aarica, Paffrathia aarica Heidelberger, 2001 † (FOSSIL)
abowsheri, Cancelloplatyceras abowsheri Cook & al., 2003 † (FOSSIL)
abundans, Platyceras abundans (Wanner, 1922) † (FOSSIL)
aculeatum, Platyceras aculeatum Barrois, 1889 † - syn of: Orthonychia aculeata Barrois, 1889 † (FOSSIL)
acutirostre, Palaeocapulus acutirostre (Hall, 1856) † (FOSSIL)
adstrictum, Platyostoma adstrictum Lindström, 1884 † (FOSSIL)
afflicta, Keeneia afflicta Wass, 1967 † (FOSSIL)
aiens, Cyclonema aiens (Sardeson, 1896) † (FOSSIL)
allardycei, Platyostoma allardycei Clarke, 1913 † (FOSSIL)
alta, Rhabdocantha alta (Dana, 1849) † (FOSSIL)
ammon, Platyceras ammon Hall, 1862 † (FOSSIL)
ampullosum, Cyclonema ampullosum Perner, 1903 † (FOSSIL)
ananas, Cyclonema ananas Perner, 1903 † (FOSSIL)
andrewsi, Strophostylus andrewsi Hall, 1859 † (FOSSIL)
angulatum, Platyceras angulatum Hall, 1852 † (FOSSIL)
angustum, Platyceras angustum (Phillips, 1836) † (FOSSIL)
antiquuis, Platyostoma antiquuis Webster, 1905 † (FOSSIL)
apicatum, Cyclonema apicatum Lindström, 1884 † (FOSSIL)
applanatum, Platyschisma applanatum Sandberger & Sandberger, 1855 † (FOSSIL)
arenosa, Rhineoderma arenosa de Koninck, 1883 † (FOSSIL)
argo, Platyceras argo Hall, 1862 † (FOSSIL)
arkonense, Spinyplatyceras arkonense (Shimer & Grabau, 1902) † (FOSSIL)
attenuatum, Platyceras attenuatum Hall, 1859 † (FOSSIL)
auriculatum, Platyceras auriculatum Hall, 1876 † (FOSSIL)
australis, Cyclonema australis Etheridge jr., 1890 † - syn of: Australonema australis (Etheridge jr., 1890) † (FOSSIL)
baldus, Basiplanus baldus Heidelberger, 2001 † (FOSSIL)
barrisi, Platyschisma barrisi Winchell, 1863 † (FOSSIL)
bartlettense, Spinyplatyceras bartlettense (Yochelson & Kopf, 1956) † (FOSSIL)
belandi, Crossoceras belandi Boucot & Yochelson, 1966 † (FOSSIL)
bellulum, Cyclonema bellulum Billings, 1866 † (FOSSIL)
belua, Cancellator belua Horný, 1992 † (FOSSIL)
benediana, Rhineoderma benediana (de Koninck, 1844) † (FOSSIL)
bilex, Cyclonema bilex Conrad, 1842 † - syn of: Cyclonema bilix (Conrad, 1842) † (FOSSIL)
bilix, Cyclonema bilix (Conrad, 1842) † (FOSSIL)
bilix conicum, Cyclonema bilix conicum Miller, 1874 † (FOSSIL)
bilix fluctuatum, Cyclonema bilix fluctuatum (Conrad, 1842) † (FOSSIL)
billingsi, Platyceras billingsi Hall, 1859 † (FOSSIL)
bistrami, Platyceras bistrami Knod, 1908 † (FOSSIL)
bivolve, Strophostylus bivolve White & Whitfield, 1862 † (FOSSIL)
blatchleyi, Euthyrhachis blatchleyi (Kindle, 1900) † (FOSSIL)
blodgetti, Lotzia blodgetti Heidelberger & Koch, 2005 † (FOSSIL)
boggsi, Platyostoma boggsi Rohr & al., 1981 † (FOSSIL)
bohemicum, Ploconema bohemicum Perner, 1903 † (FOSSIL)
boreale, Cyclonema boreale Poulsen, 1974 † (FOSSIL)
brownsportense, Platyostoma brownsportense Foerste, 1903 † (FOSSIL)
bucculentum, Platyceras bucculentum Hall, 1862 † (FOSSIL)
caelatus, Brokenriveria caelatus (Goldfuss, 1844) † (FOSSIL)
caleata, Brokenriveria caleata (Goldfuss, 1844) † (FOSSIL)
callosa, Platyostoma lineata callosa Hall (FOSSIL)
callossum, Platyceras callossum Hall, 1859 † (FOSSIL)
campanulatum, Platyceras campanulatum Barrois, 1889 † - syn of: Orthonychia campanulata Barrois, 1889 † (FOSSIL)
canalicatum, Platyceras canalicatum Angelin & Lindström, 1880 † (FOSSIL)
canaliculata, Cyclonema canaliculata Angelin & Lindström, 1880 † (FOSSIL)
cancellata, Strophostylus cancellata (Hall, 1847) † (FOSSIL)
cancellata, Strophostylus cancellata Angelin & Lindström, 1880 † (FOSSIL)
cancellatum, Cyclonema cancellatum Angelin & Lindström, 1880 † (FOSSIL)
carens, Dyeria carens Perner, 1903 † - syn of: Beraunia carens (Perner, 1903) † (FOSSIL)
carinatum, Platyceras carinatum Hall, 1862 † (FOSSIL)
carinatum glabrum, Platyceras carinatum glabrum Lindström, 1884 † (FOSSIL)
carnarvonensis, Keeneia carnarvonensis Dickins, 1957 † (FOSSIL)
carnicus, Nonorios carnicus (Vinassa de Regny, 1914) † (FOSSIL)
chapmani, Platyceras chapmani Williams & Breger, 1916 † (FOSSIL)
cheloti, Praenatica cheloti (Oehlert, 1887) † (FOSSIL)
chesterensis, Strophostylus chesterensis Thein & Nitecki, 1974 † (FOSSIL)
circumnodosum, Cyclonema circumnodosum Kittl, 1894 † - syn of: Eucycloscala circumnodosa (Kittl, 1894) † (FOSSIL)
cirroides, Platyschisma cirroides M'Coy, 1844 † (FOSSIL)
cives, Cyclonema cives Perner, 1903 † (FOSSIL)
cliftonensis, Platyostoma cliftonensis Foerste, 1909 † (FOSSIL)
clintonensis, Platyostoma clintonensis Foerste, 1909 † - syn of: Platyostoma cliftonensis Foerste, 1909 † (FOSSIL)
colonus, Platyceras colonus Holzapfel, 1895 † (FOSSIL)
columbinus, Platyceras columbinus (Whidborne, 1889) † (FOSSIL)
compar, Cyclonema compar Perner, 1903 † (FOSSIL)
composita, Cyclonema composita Perner, 1903 † (FOSSIL)
compressum, Platyceras compressum Clarke & Swartz, 1913 † (FOSSIL)
compressum, Platyceras compressum Jhaveri, 1969 † (FOSSIL)
compressum, Platyceras compressum Nettleroth † (FOSSIL)
compressus, Platyceras compressus (Goldfuss, 1832) † (FOSSIL)
compressus, Platyceras compressus Conrad, 1840 † (FOSSIL)
concinna, Cyclonema concinna Hall, 1876 † - syn of: Kitikamispira concinna (Hall, 1876) † (FOSSIL)
concinnum, Cyclonema concinnum Hall, 1876 † - syn of: Kitikamispira concinna (Hall, 1876) † (FOSSIL)
conicum, Platyceras conicum (Hall, 1862) † (FOSSIL)
conicum, Cyclonema bilix conicum Miller (FOSSIL)
conoideum, Platyceras conoideum Barrois, 1889 † - syn of: Orthonychia conoideum (Barrois, 1889) † (FOSSIL)
consepultum, Cyclonema consepultum Perner, 1903 † (FOSSIL)
contexta, Cyclonema contexta Perner, 1903 † - syn of: Strophostylus cancellata (Hall, 1847) † (FOSSIL)
contortum, Platyceras contortum Barrois, 1889 † (FOSSIL)
contortus, Platyceras contortus (Römer, 1843) † (FOSSIL)
convergens, Cyclonema convergens Perner, 1903 † (FOSSIL)
corallii, Cyclonema corallii de Sowerby & Murchison, 1839 † - syn of: Oriostoma coralli (de Sowerby & Murchison, 1839) † (FOSSIL)
cordatus, Platyceras cordatus Whidborne, 1889 † (FOSSIL)
cornucapella, Rhabdocantha cornucapella (Etheridge jr., 1898) † (FOSSIL)
cornutum, Platyostoma cornutum (Hisinger, 1837) † (FOSSIL)
cornutum loricatum, Platyostoma cornutum loricatum Lindström, 1884 † (FOSSIL)
costatus, Dyeria costatus (James, 1872) † (FOSSIL)
crassum, Platyceras crassum Hall, 1862 † (FOSSIL)
crebristria, Cyclonema crebristria (McCoy, 1851) † (FOSSIL)
crebristria rugata, Cyclonema crebristria rugata Pitcher † (FOSSIL)
crenistria, Tubomphalus crenistria Perner, 1903 † (FOSSIL)
crenulata, Cyclonema crenulata Meek, 1871 † - syn of: Alaionema crenulatum (Meek, 1871) † (FOSSIL)
crenulatum, Cyclonema crenulatum Meek, 1871 † - syn of: Alaionema crenulatum (Meek, 1871) † (FOSSIL)
curtum, Visitator curtum Dunbar, 1920 † - syn of: Visitator tennesseensis (Dunbar, 1920) † (FOSSIL)
cushingi, Cyclonema cushingi Ruedemann, 1912 † (FOSSIL)
cyathinium, Platyceras cyathinium Lindström, 1884 † - syn of: Orthonychia enorme (Lindström, 1884) † (FOSSIL)
cyathinum, Platyceras cyathinum Lindström, 1884 † - syn of: Orthonychia enorme (Lindström, 1884) † (FOSSIL)
cyclostomus, Strophostylus cyclostomus Hall, 1864 † (FOSSIL)
cylindrica, Cowwarrella cylindrica Talent & Philip, 1956 † - syn of: Visitator cylindricum Talent & Philip, 1956 † (FOSSIL)
cylindricum, Visitator cylindricum Talent & Philip, 1956 † (FOSSIL)
cymbium, Platyceras cymbium Hall, 1862 † (FOSSIL)
daschi, Platyceras daschi Rohr & Smith, 1978 † (FOSSIL)
daytonense, Platyostoma daytonense Foerste, 1923 † (FOSSIL)
daytonensis, Cyclonema daytonensis Foerste, 1899 † (FOSSIL)
decora, Cyclonema decora Billings, 1866 † (FOSSIL)
decorum, Platyceras decorum Talent & Philip, 1956 † (FOSSIL)
deforme, Platyostoma deforme (Sedgwick & Murchison, 1840) † (FOSSIL)
delicata, Platyostoma delicata (Talent & Philip, 1956) † (FOSSIL)
delicata, Ostlerina delicata Talent & Philip, 1956 † - syn of: Platyostoma delicata (Talent & Philip, 1956) † (FOSSIL)
delicatula, Cyclonema delicatula Lindström, 1884 † (FOSSIL)
depressa, Platyschisma depressa Weller, 1900 † (FOSSIL)
depressum, Platyschisma depressum Dana, 1847 † (FOSSIL)
depressum, Platyceras depressum Ulrich & Scofield, 1897 † - syn of: Helcionopsis depressum (Ulrich & Scofield, 1897) † (FOSSIL)
derelictum, Cyclonema derelictum Perner, 1903 † (FOSSIL)
desmatum, Platyostoma desmatum Clarke, 1904 † (FOSSIL)
devonica, Spiranodus devonica (Whidborne, 1889) † (FOSSIL)
dignitas, Spironemella dignitas (Waterhouse, 1963) † (FOSSIL)
dilatans, Platyceras dilatans Perner, 1911 † (FOSSIL)
dilatatum, Platyceras dilatatum Hall, 1859 † (FOSSIL)
dinglensis, Rhineoderma dinglensis Girty, 1927 † (FOSSIL)
disciforme, Platyceras disciforme Lindström, 1884 † (FOSSIL)
distans, Cyclonema distans Lindström, 1884 † - syn of: Oriostoma distans (Lindström, 1884) † (FOSSIL)
dormitans, Platyceras dormitans Maurer, 1885 † (FOSSIL)
dowlingii, Cyclonema dowlingii (Whiteaves, 1906) † (FOSSIL)
dubium, Platyceras dubium Barrois, 1889 † - syn of: Orthonychia dubium (Barrois, 1889) † (FOSSIL)
dumosiforme, Spinyplatyceras dumosiforme (Koken, 1889) † (FOSSIL)
dumosum, Spinyplatyceras dumosum (Conrad, 1840) † (FOSSIL)
dumosum pileum, Spinyplatyceras dumosum pileum (Kindle, 1900) † (FOSSIL)
dumosum rarispinum, Spinyplatyceras dumosum rarispinum (Hall, 1859) † (FOSSIL)
duriculatum, Platyceras duriculatum Hall, 1879 † (FOSSIL)
eberti, Platyceras eberti Holzapfel, 1895 † (FOSSIL)
echinatum, Platyceras echinatum Hall, 1862 † (FOSSIL)
edmundi, Platyceras edmundi Williams & Breger, 1916 † (FOSSIL)
elatus, Tubomphalus elatus (Perner, 1903) † (FOSSIL)
elegans, Strophostylus elegans Hall, 1859 † (FOSSIL)
elegans, Naticonoda elegans Heidelberger, 2001 † (FOSSIL)
elevatus, Strophostylus elevatus Hall, 1868 † (FOSSIL)
elongatum, Platyceras elongatum Hall, 1859 † (FOSSIL)
emergens, Tubomphalus emergens (Perner, 1903) † (FOSSIL)
emmemmjae, Platyceras emmemmjae Cook & Jell, 2016 † (FOSSIL)
encloides, Platyceras encloides Weller, 1906 † (FOSSIL)
enorme, Platyceras enorme Lindström, 1884 † - syn of: Orthonychia enorme (Lindström, 1884) † (FOSSIL)
equilateralis, Palaeocapulus equilateralis (Hall, 1859) † (FOSSIL)
erectum, Platyceras erectum Hall, 1843 † (FOSSIL)
erinacum, Spinyplatyceras erinacum (Koken, 1889) † (FOSSIL)
esthetica, Leptozone esthetica Perner, 1907 † (FOSSIL)
etheridgei, Paraplatyschisma etheridgei Waterhouse, 1987 † (FOSSIL)
euomphaloides, Platyceras euomphaloides (McCoy) † (FOSSIL)
euomphaloides, Platyostoma euomphaloides Hall, 1879 † (FOSSIL)
evolutus, Platyceras evolutus Weller, 1906 † (FOSSIL)
expansus, Platyceras expansus Conrad, 1842 † (FOSSIL)
extensum, Platyceras extensum Barrois, 1889 † - syn of: Orthonychia extensum (Barrois, 1889) † (FOSSIL)
extraneus, Visitator extraneus Perner, 1911 † (FOSSIL)
fasciata, Cyclonema fasciata Ball, 1938 † (FOSSIL)
fecundum, Platyceras fecundum Perner, 1911 † (FOSSIL)
ferrigenum, Platyostoma ferrigenum Perner, 1911 † (FOSSIL)
filicinctus, Cyclonema filicinctus Whiteaves, 1904 † (FOSSIL)
fitchi, Strophostylus fitchi Hall, 1859 † (FOSSIL)
fluctuatum, Cyclonema bilix fluctuatum Conrad (FOSSIL)
formosum, Cyclonema formosum Perner, 1903 † (FOSSIL)
fornicatum, Spinyplatyceras fornicatum (Hall, 1862) † (FOSSIL)
fornicatum plurispinum, Spinyplatyceras fornicatum plurispinum (Fraunfelter, 1973) † (FOSSIL)
fragile, Compsonema fragile Gordon & Yochelson, 1983 † (FOSSIL)
galeritus, Platyceras galeritus (Whidborne, 1891) † (FOSSIL)
gaspense, Platyceras gaspense Clarke, 1908 † (FOSSIL)
gebhardi, Platyostoma gebhardi (Conrad, 1840) † (FOSSIL)
gemmuliferum, Rhineoderma gemmuliferum (Phillips, 1836) † (FOSSIL)
gibbosum, Platyceras gibbosum Hall, 1859 † (FOSSIL)
giganteum, Cyclonema giganteum Lindström, 1884 † - syn of: Oriostoma giganteum (Lindström, 1884) † (FOSSIL)
girtyi, Strophostylus girtyi (Knight, 1934) † (FOSSIL)
girtyi, Helictostylus girtyi Knight, 1934 † - syn of: Strophostylus girtyi (Knight, 1934) † (FOSSIL)
glabrata, Platyschisma glabrata Phillips, 1836 † - syn of: Tychonia glabrata (Phillips, 1836) † (FOSSIL)
glabrum, Platyceras carinatum glabrum Lindström (FOSSIL)
glenparkensis, Platyceras glenparkensis Weller, 1906 † (FOSSIL)
globosus, Strophostylus globosus Hall, 1859 † (FOSSIL)
gracile, Cyclonema gracile Ulrich & Scofield, 1897 † (FOSSIL)
gracilis, Platyceras gracilis Sandberger, 1842 † (FOSSIL)
graegaria, Praenatica graegaria Roemer, 1852 † - syn of: Praenatica naticoides (Roemer, 1852) † (FOSSIL)
granulosa, Turbonellina granulosa Gemmellaro, 1889 † (FOSSIL)
grayvillensis, Platyostoma grayvillensis Worthen, 1882 † (FOSSIL)
gregaria, Praenatica gregaria Perner, 1903 † - syn of: Praenatica naticoides (Roemer, 1852) † (FOSSIL)
guesnini, Platyceras guesnini Clarke, 1908 † (FOSSIL)
guilleri, Cyclonema guilleri Barrois, 1889 † (FOSSIL)
guillieri, Cyclonema guillieri Oehlert, 1877 † - syn of: Australonema guillieri (Oehlert, 1877) † (FOSSIL)
gyronemoides, Cyclonema gyronemoides Foerste, 1923 † (FOSSIL)
hageri, Cyclonema hageri Billings, 1865 † (FOSSIL)
hainensis, Platyceras hainensis Maurer, 1885 † (FOSSIL)
haliotis, Platyceras haliotis (de Sowerby & Murchison, 1839) † (FOSSIL)
haliotoides, Platyceras haliotoides Meek & Worthen, 1866 † (FOSSIL)
hallianum, Cyclonema hallianum Salter, 1859 † (FOSSIL)
hebes, Platyceras hebes Clarke, 1907 † (FOSSIL)
helicoides, Platyschisma helicoides (Sowerby, 1826) † (FOSSIL)
herzeri, Platyceras herzeri Winchell, 1871 † - syn of: Orthonychia herzeri (Winchell, 1871) † (FOSSIL)
hesdoensis, Keeneia hesdoensis (Sahni & Dutt, 1959) † (FOSSIL)
hiiumaa, Cyclonema hiiumaa Teichert, 1928 † (FOSSIL)
holzapfeli, Platyceras holzapfeli Spitz, 1907 † (FOSSIL)
hotwellsensis, Rhineoderma hotwellsensis Batten, 1966 † (FOSSIL)
humerosum, Cyclonema humerosum Ulrich & Scofield, 1897 † (FOSSIL)
humile, Platyostoma humile Billings, 1866 † (FOSSIL)
humilis, Platyostoma humilis Clarke & Swartz, 1913 † (FOSSIL)
humilis, Rhineoderma humilis Hall, 1856 † - syn of: Rhineoderma wortheni (Hall, 1856) † (FOSSIL)
humulus, Platyceras humulus Perner, 1911 † (FOSSIL)
immersum, Cyclonema immersum Spitz, 1907 † - syn of: Australonema immersum (Spitz, 1907) † (FOSSIL)
inaequistriatum, Cyclonema inaequistriatum Koken & Perner, 1925 † (FOSSIL)
incisum, Platyostoma incisum Chapman, 1916 † (FOSSIL)
indianense, Euthyrhachis indianense (Miller & Gurley, 1897) † (FOSSIL)
indica, Platyostoma indica Waagen, 1880 † (FOSSIL)
inequilaterale, Platyceras inequilaterale Barrois, 1889 † - syn of: Orthonychia inequilaterale (Barrois, 1889) † (FOSSIL)
infima, Platyschisma infima Perner, 1903 † (FOSSIL)
inflatum, Cyclonema inflatum Ulrich & Scofield, 1897 † (FOSSIL)
inflatus, Tubomphalus inflatus Perner, 1907 † (FOSSIL)
infrequens, Cyclonema infrequens Perner, 1907 † (FOSSIL)
inopinata, Cyclonema inopinata Perner, 1907 † (FOSSIL)
insolita, Platyostoma insolita Webster, 1906 † (FOSSIL)
intermedia, Rhabdocantha intermedia Fletcher, 1958 † (FOSSIL)
intermedium, Cyclonema intermedium (Bradley, 1930) † (FOSSIL)
interupta, Tachloconcha interupta (Perner, 1903) † (FOSSIL)
invictus, Platyostoma invictus (Whidborne, 1891) † (FOSSIL)
irrasum, Platyostoma irrasum Fenton & Fenton, 1924 † (FOSSIL)
janthinoides, Platyostoma janthinoides Oehlert, 1877 † (FOSSIL)
kahlebergensis, Platyceras kahlebergensis Beushausen, 1884 † (FOSSIL)
karlsteinensis, Cyclonema karlsteinensis Perner, 1903 † (FOSSIL)
kauffmani, Naticonema kauffmani Peel, 1975 † (FOSSIL)
kazanensis, Stuckenbergispira kazanensis Mazaev, 2015 † (FOSSIL)
kleistos, Nonorios kleistos Ebbestad & al., 2008 † (FOSSIL)
laevicostatum, Platyceras laevicostatum Knod, 1908 † (FOSSIL)
latum, Platyceras latum Keyes, 1888 † (FOSSIL)
laudabile, Cyclonema laudabile Perner, 1903 † (FOSSIL)
laudoni, Platyschisma laudoni Rollins, 1975 † (FOSSIL)
leavenworthana, Cyclonema leavenworthana Hall, 1856 † - syn of: Amaurotoma leavenworthana (Hall, 1856) † (FOSSIL)
leboutillieri, Platyceras leboutillieri Clarke, 1907 † (FOSSIL)
lejeunii, Platyceras lejeunii Clarke, 1908 † (FOSSIL)
lepida, Turbonellina lepida (de Koninck, 1843) † (FOSSIL)
lepidula, Cyclonema lepidula (Perner, 1903) † (FOSSIL)
leptonotum, Cyclonema leptonotum (Raymond, 1905) † (FOSSIL)
lilydalensis, Cyclonema lilydalensis Etheridge jr., 1891 † - syn of: Australonema lilydalensis (Etheridge jr., 1891) † (FOSSIL)
limatum, Cyclonema limatum Ulrich & Scofield, 1897 † (FOSSIL)
lineare, Platyceras lineare Kindle, 1900 † (FOSSIL)
lineata, Platyostoma lineata Conrad, 1842 † (FOSSIL)
lineata callosa, Platyostoma lineata callosa (Hall) † (FOSSIL)
lineatum, Cyclonema lineatum Koken, 1897 † (FOSSIL)
lingua, Platyschisma lingua Yoo, 1994 † (FOSSIL)
lirata, Barynema lirata (Hall, 1860) † (FOSSIL)
lodiensis, Palaeocapulus lodiensis Meek, 1871 † - syn of: Palaeocapulus acutirostre (Hall, 1856) † (FOSSIL)
loricatum, Platyostoma cornutum loricatum Lindström (FOSSIL)
lotzi, Paffrathia lotzi (Frýda, 1998) † (FOSSIL)
lutheri, Platyostoma lutheri Clarke, 1904 † (FOSSIL)
lydiamariarum, Cyclonema lydiamariarum Peel, 1975 † (FOSSIL)
magnificum, Platyceras magnificum Hall, 1859 † (FOSSIL)
mansfieldense, Platyceras mansfieldense Tassell, 1977 † (FOSSIL)
margaritifera, Natirhenia margaritifera (d'Archiac & de Verneuil, 1842) † (FOSSIL)
margaritoides, Cyclonema margaritoides (Whiteaves, 1897) † (FOSSIL)
marylandense, Cyclonema marylandense Prosser & Kindle, 1913 † (FOSSIL)
marylandicum, Platyceras marylandicum Clarke & Swartz, 1913 † (FOSSIL)
matheri, Strophostylus matheri Hall, 1859 † (FOSSIL)
mediale, Cyclonema mediale Ulrich & Scofield, 1897 † (FOSSIL)
milleri, Spinyplatyceras milleri (Nettelroth, 1889) † (FOSSIL)
mima, Ptychospirina mima (Perner, 1903) † (FOSSIL)
minor, Keeneia minor Fletcher, 1958 † - syn of: Keeneia ocula (Sowerby, 1838) † (FOSSIL)
minuta, Cyclonema minuta (Hall, 1845) † (FOSSIL)
minutum, Platyceras minutum Chapman, 1916 † (FOSSIL)
missouriensis, Platyschisma missouriensis Weller, 1899 † (FOSSIL)
modesta, Platyostoma modesta Webster, 1906 † (FOSSIL)
modestum, Cyclonema modestum Poulsen, 1974 † (FOSSIL)
montrealense, Cyclonema montrealense Billings, 1865 † (FOSSIL)
morsei, Palaeocapulus morsei Hoare, 2004 † (FOSSIL)
muitissima, Platyostoma muitissima Clarke, 1903 † (FOSSIL)
multilira, Barynema multilira Hall, 1859 † - syn of: Barynema multilirata (Hall, 1859) † (FOSSIL)
multilira, Cyclonema multilira Hall, 1859 † - syn of: Barynema multilirata (Hall, 1859) † (FOSSIL)
multilirata, Barynema multilirata (Hall, 1859) † (FOSSIL)
multiplicatus, Platyceras multiplicatus (Giebel, 1858) † (FOSSIL)
multispinosum, Spinyplatyceras multispinosum (Meek, 1873) † (FOSSIL)
multistriata, Cyclonema multistriata Clarke & Swartz, 1913 † - syn of: Kitikamispira multistriata (Clarke & Swartz, 1913) † (FOSSIL)
nasutum, Platyceras nasutum Miller, 1891 † (FOSSIL)
naticoides, Praenatica naticoides (Roemer, 1852) † (FOSSIL)
naticoides, Platyostoma naticoides Etheridge jr., 1878 † (FOSSIL)
naticoides, Strophostylus naticoides Hall, 1859 † (FOSSIL)
nebrascensis, Platyceras nebrascensis Meek, 1872 † - syn of: Ueckerconulus noricus Nützel & Erwin, 2004 † (FOSSIL)
neglecta, Lotzia neglecta (Phillips, 1841) † (FOSSIL)
nelsoni, Visitator nelsoni Dunbar, 1920 † - syn of: Visitator tennesseensis (Dunbar, 1920) † (FOSSIL)
nettersheimensis, Platyceras nettersheimensis Heidelberger, 2003 † (FOSSIL)
nevadensis, Strophostylus nevadensis Gordon & Yochelson, 1983 † (FOSSIL)
neverovoensis, Platyceras neverovoensis Mazaev, 1996 † (FOSSIL)
newberryi, Crossoceras newberryi (Hall, 1860) † (FOSSIL)
niagarensis, Platyostoma niagarensis (Hall, 1852) † (FOSSIL)
niagarensis, Platyceras niagarensis Hall, 1852 † (FOSSIL)
niagarensis, Naticonema niagarensis Hall, 1852 † - syn of: Platyostoma niagarensis (Hall, 1852) † (FOSSIL)
niagarensis, Cyclonema niagarensis Winchell & Marcy, 1866 † (FOSSIL)
nodosum, Platyceras nodosum Conrad, 1841 † (FOSSIL)
nodulostriata, Rhineoderma nodulostriata (Hall, 1856) † (FOSSIL)
nodulosum, Cyclonema nodulosum Lindström, 1884 † (FOSSIL)
nystii, Rhineoderma nystii de Koninck, 1883 † (FOSSIL)
obsolescens, Cyclonema obsolescens Hall, 1876 † (FOSSIL)
obtusus, Strophostylus obtusus Hall, 1859 † (FOSSIL)
occasa, Keeneia occasa Fletcher, 1958 † (FOSSIL)
ocula, Keeneia ocula (Sowerby, 1838) † (FOSSIL)
oehlerti, Platyceras oehlerti Spitz, 1907 † (FOSSIL)
orthostoma, Praenatica orthostoma (Barrois, 1889) † (FOSSIL)
otiosum, Platyceras otiosum Perner, 1903 † - syn of: Hoplotropites jokelyi (Hauer, 1855) † (FOSSIL)
ovoidea, Platyschisma ovoidea (Phillips, 1836) † (FOSSIL)
oxynotum, Platyceras oxynotum Girty, 1929 † (FOSSIL)
paralium, Platyceras paralium White & Whitfield, 1862 † (FOSSIL)
parasiticum, Platyceras parasiticum Trautschold, 1867 † (FOSSIL)
parvimedium, Cyclonema parvimedium McLearn, 1924 † (FOSSIL)
parvispinum, Spinyplatyceras parvispinum (Howell, 1945) † (FOSSIL)
parvum, Platyceras parvum Shumard & Swallow, 1858 † - syn of: Orthonychia parva Shumard & Swallow, 1858 † (FOSSIL)
pastillus, Platyostoma pastillus Clarke, 1909 † (FOSSIL)
patelliforme, Platyceras patelliforme Holzapfel, 1895 † (FOSSIL)
pater, Nonorios pater (Perner, 1903) † (FOSSIL)
pauper, Cyclonema pauper Hall, 1867 † - syn of: Oriostoma pauper (Hall, 1867) † (FOSSIL)
paxiller, Spinyplatyceras paxiller (Clarke, 1908) † (FOSSIL)
pectinata, Nonorios pectinata (Perner, 1903) † (FOSSIL)
percarinata, Cyclonema percarinata (Hall, 1847) † (FOSSIL)
perceense, Platyostoma perceense Clarke, 1908 † (FOSSIL)
percingulatum, Cyclonema percingulatum Billings, 1857 † (FOSSIL)
perforatum, Platyostoma perforatum Whiteaves, 1904 † (FOSSIL)
pericompsus, Platyceras pericompsus (Whidborne, 1891) † (FOSSIL)
permianus, Strophostylus permianus Beede, 1907 † - syn of: Naticopsis transversa (Beede, 1907) † (FOSSIL)
permocarbonicus, Stuckenbergispira permocarbonicus (Stuckenberg, 1898) † (FOSSIL)
perneri, Platyceras perneri Tolmachoff, 1930 † (FOSSIL)
perplexa, Obscuropsis perplexa Horný, 1992 † (FOSSIL)
persimile, Cyclonema persimile Spitz, 1907 † - syn of: Australonema persimile (Spitz, 1907) † (FOSSIL)
perstrialis, Cyclonema perstrialis Fenton & Fenton, 1924 † - syn of: Kitikamispira perstrialis (Fenton & Fenton, 1924) † (FOSSIL)
perversum, Cyclonema perversum Lindström, 1884 † - syn of: Onychochilus perversa Lindström, 1884 † (FOSSIL)
pervertens, Cyclonema pervertens Perner, 1903 † - syn of: Onychochilus pervertens (Perner, 1903) † (FOSSIL)
phaedra, Cyclonema phaedra Billings, 1865 † - syn of: Clathrospira phaedra (Billings, 1865) † (FOSSIL)
pharlapensis, Brokenriveria pharlapensis Cook & Camilleri, 1997 † (FOSSIL)
piasaensis, Rhineoderma piasaensis (Hall, 1856) † (FOSSIL)
pileum, Spinyplatyceras dumosum pileum Kindle (FOSSIL)
piso, Palaeocapulus piso (Walcott, 1884) † (FOSSIL)
planidorsata, Visitator planidorsata Dunbar, 1920 † - syn of: Visitator tennesseensis (Dunbar, 1920) † (FOSSIL)
platyschismoides, Keeneia platyschismoides Etheridge jr., 1902 † (FOSSIL)
platystomum, Platyceras platystomum Hall, 1859 † (FOSSIL)
plebeium, Platyostoma plebeium Hall, 1876 † (FOSSIL)
plebium, Platyostoma plebium Hall, 1876 † - syn of: Platyostoma plebeium Hall, 1876 † (FOSSIL)
plebium, Naticonema plebium Perner, 1903 † - syn of: Naticopsis plebeia Perner, 1903 † (FOSSIL)
pleurotoma, Platyostoma pleurotoma Hall, 1879 † (FOSSIL)
plicatile, Platyceras plicatile Hall, 1879 † (FOSSIL)
plicatile unguiformis, Platyceras plicatile unguiformis Hall, 1879 † (FOSSIL)
plurispinum, Spinyplatyceras fornicatum plurispinum Fraunfelter (FOSSIL)
praecipitum, Cyclonema praecipitum (Ulrich & Scofield, 1897) † (FOSSIL)
praecursor, Naticonema praecursor Koken & Perner, 1925 † - syn of: Holopea balticus Koken & Perner, 1925 † (FOSSIL)
prieuri, Naticonoda prieuri Heidelberger, 2001 † (FOSSIL)
princeps, Visitator princeps Dunbar, 1920 † - syn of: Visitator tennesseensis (Dunbar, 1920) † (FOSSIL)
princeps, Distemnostoma princeps Dunbar, 1920 † - syn of: Visitator tennesseensis (Dunbar, 1920) † (FOSSIL)
priscum, Platyceras priscum Goldfuss, 1844 † (FOSSIL)
pristina, Keeneia pristina Maxwell, 1964 † (FOSSIL)
producti, Platyceras producti Frech, 1911 † (FOSSIL)
proeva, Praenatica proeva Perner, 1903 † (FOSSIL)
protei, Platyceras protei Oehlert, 1883 † - syn of: Orthonychia protei (Oehlert, 1883) † (FOSSIL)
protendens, Ploconema protendens Perner, 1903 † (FOSSIL)
pugnus, Spinyplatyceras pugnus (Clarke, 1904) † (FOSSIL)
pulcherrimum, Platyceras pulcherrimum Rowley, 1908 † (FOSSIL)
pulchra, Turbonellina pulchra de Koninck, 1881 † (FOSSIL)
pyramidatum, Cyclonema pyramidatum James † (FOSSIL)
quadrangulare, Visitator quadrangulare Dunbar, 1920 † - syn of: Visitator tennesseensis (Dunbar, 1920) † (FOSSIL)
quadrilineatus, Spiranodus quadrilineatus Heidelberger, 2001 † (FOSSIL)
quinquecinctus, Spiranodus quinquecinctus (Goldfuss, 1844) † (FOSSIL)
radula, Rhineoderma radula (de Koninck, 1844) † (FOSSIL)
rarispinum, Spinyplatyceras dumosum rarispinum Hall (FOSSIL)
rarispinum, Platyceras rarispinum Hall, 1859 † - syn of: Spinyplatyceras dumosum rarispinum (Hall, 1859) † (FOSSIL)
reflexum, Platyceras reflexum Hall, 1859 † (FOSSIL)
repertum, Cyclonema repertum Reed † (FOSSIL)
rete, Platyceras rete Lamont † (FOSSIL)
richtum, Platyceras richtum Hall, 1879 † (FOSSIL)
rictum, Platyceras rictum Hall, 1862 † (FOSSIL)
rictum spinosum, Platyceras rictum spinosum Kindle, 1900 † (FOSSIL)
robustum, Platyceras robustum Hall, 1859 † (FOSSIL)
rohri, Cancellator rohri Frýda & Manda, 1997 † (FOSSIL)
rotunda, Paraplatyschisma rotunda (Etheridge, 1872) † (FOSSIL)
rotundatum, Platyostoma rotundatum Clarke, 1904 † (FOSSIL)
rotundatum, Platyschisma rotundatum Morris, 1845 † (FOSSIL)
rowei, Platyostoma rowei Clarke & Swartz, 1913 † (FOSSIL)
rugaelineata, Cyclonema rugaelineata Hall & Whitfield, 1872 † - syn of: Oriostoma rugaelineata (Hall & Whitfield, 1872) † (FOSSIL)
rugata, Cyclonema crebristria rugata Pitcher (FOSSIL)
rupestre, Cyclonema rupestre (Eichwald, 1856) † (FOSSIL)
rupestre sulcifera, Cyclonema rupestre sulcifera (Eichwald, 1840) † (FOSSIL)
sargalensis, Strophostylus sargalensis Reed, 1944 † (FOSSIL)
schaeferkalki, Lotzia schaeferkalki Heidelberger, 2001 † (FOSSIL)
senaria, Ptychospirina senaria Perner, 1907 † (FOSSIL)
sepulta, Turbomaria sepulta (Perner, 1903) † (FOSSIL)
servus, Cyclonema servus (Perner, 1903) † (FOSSIL)
sigmoidale, Platyceras sigmoidale Phillips, 1841 † (FOSSIL)
similare, Naticonema similare Perner, 1903 † (FOSSIL)
similaris, Naticonema similaris Perner, 1903 † (FOSSIL)
simulans, Cyclonema simulans Ulrich & Scofield, 1897 † (FOSSIL)
sinuatum, Platyceras sinuatum Hall, 1859 † (FOSSIL)
speciosum, Platyostoma speciosum (Sedgwick & Murchison, 1840) † (FOSSIL)
spinosa, Spinyplatyceras spinosa (Goldfuss, 1844) † (FOSSIL)
spinosum, Platyceras rictum spinosum Kindle (FOSSIL)
spirale, Platyceras spirale Hall, 1859 † (FOSSIL)
spirata, Platyostoma spirata (de Sowerby & Murchison, 1839) † (FOSSIL)
squammata, Naticonema squammata Perner, 1903 † - syn of: Naticonema similare Perner, 1903 † (FOSSIL)
squamosus, Platyceras squamosus Trenkner, 1868 † (FOSSIL)
statshiunaica, Cyclonema statshiunaica Saladzius, 1966 † (FOSSIL)
steinmanni, Platyceras steinmanni Clarke, 1899 † (FOSSIL)
striata, Turbonellina striata Gemmellaro, 1889 † (FOSSIL)
striatissima, Leptozone striatissima Reed, 1901 † - syn of: Prosolarium striatissimum (Reed, 1901) † (FOSSIL)
strophius, Platyostoma strophius Hall, 1862 † (FOSSIL)
suavis, Naticellina suavis (Perner, 1907) † (FOSSIL)
subcarbonaria, Rhineoderma subcarbonaria Keyes, 1894 † (FOSSIL)
subcirculare, Platyceras subcirculare Kindle † (FOSSIL)
subelegans, Platyceras subelegans Girty, 1910 † (FOSSIL)
subglobosa, Platyostoma subglobosa Stauffer, 1909 † (FOSSIL)
sublaeve, Cyclonema sublaeve Ulrich & Scofield, 1897 † (FOSSIL)
subrotundum, Platyceras subrotundum Snider, 1915 † (FOSSIL)
subumbonatum, Platyceras subumbonatum Northrop, 1939 † (FOSSIL)
subundata, Cyclonema subundata Northrop, 1939 † (FOSSIL)
sulcifera, Cyclonema sulcifera d'Eichwald, 1856 † (FOSSIL)
sulcifera, Cyclonema rupestre sulcifera Eichwald (FOSSIL)
sulphuriferum, Cyclonema sulphuriferum Perner, 1903 † (FOSSIL)
supralirata, Cyclonema supralirata Rohr & Smith, 1978 † (FOSSIL)
symmetricum, Platyceras symmetricum Hall, 1862 † (FOSSIL)
tantillus, Strophostylus tantillus Gordon & Yochelson, 1983 † (FOSSIL)
tennesseensis, Visitator tennesseensis (Dunbar, 1920) † (FOSSIL)
tennesseensis, Saffordella tennesseensis Dunbar, 1920 † - syn of: Visitator tennesseensis (Dunbar, 1920) † (FOSSIL)
tenuissimum, Cyclonema tenuissimum Lindström, 1884 † (FOSSIL)
terminalis, Platyceras terminalis (Whidborne, 1889) † (FOSSIL)
textilis, Cyclonema textilis (Miller, 1897) † (FOSSIL)
textilis, Strophostylus textilis Miller, 1897 † - syn of: Cyclonema textilis (Miller, 1897) † (FOSSIL)
thalia, Cyclonema thalia Billings, 1857 † (FOSSIL)
thetis, Platyceras thetis Hall, 1862 † (FOSSIL)
tiara, Platyschisma tiara Sowerby, 1829 † - syn of: Colpites tiara (Sowerby, 1829) † (FOSSIL)
timidum, Cyclonema timidum Perner, 1903 † (FOSSIL)
transversum, Cyclonema transversum Ulrich & Scofield, 1897 † (FOSSIL)
transversus, Strophostylus transversus Hall, 1859 † (FOSSIL)
trepidans, Cyclonema trepidans Perner, 1903 † (FOSSIL)
triangularis, Platyostoma triangularis Talent & Philip, 1956 † (FOSSIL)
trigonale, Platyceras trigonale Barrois, 1889 † - syn of: Orthonychia trigonale (Barrois, 1889) † (FOSSIL)
trigonus, Palaeocapulus trigonus (Goldfuss, 1844) † (FOSSIL)
trilobatum, Platyceras trilobatum Hall, 1859 † (FOSSIL)
trirotundolobatum, Platyceras trirotundolobatum Talent & Philip, 1956 † - syn of: Orthonychia trirotundolobatum (Talent & Philip, 1956) † (FOSSIL)
trojani, Platyceras trojani Blodgett & Johnson, 1992 † (FOSSIL)
tsuchidai, Cyclonema tsuchidai Endo, 1935 † - syn of: Fusispira tsuchidai (Endo, 1935) † (FOSSIL)
tumidum, Platyostoma tumidum Whiteaves, 1892 † (FOSSIL)
turbinata, Platyostoma turbinata (Hall, 1861) † (FOSSIL)
turgida, Spironemella turgida Waterhouse, 1987 † (FOSSIL)
turritum, Cyclonema turritum Lindström, 1884 † - syn of: Globonema turritum (Lindström, 1884) † (FOSSIL)
twelvetreesi, Keeneia twelvetreesi Dun, 1913 † (FOSSIL)
tylotus, Spinyplatyceras tylotus (Whidborne, 1891) † (FOSSIL)
typicum, Devononema typicum Fraunfelter, 1973 † (FOSSIL)
uncinatus, Platyceras uncinatus Roemer, 1852 † (FOSSIL)
undata, Palaeocapulus undata (Winchell, 1865) † (FOSSIL)
undata, Platyceras undata Hall, 1859 † (FOSSIL)
undifera, Cyclonema undifera (McCoy) † (FOSSIL)
undulatum, Platyceras undulatum Barrois, 1889 † - syn of: Orthonychia undulatum (Barrois, 1889) † (FOSSIL)
unguiformis, Platyceras plicatile unguiformis Hall (FOSSIL)
unica, Strophostylus unica Hall, 1862 † (FOSSIL)
unicus, Platyceras unicus Hall, 1879 † (FOSSIL)
unisulcata, Platyostoma unisulcata (Conrad, 1842) † (FOSSIL)
ussheri, Platyceras ussheri (Whidborne, 1891) † (FOSSIL)
varians, Ptychospirina varians (Hall, 1876) † (FOSSIL)
varians, Cyclonema varians Billings, 1857 † (FOSSIL)
varians, Strophostylus varians Hall, 1876 † - syn of: Ptychospirina varians (Hall, 1876) † (FOSSIL)
varicosum, Cyclonema varicosum Hall, 1861 † (FOSSIL)
varispirum, Cyclonema varispirum Twenhofel, 1928 † (FOSSIL)
ventricosa, Cyclonema ventricosa Hall, 1852 † (FOSSIL)
ventricosum, Platyostoma ventricosum Conrad, 1842 † (FOSSIL)
verisimile, Platyceras verisimile Reed † (FOSSIL)
verrucosum, Platyceras verrucosum Barrois, 1889 † (FOSSIL)
vetusta, Platyceras vetusta (Sowerby, 1829) † (FOSSIL)
villmarensis, Platyceras villmarensis Basse & Heidelberger, 2002 † (FOSSIL)
virginensis, Brokenriveria virginensis Cook & al., 2003 † (FOSSIL)
vitrea, Platyschisma vitrea Yoo, 1994 † (FOSSIL)
vrazensis, Nonorios vrazensis Perner, 1903 † - syn of: Nonorios pater (Perner, 1903) † (FOSSIL)
vulgaris, Euthyrhachis vulgaris (Perner, 1907) † (FOSSIL)
wellingtonensis, Cyclonema wellingtonensis Etheridge jr., 1898 † - syn of: Australonema wellingtonensis (Etheridge jr., 1898) † (FOSSIL)
wisconsinense, Platyceras wisconsinense Ulrich & Scofield, 1897 † - syn of: Helcionopsis wisconsinensis Ulrich & Scofield, 1897 † (FOSSIL)
wortheni, Rhineoderma wortheni (Hall, 1856) † (FOSSIL)
wortheni, Platyostoma wortheni Conrad, 1842 † (FOSSIL)
wortheni, Strophostylus wortheni Weller, 1916 † (FOSSIL)
yochelsoni, Platyceras yochelsoni Kulas & Batten, 1997 † (FOSSIL)
zinkeni, Platyceras zinkeni Römer, 1843 † (FOSSIL)
zonatum, Cyclonema zonatum Lindström, 1884 † - syn of: Oriostoma zonatum (Lindström, 1884) † (FOSSIL)
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