Borealites
compressus
Igolnikov, 2014 †
(FOSSIL)

Borealites
compressus
Igolnikov, 2014 †
(FOSSIL)

Craspedites
nodiger
(K.E.I. von Eichwald, 1865 †)
(FOSSIL)

Craspedites
complanatus
A. von Koenen 1902 †
(FOSSIL)

Craspedites
subditus
(Trautschold, 1877 †)
(FOSSIL)

Craspedites
sachsi
Igolnikov, 2012 †
(FOSSIL)

Craspedites
thurrelli
Casey †
(FOSSIL)

Dichotomites
krausei
Kemper, 1978 †
(FOSSIL)

Dichotomites
amundensis
Kemper & Jeletzky, 1979 †
(FOSSIL)

Dichotomites
crassus
(Kemper, 1978 †)
(FOSSIL)

Dichotomites
ellefensis
Kemper & Jeletzky, 1979 †
(FOSSIL)

Dichotomites
flexicosta
(A. von Koenen, 1902 †)
(FOSSIL)

Dichotomites
hollwedensis
(Kemper, 1978 †)
(FOSSIL)

Dichotomites
mackneyi
Alsen, 2006 †
(FOSSIL)

Dichotomites
polytomus
(A. von Koenen, 1902 †)
(FOSSIL)

Dichotomites
multicostatus
Imlay, 1940 †
(FOSSIL)

Dichotomites
typicus
Spath, 1924 †
(FOSSIL)

Dichotomites
krausei
Kemper, 1978 †
(FOSSIL)

Dichotomites
amundensis
Kemper & Jeletzky, 1979 †
(FOSSIL)

Dichotomites
crassus
(Kemper, 1978 †)
(FOSSIL)

Dichotomites
ellefensis
Kemper & Jeletzky, 1979 †
(FOSSIL)

Dichotomites
flexicosta
(A. von Koenen, 1902 †)
(FOSSIL)

Dichotomites
hollwedensis
(Kemper, 1978 †)
(FOSSIL)

Dichotomites
mackneyi
Alsen, 2006 †
(FOSSIL)

Dichotomites
polytomus
(A. von Koenen, 1902 †)
(FOSSIL)

Dichotomites
multicostatus
Imlay, 1940 †
(FOSSIL)

Dichotomites
typicus
Spath, 1924 †
(FOSSIL)

Hectoroceras
larwoodi
R. Casey 1973 †
(FOSSIL)

Hertleinites
pecki
Imlay, 1960 †
(FOSSIL)

Hollisites
inflatus
Imlay, 1960 †
(FOSSIL)

Hollisites
lucasi
Inlay, 1957 †
(FOSSIL)

Khetoceras
craspeditiformis
Rogov, 2014 †
(FOSSIL)

Menjaites
groenlandicus
Alsen, 2006 †
(FOSSIL)

Menjaites
imperceptus
Sazonova, 1971 †
(FOSSIL)

Menjaites
surlyki
Alsen, 2006 †
(FOSSIL)

Menjaites
groenlandicus
Alsen, 2006 †
(FOSSIL)

Menjaites
imperceptus
Sazonova, 1971 †
(FOSSIL)

Menjaites
surlyki
Alsen, 2006 †
(FOSSIL)

Nikitinoceras
inflatum
Bodylevsky, 1967 †
(FOSSIL)

Nikitinoceras
intermedium
Klimova, 1984 †
(FOSSIL)

Nikitinoceras
mokschensis
(Bogoslowsky, 1902 †)
(FOSSIL)

Nikitinoceras
variisculptum
Pavlow, 1914 †
(FOSSIL)

Nikitinoceras
borealis
(Bodylevsky, 1902 †)
(FOSSIL)

Nikitinoceras
diptychum
(Keyserling, 1846 †)
(FOSSIL)

Nikitinoceras
euriptychoides
Klimova, 1984 †
(FOSSIL)

Nikitinoceras
syzranicum
(Pavlow & Lamplugh, 1892 †)
(FOSSIL)

Nikitinoceras
triptychiformis
(Nikitin, 1888 †)
(FOSSIL)

Nikitinoceras
inflatum
Bodylevsky, 1967 †
(FOSSIL)

Nikitinoceras
intermedium
Klimova, 1984 †
(FOSSIL)

Nikitinoceras
mokschensis
(Bogoslowsky, 1902 †)
(FOSSIL)

Nikitinoceras
variisculptum
Pavlow, 1914 †
(FOSSIL)

Nikitinoceras
borealis
(Bodylevsky, 1902 †)
(FOSSIL)

Nikitinoceras
diptychum
(Keyserling, 1846 †)
(FOSSIL)

Nikitinoceras
euriptychoides
Klimova, 1984 †
(FOSSIL)

Nikitinoceras
syzranicum
(Pavlow & Lamplugh, 1892 †)
(FOSSIL)

Nikitinoceras
triptychiformis
(Nikitin, 1888 †)
(FOSSIL)

Peregrinoceras
pressulus
(Bogoslowsky, 1897 †)
(FOSSIL)

Peregrinoceras
rosei
R. Casey 1973 †
(FOSSIL)

Polyptychites
thorsteinssoni
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
fasciatus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
sphaericus
(A. von Koenen, 1902 †)
(FOSSIL)

Polyptychites
sverdrupi
(Kemper & Jeletzky, 1979 †)
(FOSSIL)

Polyptychites
obsoletus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
astieriformis
(Voronets, 1962 †)
(FOSSIL)

Polyptychites
astierptychus
(Bodylevsky, 1960 †)
(FOSSIL)

Polyptychites
copiocostatus
Alsen, 2006 †
(FOSSIL)

Polyptychites
diplotomus
(A. von Koenen, 1902 †)
(FOSSIL)

Polyptychites
gravesiformis
(Pavlow, 1892 †)
(FOSSIL)

Polyptychites
laevis
(E. Donovan, 1953 †)
(FOSSIL)

Polyptychites
latissimus
(M. von Neumayr & Uhlig, 1881 †)
(FOSSIL)

Polyptychites
molsbergensis
Alsen, 2006 †
(FOSSIL)

Polyptychites
pateraeformis
(Voronets, 1962 †)
(FOSSIL)

Polyptychites
roemeri
Alsen, 2006 †
(FOSSIL)

Polyptychites
rubricosus
Alsen, 2006 †
(FOSSIL)

Polyptychites
subcoronatus
Alsen, 2006 †
(FOSSIL)

Polyptychites
traillensis
(E. Donovan, 1953 †)
(FOSSIL)

Polyptychites
ascendens
A. von Koenen, 1902 †
(FOSSIL)

Polyptychites
conferticosta
Pavlow, 1914 †
(FOSSIL)

Polyptychites
keyserlingi
(M. von Neumayr & Uhlig, 1881 †)
(FOSSIL)

Polyptychites
michalskii
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
plenus
Burdykina, 1983 †
(FOSSIL)

Polyptychites
polyptychus
(Keyserling, 1846 †)
(FOSSIL)

Polyptychites
ramulicosta
Pavlow, 1892 †
(FOSSIL)

Polyptychites
rawsoni
Alsen, 2006 †
(FOSSIL)

Polyptychites
robertsi
Alsen, 2006 †
(FOSSIL)

Polyptychites
tuberculatus
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
rectangulatus
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
stubendorffi
A. Schmidt, 1872 †
(FOSSIL)

Polyptychites
euomphalus
A. von Koenen, 1902 †
(FOSSIL)

Polyptychites
fascicostatus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
balkwilli
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
canadensis
Kemper & Jeletzky, 1979 †
(FOSSIL)

Polyptychites
hapkei
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
tschekanovskii
Pavlov, 1914 †
(FOSSIL)

Polyptychites
villersensis
Baumberger, 1908 †
(FOSSIL)

Polyptychites
gradatus
A. von Koenen 1902 †
(FOSSIL)

Polyptychites
thorsteinssoni
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
fasciatus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
sphaericus
(A. von Koenen, 1902 †)
(FOSSIL)

Polyptychites
sverdrupi
(Kemper & Jeletzky, 1979 †)
(FOSSIL)

Polyptychites
obsoletus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
astieriformis
(Voronets, 1962 †)
(FOSSIL)

Polyptychites
astierptychus
(Bodylevsky, 1960 †)
(FOSSIL)

Polyptychites
copiocostatus
Alsen, 2006 †
(FOSSIL)

Polyptychites
diplotomus
(A. von Koenen, 1902 †)
(FOSSIL)

Polyptychites
gravesiformis
(Pavlow, 1892 †)
(FOSSIL)

Polyptychites
laevis
(E. Donovan, 1953 †)
(FOSSIL)

Polyptychites
latissimus
(M. von Neumayr & Uhlig, 1881 †)
(FOSSIL)

Polyptychites
molsbergensis
Alsen, 2006 †
(FOSSIL)

Polyptychites
pateraeformis
(Voronets, 1962 †)
(FOSSIL)

Polyptychites
roemeri
Alsen, 2006 †
(FOSSIL)

Polyptychites
rubricosus
Alsen, 2006 †
(FOSSIL)

Polyptychites
subcoronatus
Alsen, 2006 †
(FOSSIL)

Polyptychites
traillensis
(E. Donovan, 1953 †)
(FOSSIL)

Polyptychites
ascendens
A. von Koenen, 1902 †
(FOSSIL)

Polyptychites
conferticosta
Pavlow, 1914 †
(FOSSIL)

Polyptychites
keyserlingi
(M. von Neumayr & Uhlig, 1881 †)
(FOSSIL)

Polyptychites
michalskii
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
plenus
Burdykina, 1983 †
(FOSSIL)

Polyptychites
polyptychus
(Keyserling, 1846 †)
(FOSSIL)

Polyptychites
ramulicosta
Pavlow, 1892 †
(FOSSIL)

Polyptychites
rawsoni
Alsen, 2006 †
(FOSSIL)

Polyptychites
robertsi
Alsen, 2006 †
(FOSSIL)

Polyptychites
tuberculatus
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
rectangulatus
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
stubendorffi
A. Schmidt, 1872 †
(FOSSIL)

Polyptychites
euomphalus
A. von Koenen, 1902 †
(FOSSIL)

Polyptychites
fascicostatus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
balkwilli
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
canadensis
Kemper & Jeletzky, 1979 †
(FOSSIL)

Polyptychites
hapkei
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
tschekanovskii
Pavlov, 1914 †
(FOSSIL)

Polyptychites
villersensis
Baumberger, 1908 †
(FOSSIL)

Polyptychites
gradatus
A. von Koenen 1902 †
(FOSSIL)

Polyptychites
thorsteinssoni
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
fasciatus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
sphaericus
(A. von Koenen, 1902 †)
(FOSSIL)

Polyptychites
sverdrupi
(Kemper & Jeletzky, 1979 †)
(FOSSIL)

Polyptychites
obsoletus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
astieriformis
(Voronets, 1962 †)
(FOSSIL)

Polyptychites
astierptychus
(Bodylevsky, 1960 †)
(FOSSIL)

Polyptychites
copiocostatus
Alsen, 2006 †
(FOSSIL)

Polyptychites
diplotomus
(A. von Koenen, 1902 †)
(FOSSIL)

Polyptychites
gravesiformis
(Pavlow, 1892 †)
(FOSSIL)

Polyptychites
laevis
(E. Donovan, 1953 †)
(FOSSIL)

Polyptychites
latissimus
(M. von Neumayr & Uhlig, 1881 †)
(FOSSIL)

Polyptychites
molsbergensis
Alsen, 2006 †
(FOSSIL)

Polyptychites
pateraeformis
(Voronets, 1962 †)
(FOSSIL)

Polyptychites
roemeri
Alsen, 2006 †
(FOSSIL)

Polyptychites
rubricosus
Alsen, 2006 †
(FOSSIL)

Polyptychites
subcoronatus
Alsen, 2006 †
(FOSSIL)

Polyptychites
traillensis
(E. Donovan, 1953 †)
(FOSSIL)

Polyptychites
ascendens
A. von Koenen, 1902 †
(FOSSIL)

Polyptychites
conferticosta
Pavlow, 1914 †
(FOSSIL)

Polyptychites
keyserlingi
(M. von Neumayr & Uhlig, 1881 †)
(FOSSIL)

Polyptychites
michalskii
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
plenus
Burdykina, 1983 †
(FOSSIL)

Polyptychites
polyptychus
(Keyserling, 1846 †)
(FOSSIL)

Polyptychites
ramulicosta
Pavlow, 1892 †
(FOSSIL)

Polyptychites
rawsoni
Alsen, 2006 †
(FOSSIL)

Polyptychites
robertsi
Alsen, 2006 †
(FOSSIL)

Polyptychites
tuberculatus
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
rectangulatus
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
stubendorffi
A. Schmidt, 1872 †
(FOSSIL)

Polyptychites
euomphalus
A. von Koenen, 1902 †
(FOSSIL)

Polyptychites
fascicostatus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
balkwilli
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
canadensis
Kemper & Jeletzky, 1979 †
(FOSSIL)

Polyptychites
hapkei
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
tschekanovskii
Pavlov, 1914 †
(FOSSIL)

Polyptychites
villersensis
Baumberger, 1908 †
(FOSSIL)

Polyptychites
gradatus
A. von Koenen 1902 †
(FOSSIL)

Polyptychites
thorsteinssoni
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
fasciatus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
sphaericus
(A. von Koenen, 1902 †)
(FOSSIL)

Polyptychites
sverdrupi
(Kemper & Jeletzky, 1979 †)
(FOSSIL)

Polyptychites
obsoletus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
astieriformis
(Voronets, 1962 †)
(FOSSIL)

Polyptychites
astierptychus
(Bodylevsky, 1960 †)
(FOSSIL)

Polyptychites
copiocostatus
Alsen, 2006 †
(FOSSIL)

Polyptychites
diplotomus
(A. von Koenen, 1902 †)
(FOSSIL)

Polyptychites
gravesiformis
(Pavlow, 1892 †)
(FOSSIL)

Polyptychites
laevis
(E. Donovan, 1953 †)
(FOSSIL)

Polyptychites
latissimus
(M. von Neumayr & Uhlig, 1881 †)
(FOSSIL)

Polyptychites
molsbergensis
Alsen, 2006 †
(FOSSIL)

Polyptychites
pateraeformis
(Voronets, 1962 †)
(FOSSIL)

Polyptychites
roemeri
Alsen, 2006 †
(FOSSIL)

Polyptychites
rubricosus
Alsen, 2006 †
(FOSSIL)

Polyptychites
subcoronatus
Alsen, 2006 †
(FOSSIL)

Polyptychites
traillensis
(E. Donovan, 1953 †)
(FOSSIL)

Polyptychites
ascendens
A. von Koenen, 1902 †
(FOSSIL)

Polyptychites
conferticosta
Pavlow, 1914 †
(FOSSIL)

Polyptychites
keyserlingi
(M. von Neumayr & Uhlig, 1881 †)
(FOSSIL)

Polyptychites
michalskii
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
plenus
Burdykina, 1983 †
(FOSSIL)

Polyptychites
polyptychus
(Keyserling, 1846 †)
(FOSSIL)

Polyptychites
ramulicosta
Pavlow, 1892 †
(FOSSIL)

Polyptychites
rawsoni
Alsen, 2006 †
(FOSSIL)

Polyptychites
robertsi
Alsen, 2006 †
(FOSSIL)

Polyptychites
tuberculatus
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
rectangulatus
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
stubendorffi
A. Schmidt, 1872 †
(FOSSIL)

Polyptychites
euomphalus
A. von Koenen, 1902 †
(FOSSIL)

Polyptychites
fascicostatus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
balkwilli
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
canadensis
Kemper & Jeletzky, 1979 †
(FOSSIL)

Polyptychites
hapkei
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
tschekanovskii
Pavlov, 1914 †
(FOSSIL)

Polyptychites
villersensis
Baumberger, 1908 †
(FOSSIL)

Polyptychites
gradatus
A. von Koenen 1902 †
(FOSSIL)

Polyptychites
thorsteinssoni
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
fasciatus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
sphaericus
(A. von Koenen, 1902 †)
(FOSSIL)

Polyptychites
sverdrupi
(Kemper & Jeletzky, 1979 †)
(FOSSIL)

Polyptychites
obsoletus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
astieriformis
(Voronets, 1962 †)
(FOSSIL)

Polyptychites
astierptychus
(Bodylevsky, 1960 †)
(FOSSIL)

Polyptychites
copiocostatus
Alsen, 2006 †
(FOSSIL)

Polyptychites
diplotomus
(A. von Koenen, 1902 †)
(FOSSIL)

Polyptychites
gravesiformis
(Pavlow, 1892 †)
(FOSSIL)

Polyptychites
laevis
(E. Donovan, 1953 †)
(FOSSIL)

Polyptychites
latissimus
(M. von Neumayr & Uhlig, 1881 †)
(FOSSIL)

Polyptychites
molsbergensis
Alsen, 2006 †
(FOSSIL)

Polyptychites
pateraeformis
(Voronets, 1962 †)
(FOSSIL)

Polyptychites
roemeri
Alsen, 2006 †
(FOSSIL)

Polyptychites
rubricosus
Alsen, 2006 †
(FOSSIL)

Polyptychites
subcoronatus
Alsen, 2006 †
(FOSSIL)

Polyptychites
traillensis
(E. Donovan, 1953 †)
(FOSSIL)

Polyptychites
ascendens
A. von Koenen, 1902 †
(FOSSIL)

Polyptychites
conferticosta
Pavlow, 1914 †
(FOSSIL)

Polyptychites
keyserlingi
(M. von Neumayr & Uhlig, 1881 †)
(FOSSIL)

Polyptychites
michalskii
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
plenus
Burdykina, 1983 †
(FOSSIL)

Polyptychites
polyptychus
(Keyserling, 1846 †)
(FOSSIL)

Polyptychites
ramulicosta
Pavlow, 1892 †
(FOSSIL)

Polyptychites
rawsoni
Alsen, 2006 †
(FOSSIL)

Polyptychites
robertsi
Alsen, 2006 †
(FOSSIL)

Polyptychites
tuberculatus
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
rectangulatus
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
stubendorffi
A. Schmidt, 1872 †
(FOSSIL)

Polyptychites
euomphalus
A. von Koenen, 1902 †
(FOSSIL)

Polyptychites
fascicostatus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
balkwilli
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
canadensis
Kemper & Jeletzky, 1979 †
(FOSSIL)

Polyptychites
hapkei
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
tschekanovskii
Pavlov, 1914 †
(FOSSIL)

Polyptychites
villersensis
Baumberger, 1908 †
(FOSSIL)

Polyptychites
gradatus
A. von Koenen 1902 †
(FOSSIL)

Polyptychites
thorsteinssoni
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
fasciatus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
sphaericus
(A. von Koenen, 1902 †)
(FOSSIL)

Polyptychites
sverdrupi
(Kemper & Jeletzky, 1979 †)
(FOSSIL)

Polyptychites
obsoletus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
astieriformis
(Voronets, 1962 †)
(FOSSIL)

Polyptychites
astierptychus
(Bodylevsky, 1960 †)
(FOSSIL)

Polyptychites
copiocostatus
Alsen, 2006 †
(FOSSIL)

Polyptychites
diplotomus
(A. von Koenen, 1902 †)
(FOSSIL)

Polyptychites
gravesiformis
(Pavlow, 1892 †)
(FOSSIL)

Polyptychites
laevis
(E. Donovan, 1953 †)
(FOSSIL)

Polyptychites
latissimus
(M. von Neumayr & Uhlig, 1881 †)
(FOSSIL)

Polyptychites
molsbergensis
Alsen, 2006 †
(FOSSIL)

Polyptychites
pateraeformis
(Voronets, 1962 †)
(FOSSIL)

Polyptychites
roemeri
Alsen, 2006 †
(FOSSIL)

Polyptychites
rubricosus
Alsen, 2006 †
(FOSSIL)

Polyptychites
subcoronatus
Alsen, 2006 †
(FOSSIL)

Polyptychites
traillensis
(E. Donovan, 1953 †)
(FOSSIL)

Polyptychites
ascendens
A. von Koenen, 1902 †
(FOSSIL)

Polyptychites
conferticosta
Pavlow, 1914 †
(FOSSIL)

Polyptychites
keyserlingi
(M. von Neumayr & Uhlig, 1881 †)
(FOSSIL)

Polyptychites
michalskii
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
plenus
Burdykina, 1983 †
(FOSSIL)

Polyptychites
polyptychus
(Keyserling, 1846 †)
(FOSSIL)

Polyptychites
ramulicosta
Pavlow, 1892 †
(FOSSIL)

Polyptychites
rawsoni
Alsen, 2006 †
(FOSSIL)

Polyptychites
robertsi
Alsen, 2006 †
(FOSSIL)

Polyptychites
tuberculatus
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
rectangulatus
Bogoslowsky, 1902 †
(FOSSIL)

Polyptychites
stubendorffi
A. Schmidt, 1872 †
(FOSSIL)

Polyptychites
euomphalus
A. von Koenen, 1902 †
(FOSSIL)

Polyptychites
fascicostatus
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
balkwilli
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
canadensis
Kemper & Jeletzky, 1979 †
(FOSSIL)

Polyptychites
hapkei
Jeletzky & Kemper, 1988 †
(FOSSIL)

Polyptychites
tschekanovskii
Pavlov, 1914 †
(FOSSIL)

Polyptychites
villersensis
Baumberger, 1908 †
(FOSSIL)

Polyptychites
gradatus
A. von Koenen 1902 †
(FOSSIL)

Ringnesiceras
pseudopolyptychites
Kemper & Jeletzky, 1979 †
(FOSSIL)

Ringnesiceras
pseudopolyptychum
Kemper & Jeletzky, 1979 †
(FOSSIL)

Ringnesiceras
tozeri
Kemper & Jeletzky, 1979 †
(FOSSIL)

Ringnesiceras
pseudopolyptychites
Kemper & Jeletzky, 1979 †
(FOSSIL)

Ringnesiceras
pseudopolyptychum
Kemper & Jeletzky, 1979 †
(FOSSIL)

Ringnesiceras
tozeri
Kemper & Jeletzky, 1979 †
(FOSSIL)

Siberiptychites
pavlovi
Voronets, 1962 †
(FOSSIL)

Simbirskites
decheni
(A. Römer, 1841 †)
(FOSSIL)

Simbirskites
lecontei
Anderson, 1938 †
(FOSSIL)

Simbirskites
morvenae
Whitehouse, 1927 †
(FOSSIL)

Simbirskites
coronatirormis
(Pavlov †)
(FOSSIL)

Surites
stenomphalus
(Pavlow, 1890 †)
(FOSSIL)

Surites
tealli
T.L. Casey, 1973 †
(FOSSIL)

Surites
analogus
(Bogoslowsky, 1897 †)
(FOSSIL)

Surites
pechorensis
Sazonov, 1951 †
(FOSSIL)

Surites
simplex
(Bogoslowsky, 1902 †)
(FOSSIL)

Surites
stenomphalus
(Pavlow, 1890 †)
(FOSSIL)

Surites
tealli
T.L. Casey, 1973 †
(FOSSIL)

Surites
analogus
(Bogoslowsky, 1897 †)
(FOSSIL)

Surites
pechorensis
Sazonov, 1951 †
(FOSSIL)

Surites
simplex
(Bogoslowsky, 1902 †)
(FOSSIL)

Tollia
greenlandica
(E. Donovan, 1953 †)
(FOSSIL)

Tollia
pentagonalis
Alsen, 2006 †
(FOSSIL)

Tollia
piaseckii
Alsen, 2006 †
(FOSSIL)

Tollia
rutila
Alsen, 2006 †
(FOSSIL)

Tollia
semilaevis
(A. von Koenen, 1902 †)
(FOSSIL)

Tollia
semisulcata
(A. von Koenen, 1902 †)
(FOSSIL)

Tollia
undulatocostata
(E. Donovan, 1953 †)
(FOSSIL)

Tollia
tolli
Pavlow, 1914 †
(FOSSIL)

Tollia
speetonensis
(Spath, 1924 †)
(FOSSIL)

Tollia
greenlandica
(E. Donovan, 1953 †)
(FOSSIL)

Tollia
pentagonalis
Alsen, 2006 †
(FOSSIL)

Tollia
piaseckii
Alsen, 2006 †
(FOSSIL)

Tollia
rutila
Alsen, 2006 †
(FOSSIL)

Tollia
semilaevis
(A. von Koenen, 1902 †)
(FOSSIL)

Tollia
semisulcata
(A. von Koenen, 1902 †)
(FOSSIL)

Tollia
undulatocostata
(E. Donovan, 1953 †)
(FOSSIL)

Tollia
tolli
Pavlow, 1914 †
(FOSSIL)

Tollia
speetonensis
(Spath, 1924 †)
(FOSSIL)

Virgatoptychites
quadrificus
(A. von Koenen, 1902 †)
(FOSSIL)

Virgatoptychites
tenuicostatus
Kemper, 1968 †
(FOSSIL)

Virgatoptychites
changalassensis
Voronets, 1958 †
(FOSSIL)

Virgatoptychites
quadrifidus
(A. von Koenen 1902 †)
(FOSSIL)

Virgatoptychites
quadrificus
(A. von Koenen, 1902 †)
(FOSSIL)

Virgatoptychites
tenuicostatus
Kemper, 1968 †
(FOSSIL)

Virgatoptychites
changalassensis
Voronets, 1958 †
(FOSSIL)

Virgatoptychites
quadrifidus
(A. von Koenen 1902 †)
(FOSSIL)