Apioceras
turbiniforme
F.B. Meek & A.H. Worthen †
(FOSSIL)

Balashovia
borea
P.A. Zhuravleva, 1974 †
(FOSSIL)

Balashovia
pristis
P.A. Zhuravleva, 1974 †
(FOSSIL)

Balashovia
velidagensis
P.A. Zhuravleva, 1979 †
(FOSSIL)

Balashovia
siphoexcentrica
(I. Balashov, 1955 †)
(FOSSIL)

Cyrtoceras
hoernesi
Barrande, 1865 †
(FOSSIL)

Cyrtoceras
maximus
T.A. Conrad, 1838 †
(FOSSIL)

Cyrtoceras
lagowiense
Gürich, 1896 †
(FOSSIL)

Cyrtoceras
minneapolis
A.H. Clarke, 1897 †
(FOSSIL)

Cyrtoceras
kochyonense
T. Kobayashi, 1928 †
(FOSSIL)

Cyrtoceras
murchisoni
Barrande, 1867 †
(FOSSIL)

Cyrtoceras
manitobense
J.J.F. Whiteaves, 1890 †
(FOSSIL)

Cyrtoceras
ventricosum
S.A. Miller, 1875 †
(FOSSIL)

Cyrtoceras
occidentale
J.J.F. Whiteaves, 1890 †
(FOSSIL)

Cyrtoceras
beaumonti
Barrande, 1866 †
(FOSSIL)

Cyrtoceras
conspicuum
Barrande, 1866 †
(FOSSIL)

Cyrtoceras
virgula
Barrande, 1866 †
(FOSSIL)

Cyrtoceras
fracturn
Barrande, 1866 †
(FOSSIL)

Cyrtoceras
aduncum
Barrande, 1866 †
(FOSSIL)

Cyrtoceras
nobile
Barrande, 1866 †
(FOSSIL)

Cyrtoceras
moestum
Barrande, 1866 †
(FOSSIL)

Cyrtoceras
kirbyi
R.P. Whitfield, 1889 †
(FOSSIL)

Cyrtoceras
vassarina
Dwight, 1884 †
(FOSSIL)

Cyrtoceras
platygaster
I. von Born, 1912 †
(FOSSIL)

Cyrtoceras
heteroclytum
Barrande, 1866 †
(FOSSIL)

Cyrtoceras
priscum
K.E.I. von Eichwald, 1861 †
(FOSSIL)

Cyrtoceras
amoenum
Miller, 1879 †
(FOSSIL)

Cyrtoceras
billingsi
A.H. Clarke, 1897 †
(FOSSIL)

Cyrtoceras
sinuoseptatum
F.A. Roemer, 1861 †
(FOSSIL)

Cyrtoceras
lysander
Billings, 1865 †
(FOSSIL)

Cyrtoceras
nepotulus
Barrande, 1877 †
(FOSSIL)

Cyrtoceras
plebeium
Barrande, 1866 †
(FOSSIL)

Cyrtoceras
boycii
R.P. Whitfield, 1886 †
(FOSSIL)

Cyrtoceras
sociale
J.W. Hall, 1876 †
(FOSSIL)

Cyrtoceras
featherstonhaughi
A.H. Clarke, 1897 †
(FOSSIL)

Cyrtoceras
subturbinatum
Billings, 1857 †
(FOSSIL)

Cyrtoceras
houghtoni
A.H. Clarke †
(FOSSIL)

Cyrtoceras
neleus
J.W. Hall †
(FOSSIL)

Cyrtoceras
thompsoni
Miller, 1894 †
(FOSSIL)

Cyrtoceras
shumardi
A.H. Clarke, 1897 †
(FOSSIL)

Cyrtoceras
camurum
(J.W. Hall, 1847 †)
(FOSSIL)

Cyrtoceras
norwoodi
A.H. Clarke, 1897 †
(FOSSIL)

Cyrtoceras
billingsi
(Salter, 1859 †)
(FOSSIL)

Cyrtoceras
hallianum
A.V.M.D. D'Orbigny †
(FOSSIL)

Cyrtoceras
patulum
Barrande, 1866 †
(FOSSIL)

Cyrtoceras
alinae
Barrande, 1866 †
(FOSSIL)

Cyrtoceras
simplex
Billings, 1857 †
(FOSSIL)

Cyrtoceras
cornulum
Schuchert, 1900 †
(FOSSIL)

Cyrtoceras
subcompressum
C.E. Beecher, 1886 †
(FOSSIL)

Cyrtoceras
macrostomum
J.W. Hall, 1847 †
(FOSSIL)

Cyrtoceras
magister
Miller, 1875 †
(FOSSIL)

Cyrtoceras
baffinensis
Schuchert, 1900 †
(FOSSIL)

Cyrtoceras
alternans
(Tietze, 1870 †)
(FOSSIL)

Cyrtoceras
bryozoon
(Barrande, 1866 †)
(FOSSIL)

Cyrtoceras
castor
(Barrande, 1866 †)
(FOSSIL)

Cyrtoceras
circumflexum
Barrande †
(FOSSIL)

Cyrtoceras
concors
Barrande †
(FOSSIL)

Cyrtoceras
cyclostomum
(Barrande, 1866 †)
(FOSSIL)

Cyrtoceras
ellipticum
Sobolew, 1912 †
(FOSSIL)

Cyrtoceras
elongatum
Gurich, 1901 †
(FOSSIL)

Cyrtoceras
esuriens
(Barrande, 1866 †)
(FOSSIL)

Cyrtoceras
forte
(Barrande, 1866 †)
(FOSSIL)

Cyrtoceras
inflectens
Barrande †
(FOSSIL)

Cyrtoceras
mirum
(Barrande, 1866 †)
(FOSSIL)

Cyrtoceras
obesum
(Barrande, 1866 †)
(FOSSIL)

Cyrtoceras
pollux
(Barrande, 1866 †)
(FOSSIL)

Cyrtoceras
pugio
(Barrande, 1868 †)
(FOSSIL)

Cyrtoceras
strangulatum
Barrande †
(FOSSIL)

Cyrtoceras
tardum
Barrande †
(FOSSIL)

Cyrtoceras
equisetum
(Blake, 1882 †)
(FOSSIL)

Cyrtoceras
llandoveri
Blake †
(FOSSIL)

Cyrtoceras
magnum
(Blake, 1882 †)
(FOSSIL)

Cyrtoceras
reversum
(Blake, 1882 †)
(FOSSIL)

Cyrtoceras
robertsii
Whidborne †
(FOSSIL)

Cyrtoceras
scoticum
Blake †
(FOSSIL)

Cyrtoceras
subornatum
McCoy †
(FOSSIL)

Doleroceras
insperatum
P.A. Zhuravleva, 1974 †
(FOSSIL)

Gyroceras
tenue
Barrande, 1865 †
(FOSSIL)

Gyroceras
circulare
Barrande, 1865 †
(FOSSIL)

Gyroceras
nodosocostatum
C. Gemmellaro, 1889 †
(FOSSIL)

Gyroceras
medlicottianum
L. Waagen, 1879 †
(FOSSIL)

Gyroceras
halli
Wedekind, 1908 †
(FOSSIL)

Gyroceras
annulatum
Barrande †
(FOSSIL)

Gyroceras
fritschi
Barrande, 1877 †
(FOSSIL)

Gyroceras
nudum
Barrande, 1865 †
(FOSSIL)

Pachtoceras
evlanensis
P.A. Zhuravleva, 1972 †
(FOSSIL)

Pachtoceras
abbreviatum
(Gurich, 1901 †)
(FOSSIL)

Pachtoceras
hyperboreum
P.A. Zhuravleva, 1972 †
(FOSSIL)

Pachtoceras
rotundum
Pacht †
(FOSSIL)