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abaeratum, Almaloceras abaeratum Zhuravleva, 1974 † (FOSSIL)
abbreviatum, Pachtoceras abbreviatum (Gurich, 1901) † (FOSSIL)
aduncum, Cyrtoceras aduncum Barrande, 1866 † - syn of: Sthenoceras aduncum (Barrande, 1866) † (FOSSIL)
alinae, Cyrtoceras alinae Barrande, 1866 † - syn of: Digenuoceras alinae (Barrande, 1866) † (FOSSIL)
alternans, Cyrtoceras alternans (Tietze, 1870) † (FOSSIL)
amoenum, Cyrtoceras amoenum Miller, 1879 † - syn of: Beloitoceras amoenum (Miller, 1879) † (FOSSIL)
annulatum, Gyroceras annulatum Barrande † (FOSSIL)
baffinensis, Cyrtoceras baffinensis Schuchert, 1900 † - syn of: Beloitoceras baffinense (Schuchert, 1900) † (FOSSIL)
balaschovi, Antonoceras balaschovi Shimanskiy, 1957 † (FOSSIL)
beaumonti, Cyrtoceras beaumonti Barrande, 1866 † - syn of: Protophragmoceras beaumonti (Barrande, 1866) † (FOSSIL)
billingsi, Cyrtoceras billingsi (Salter, 1859) † (FOSSIL)
billingsi, Cyrtoceras billingsi Clarke, 1897 † - syn of: Laphamoceras scofieldi (Foerste, 1932) † (FOSSIL)
billingsi, Cyrtoceras billingsi Foerste, 1932 † - syn of: Laphamoceras scofieldi (Foerste, 1932) † (FOSSIL)
bogoslovskyi, Pachtoceras bogoslovskyi Zhuravleva, 1972 † - syn of: Raphanites bogoslovskyi (Zhuravleva, 1972) † (FOSSIL)
borea, Balashovia borea Zhuravleva, 1974 † (FOSSIL)
boycii, Cyrtoceras boycii Whitfield, 1886 † - syn of: Ruedemannoceras boycii (Whitfield, 1886) † (FOSSIL)
bryozoon, Cyrtoceras bryozoon (Barrande, 1866) † (FOSSIL)
camurum, Cyrtoceras camurum (Hall, 1847) † (FOSSIL)
castor, Cyrtoceras castor (Barrande, 1866) † (FOSSIL)
circulare, Gyroceras circulare Barrande, 1865 † - syn of: Gyroceratites circularis Barrande, 1865 † (FOSSIL)
circumflexum, Cyrtoceras circumflexum Barrande † (FOSSIL)
concors, Cyrtoceras concors Barrande † (FOSSIL)
conspicuum, Cyrtoceras conspicuum Barrande, 1866 † - syn of: Protophragmoceras conspicuum (Barrande, 1866) † (FOSSIL)
corbulatum, Corbuloceras corbulatum (Barrande) † (FOSSIL)
cornulum, Cyrtoceras cornulum Schuchert, 1900 † - syn of: Beloitoceras cornulum (Schuchert, 1900) † (FOSSIL)
costulatum, Hiregiroceras costulatum Miagkova, 1967 † (FOSSIL)
crenatum, Talattoceras crenatum Miagkova † - syn of: Talattoceras inflatum Miagkova † (FOSSIL)
cyclostomum, Cyrtoceras cyclostomum (Barrande, 1866) † (FOSSIL)
ellipticum, Cyrtoceras ellipticum Sobolew, 1912 † (FOSSIL)
elongatum, Cyrtoceras elongatum Gurich, 1901 † (FOSSIL)
equisetum, Cyrtoceras equisetum (Blake, 1882) † (FOSSIL)
esuriens, Cyrtoceras esuriens (Barrande, 1866) † (FOSSIL)
evlanensis, Pachtoceras evlanensis Zhuravleva, 1972 † - syn of: Evlanoceras evlanense (Nalivkin, 1947) † (FOSSIL)
featherstonhaughi, Cyrtoceras featherstonhaughi Clarke, 1897 † - syn of: Staufferoceras featherstonhaughi (Clarke, 1897) † (FOSSIL)
ficus, Sycoceras ficus (Roemer, 1850) † (FOSSIL)
forte, Cyrtoceras forte (Barrande, 1866) † (FOSSIL)
fracturn, Cyrtoceras fracturn Barrande, 1866 † - syn of: Sthenoceras fracturn (Barrande, 1866) † (FOSSIL)
fritschi, Gyroceras fritschi Barrande, 1877 † (FOSSIL)
galithkyi, Mnemoceras galithkyi Zhuravleva, 1974 † - syn of: Almaloceras abaeratum Zhuravleva, 1974 † (FOSSIL)
halli, Gyroceras halli Wedekind, 1908 † - syn of: Gonatocyrtoceras guerichi (Sobolev, 1912) † (FOSSIL)
hallianum, Cyrtoceras hallianum D'Orbigny † (FOSSIL)
heteroclytum, Cyrtoceras heteroclytum Barrande, 1866 † - syn of: Gonatocyrtoceras heteroclytum (Barrande, 1866) † (FOSSIL)
hiliferum, Edenoceras hiliferum Miagkova, 1967 † (FOSSIL)
hoernesi, Cyrtoceras hoernesi Barrande, 1865 † - syn of: Lechritrochoceras hoernesi (Barrande, 1865) † (FOSSIL)
houghtoni, Cyrtoceras houghtoni Clarke † - syn of: Beloitoceras houghtoni Clarke † (FOSSIL)
hyperboreum, Pachtoceras hyperboreum Zhuravleva, 1972 † (FOSSIL)
inelegans, Gyroceras inelegans Meek † - syn of: Heracloceras inelegans (Meek) † (FOSSIL)
inflatum, Talattoceras inflatum Miagkova † (FOSSIL)
inflatum, Apioceras inflatum Quenstedt † (FOSSIL)
inflectens, Cyrtoceras inflectens Barrande † (FOSSIL)
insperatum, Doleroceras insperatum Zhuravleva, 1974 † (FOSSIL)
karatauense, Corysoceras karatauense Zhuravleva, 1974 † - syn of: Almaloceras abaeratum Zhuravleva, 1974 † (FOSSIL)
kirbyi, Cyrtoceras kirbyi Whitfield, 1889 † - syn of: Bassleroceras kirbyi (Whitfield, 1889) † (FOSSIL)
kochyonense, Cyrtoceras kochyonense Kobayashi, 1928 † - syn of: Centrocyrtoceras kochyonense (Kobayashi, 1934) † (FOSSIL)
laeve, Cyrtoceras laeve Eichwald, 1857 † - syn of: Pollicina corniculum (Eichwald, 1860) † (FOSSIL)
lagowiense, Cyrtoceras lagowiense Gürich, 1896 † - syn of: Lysagoroceras lagoviense (Gürich, 1896) † (FOSSIL)
llandoveri, Cyrtoceras llandoveri Blake † (FOSSIL)
lysander, Cyrtoceras lysander Billings, 1865 † - syn of: Manitoulinoceras lysander (Billings, 1865) † (FOSSIL)
macrostomum, Cyrtoceras macrostomum Hall, 1847 † - syn of: Reedsoceras macrostomum (Hall, 1847) † (FOSSIL)
magister, Cyrtoceras magister Miller, 1875 † - syn of: Faberoceras magister (Miller, 1875) † (FOSSIL)
magnum, Cyrtoceras magnum (Blake, 1882) † (FOSSIL)
manitobense, Cyrtoceras manitobense Whiteaves, 1890 † - syn of: Westonoceras rnanitobense (Whiteaves, 1890) † (FOSSIL)
marginalis, Cyrtoceras marginalis Conrad, 1843 † - syn of: Reedsoceras macrostomum (Hall, 1847) † (FOSSIL)
maximus, Cyrtoceras maximus Conrad, 1838 † - syn of: Nephriticeras maximus (Conrad, 1838) † (FOSSIL)
medlicottianum, Gyroceras medlicottianum Waagen, 1879 † - syn of: Metacoceras medlicottianum (Waagen, 1879) † (FOSSIL)
minneapolis, Cyrtoceras minneapolis Clarke, 1897 † (FOSSIL)
mirum, Cyrtoceras mirum (Barrande, 1866) † (FOSSIL)
moestum, Cyrtoceras moestum Barrande, 1866 † - syn of: Sthenoceras moestum (Barrande, 1866) † (FOSSIL)
murchisoni, Cyrtoceras murchisoni Barrande, 1867 † - syn of: Protophragmoceras murchisoni (Barrande, 1867) † (FOSSIL)
neleus, Cyrtoceras neleus Hall † (FOSSIL)
nepotulus, Cyrtoceras nepotulus Barrande, 1877 † - syn of: Parauloceras pupus (Barrande, 1877) † (FOSSIL)
nobile, Cyrtoceras nobile Barrande, 1866 † - syn of: Sthenoceras nobile (Barrande, 1866) † (FOSSIL)
nodosocostatum, Gyroceras nodosocostatum Gemmellaro, 1889 † - syn of: Araxonautilus nodosocostatum (Gemmellaro, 1889) † (FOSSIL)
norwoodi, Cyrtoceras norwoodi Clarke, 1897 † (FOSSIL)
nudum, Gyroceras nudum Barrande, 1865 † (FOSSIL)
obesum, Cyrtoceras obesum (Barrande, 1866) † (FOSSIL)
obscura, Cyrtoceras obscura Miller, 1875 † - syn of: Faberoceras magister (Miller, 1875) † (FOSSIL)
occidentale, Cyrtoceras occidentale Whiteaves, 1890 † - syn of: Alpenoceras occidentale (Whiteaves, 1890) † (FOSSIL)
occultum, Lychnoceras occultum Zhuravleva, 1974 † - syn of: Almaloceras abaeratum Zhuravleva, 1974 † (FOSSIL)
parvum, Leonardoceras parvum Flower, 1968 † (FOSSIL)
patulum, Cyrtoceras patulum Barrande, 1866 † - syn of: Richardsonoceras patulum (Barrande, 1866) † (FOSSIL)
platygaster, Cyrtoceras platygaster Born, 1912 † - syn of: Gonatocyrtoceras guerichi (Sobolev, 1912) † (FOSSIL)
plebeium, Cyrtoceras plebeium Barrande, 1866 † - syn of: Oonoceras plebeium (Barrande, 1866) † (FOSSIL)
pollux, Cyrtoceras pollux (Barrande, 1866) † (FOSSIL)
priscum, Cyrtoceras priscum Eichwald, 1861 † - syn of: Oonoceras priscum (Eichwald, 1861) † (FOSSIL)
pristis, Balashovia pristis Zhuravleva, 1974 † (FOSSIL)
pugio, Cyrtoceras pugio (Barrande, 1868) † (FOSSIL)
pumilum, Neoceras pumilum Miagkova, 1967 † (FOSSIL)
resimum, Doleroceras resimum Zhuravleva, 1972 † (FOSSIL)
reversum, Cyrtoceras reversum (Blake, 1882) † (FOSSIL)
robertsii, Cyrtoceras robertsii Whidborne † (FOSSIL)
rotundum, Pachtoceras rotundum Pacht † (FOSSIL)
salairica, Balashovia salairica (Balaschov, 1955) † (FOSSIL)
scofieldi, Cyrtoceras scofieldi Foerste, 1932 † - syn of: Laphamoceras scofieldi (Foerste, 1932) † (FOSSIL)
scoticum, Cyrtoceras scoticum Blake † (FOSSIL)
shumardi, Cyrtoceras shumardi Clarke, 1897 † (FOSSIL)
sibiricum, Oratoceras sibiricum Zhuravleva † (FOSSIL)
simplex, Cyrtoceras simplex Billings, 1857 † - syn of: Richardsonoceras fallax (Billings, 1857) † (FOSSIL)
sinuoseptatum, Cyrtoceras sinuoseptatum Roemer, 1861 † - syn of: Richardsonoceras sinuososeptatum (Roemer, 1861) † (FOSSIL)
siphoexcentrica, Balashovia siphoexcentrica (Balashov, 1955) † (FOSSIL)
sociale, Cyrtoceras sociale Hall, 1876 † - syn of: Isorthoceras sociale (Hall, 1877) † (FOSSIL)
strangulatum, Cyrtoceras strangulatum Barrande † (FOSSIL)
subcompressum, Cyrtoceras subcompressum Beecher, 1886 † - syn of: Glyptodendron subcompressum (Beecher, 1886) † (FOSSIL)
subornatum, Cyrtoceras subornatum McCoy † (FOSSIL)
subturbinatum, Cyrtoceras subturbinatum Billings, 1857 † - syn of: Minganoceras subturbinatum (Billings, 1857) † (FOSSIL)
tardum, Cyrtoceras tardum Barrande † (FOSSIL)
tenue, Gyroceras tenue Barrande, 1865 † - syn of: Erbenoceras advolvens (Erben, 1960) † (FOSSIL)
thompsoni, Cyrtoceras thompsoni Miller, 1894 † - syn of: Fayettoceras thompsoni (Miller, 1894) † (FOSSIL)
turbiniforme, Apioceras turbiniforme Meek & Worthen † - syn of: Gomphoceras turbiniforme Meek & Worthen † (FOSSIL)
vassarina, Cyrtoceras vassarina Dwight, 1884 † - syn of: Bassleroceras vassarina (Dwight, 1884) † (FOSSIL)
velidagensis, Balashovia velidagensis Zhuravleva, 1979 † (FOSSIL)
ventricosum, Cyrtoceras ventricosum Miller, 1875 † - syn of: Westonoceras ventricosum (Miller, 1875) † (FOSSIL)
virgula, Cyrtoceras virgula Barrande, 1866 † - syn of: Protophragmoceras virgula (Barrande, 1866) † (FOSSIL)
zolkinae, Mimolychnoceras zolkinae Zhuravleva, 1974 † - syn of: Almaloceras abaeratum Zhuravleva, 1974 † (FOSSIL)
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