai (Yabe, 1904) † (FOSSIL)
otsukai boulei, Eubostrychoceras otsukai boulei (Collignon, 1932) † (FOSSIL)
pauper, Nostoceras pauper (Whitfield, 1892) † (FOSSIL)
platycostatum, Didymoceras platycostatum Kennedy & Cobban, 1993 † (FOSSIL)
plerucostatum, Nostoceras plerucostatum Kennedy & Cobban, 1993 † (FOSSIL)
pleurocostatum, Nostoceras pleurocostatum Kennedy & Cobban, 1993 † (FOSSIL)
plicatum, Hyphantoceras plicatum (D'Orbigny, 1842) † (FOSSIL)
polyplocum, Bostrychoceras polyplocum (Roemer, 1841) † (FOSSIL)
puebloense, Didymoceras puebloense Cobban, Kennedy & Scott, 1997 † (FOSSIL)
pulcher, Nostoceras pulcher Kennedy & Cobban, 1993 † (FOSSIL)
puzosiforme, Nostoceras puzosiforme Kennedy & Cobban, 1994 † (FOSSIL)
reflexum, Anaklinoceras reflexum Stephenson, 1941 † (FOSSIL)
reussianum, Hyphantoceras reussianum (D'Orbigny, 1850) † (FOSSIL)
rotundum, Nostoceras rotundum Howarth, 1965 † (FOSSIL)
rugosum, Nostoceras rugosum Cobban & Kennedy, 1991 † (FOSSIL)
sakakibarai, Morewites sakakibarai Shigeta, 2014 † (FOSSIL)
saundersorum, Nostoceras saundersorum Stephenson, 1941 † (FOSSIL)
saxonicum, Eubostrychoceras saxonicum (Schluter, 1875) † (FOSSIL)
scalare, Helicoceras scalare Yabe, 1904 † - syn of: Scalarites scalaris (Yabe, 1904) † (FOSSIL)
schloenbachi, Nostoceras schloenbachi (Favre, 1869) † (FOSSIL)
secoense, Bostrychoceras secoense Young, 1963 † - syn of: Bostrychoceras polyplocum (Roemer, 1841) † (FOSSIL)
sicardi, Jouaniceras sicardi (Grossouvre, 1894) † (FOSSIL)
simplicostatum, Emperoceras simplicostatum Whitfield, 1902 † - syn of: Didymoceras nebrascense (Meek & Hayden, 1856) † (FOSSIL)
sohli, Axonoceras sohli Cobban, 1974 † (FOSSIL)
splendidus, Nostoceras splendidus (Shumard, 1861) † (FOSSIL)
stantoni, Nostoceras stantoni Hyatt, 1894 † (FOSSIL)
stevensoni, Didymoceras stevensoni (Whitfield, 1877) † (FOSSIL)
subtuberculatum, Didymoceras subtuberculatum Howarth, 1965 † (FOSSIL)
tenuicostatum, Anaklinoceras tenuicostatum Kennedy & Cobban, 1994 † (FOSSIL)
tenuicostatus, Didymoceras tenuicostatus (Meek & Hayden, 1858) † (FOSSIL)
tortus, Didymoceras tortus (Meek & Hayden, 1858) † (FOSSIL)
tricostatus, Didymoceras tricostatus (Whitfield, 1897) † (FOSSIL)
umbilicatus, Didymoceras umbilicatus (Meek & Hayden, 1858) † (FOSSIL)
uncus, Didymoceras uncus (Meek & Hayden, 1858) † (FOSSIL)
venezolanus, Ankinatsytes venezolanus Renz, 1982 † (FOSSIL)
venustum, Helicoceras venustum Yabe, 1904 † (FOSSIL)
vespertinus, Didymoceras vespertinus (Conrad, 1874) † (FOSSIL)
wrighti, Didymoceras wrighti Cobban, Kennedy & Scott, 2000 † (FOSSIL)
yabei, Ankinatsytes yabei Collignon, 1965 † (FOSSIL)
zulu, Eubostrychoceras zulu Klinger & Kennedy, 2003 † (FOSSIL)
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