Allonychia
jamesi
(F.B. Meek, 1872 †)
(FOSSIL)

Ambonychia
alata
F.B. Meek, 1872 †
(FOSSIL)

Ambonychia
cultrata
Ulrich, 1893 †
(FOSSIL)

Ambonychia
intermedia
F.B. Meek & A.H. Worthen †
(FOSSIL)

Ambonychia
obesa
Ulrich, 1895 †
(FOSSIL)

Ambonychia
orbicularis
(E. Emmons, 1842 †)
(FOSSIL)

Ambonychia
volitans
Barrande, 1881 †
(FOSSIL)

Ambonychia
erecta
J.W. Hall, 1861 †
(FOSSIL)

Ambonychia
aphaea
J.J.F. Whiteaves, 1905 †
(FOSSIL)

Ambonychia
praecursa
Ulrich 1893 †
(FOSSIL)

Ambonychia
borealis
Foerste 1924 †
(FOSSIL)

Ambonychia
grandis
Ulrich 1893 †
(FOSSIL)

Ambonychia
radiata
J.W. Hall 1847 †
(FOSSIL)

Ambonychia
richmondensis
Ulrich 1893 †
(FOSSIL)

Ambonychia
suberecta
Ulrich 1893 †
(FOSSIL)

Ambonychia
vera
Ulrich 1893 †
(FOSSIL)

Ambonychia
carinata
(G.A. Goldfuss, 1836 †)
(FOSSIL)

Ambonychia
acuticostata
F. McCoy, 1851 †
(FOSSIL)

Ambonychia
arundinea
Tunnicliff, 1982 †
(FOSSIL)

Ambonychinia
corrugata
Isberg, 1934 †
(FOSSIL)

Ambonychinia
cylindrica
Isberg, 1934 †
(FOSSIL)

Ambonychinia
demissa
Isberg, 1934 †
(FOSSIL)

Ambonychinia
elegans
Isberg, 1934 †
(FOSSIL)

Ambonychinia
excelsa
Isberg, 1934 †
(FOSSIL)

Ambonychinia
extumida
Isberg, 1934 †
(FOSSIL)

Ambonychinia
glabra
Isberg, 1934 †
(FOSSIL)

Ambonychinia
intermedia
Isberg, 1934 †
(FOSSIL)

Ambonychinia
kallholniensis
Isberg, 1934 †
(FOSSIL)

Ambonychinia
kullsbergensis
Isberg, 1934 †
(FOSSIL)

Ambonychinia
levis
Isberg, 1934 †
(FOSSIL)

Ambonychinia
magna
Isberg, 1934 †
(FOSSIL)

Ambonychinia
megumbona
Isberg, 1934 †
(FOSSIL)

Ambonychinia
pediculata
Isberg, 1934 †
(FOSSIL)

Ambonychinia
quadrangulata
Isberg, 1934 †
(FOSSIL)

Ambonychinia
quadrata
(Hind, 1910 †)
(FOSSIL)

Ambonychinia
radiata
Isberg, 1934 †
(FOSSIL)

Ambonychinia
rhomboidalis
Isberg, 1934 †
(FOSSIL)

Ambonychinia
semistriata
Isberg, 1934 †
(FOSSIL)

Ambonychinia
skalbergensis
Isberg, 1934 †
(FOSSIL)

Ambonychinia
striata
Isberg, 1934 †
(FOSSIL)

Ambonychinia
subiniqua
Isberg, 1934 †
(FOSSIL)

Ambonychinia
subrotunda
Isberg, 1934 †
(FOSSIL)

Ambonychinia
undulata
Isberg, 1934 †
(FOSSIL)

Ambonychinia
unisulcata
Isberg, 1934 †
(FOSSIL)

Ambonychinia
volvens
Isberg, 1934 †
(FOSSIL)

Ambonychiopsis
mclearni
Northrop, 1939 †
(FOSSIL)

Ambonychiopsis
prolifica
(Billings, 1866 †)
(FOSSIL)

Ambonychiopsis
waylandsmithi
Fisher, 1957 †
(FOSSIL)

Ambonychiopsis
affinis
(Ulrich, 1894 †)
(FOSSIL)

Ambonychiopsis
bellistriata
(J.W. Hall, 1847 †)
(FOSSIL)

Ambonychiopsis
curvata
(W.J. Raymond, 1905 †)
(FOSSIL)

Ambonychiopsis
kallholniensis
Isberg, 1934 †
(FOSSIL)

Ambonychiopsis
osmundsbergensis
Isberg, 1934 †
(FOSSIL)

Ambonychiopsis
planistriata
(J.W. Hall, 1861 †)
(FOSSIL)

Amphicoelia
leidyi
J.W. Hall, 1865 †
(FOSSIL)

Amphicoelia
pojetana
Kríž, 2008 †
(FOSSIL)

Amphicoelia
transplicata
Isberg, 1934 †
(FOSSIL)

Amphicoelia
ulrichi
C.J. Maynard, 1913 †
(FOSSIL)

Byssopteria
radiata
J.W. Hall, 1883 †
(FOSSIL)

Claudeonychia
byrnesi
(Ulrich, 1895 †)
(FOSSIL)

Claudeonychia
laticostata
(Ulrich, 1895 †)
(FOSSIL)

Claudeonychia
notabilis
(Ulrich, 1895 †)
(FOSSIL)

Cleionychia
corrugata
(Lindström, 1880 †)
(FOSSIL)

Cleionychia
crebra
Khalfin, 1958 †
(FOSSIL)

Cleionychia
crispa
Khalfin, 1958 †
(FOSSIL)

Cleionychia
curta
Foerste, 1924 †
(FOSSIL)

Cleionychia
excavata
Ulrich, 1895 †
(FOSSIL)

Cleionychia
gibbosa
J.J.F. Whiteaves, 1908 †
(FOSSIL)

Cleionychia
lamellosa
(R.P. Whitfield, 1882 †)
(FOSSIL)

Cleionychia
marginalis
W.J. Raymond, 1905 †
(FOSSIL)

Cleionychia
montrealensis
(Billings, 1859 †)
(FOSSIL)

Cleionychia
mytiloides
(J.W. Hall, 1847 †)
(FOSSIL)

Cleionychia
ottawaensis
J.J.F. Whiteaves, 1908 †
(FOSSIL)

Cleionychia
oviformis
Kobayashi, 1934 †
(FOSSIL)

Cleionychia
primitiva
Isberg, 1934 †
(FOSSIL)

Cleionychia
pulchella
(Lindstrom, 1880 †)
(FOSSIL)

Cleionychia
subundata
Ulrich, 1895 †
(FOSSIL)

Cleionychia
superba
(Billings, 1866 †)
(FOSSIL)

Cleionychia
traingularis
Raasch in Shrock & Raasch, 1937 †
(FOSSIL)

Cleionychia
rhomboidea
Ulrich, 1892 †
(FOSSIL)

Cleionychia
undata
(E. Emmons, 1842 †)
(FOSSIL)

Cleionychia
angusta
(Foerste, 1918 †)
(FOSSIL)

Cleionychia
miseneri
Ulrich, 1893 †
(FOSSIL)

Cleionychia
incognita
Tunniliff, 1982 †
(FOSSIL)

Cleionychia
transversa
(Portlock, 1843 †)
(FOSSIL)

Gosseletia
halfari
Frech, 1891 †
(FOSSIL)

Gosseletia
retusa
J.W. Hall, 1883 †
(FOSSIL)

Gosseletia
triquetra
(T.A. Conrad, 1838 †)
(FOSSIL)

Gosseletia
tawneyi
Reed, 1917 †
(FOSSIL)

Gosseletia
halfari
Frech, 1891 †
(FOSSIL)

Gosseletia
retusa
J.W. Hall, 1883 †
(FOSSIL)

Gosseletia
triquetra
(T.A. Conrad, 1838 †)
(FOSSIL)

Gosseletia
tawneyi
Reed, 1917 †
(FOSSIL)

Lophonychia
trigonale
(Cleland, 1911 †)
(FOSSIL)

Mytilarca
triquetra
T.A. Conrad, 1838 †
(FOSSIL)

Mytilarca
acutirostra
(J.W. Hall, 1865 †)
(FOSSIL)

Mytilarca
amii
McLearn, 1924 †
(FOSSIL)

Mytilarca
aphaea
(J.W. Hall, 1865 †)
(FOSSIL)

Mytilarca
arenacea
J.W. Hall & R.P. Whitfield, 1869 †
(FOSSIL)

Mytilarca
boucoti
Kriz & al., 2011 †
(FOSSIL)

Mytilarca
canadensis
Billings, 1874 †
(FOSSIL)

Mytilarca
chemungensis
(T.A. Conrad, 1842 †)
(FOSSIL)

Mytilarca
cingulosa
Pohl, 1929 †
(FOSSIL)

Mytilarca
cordiformis
(J.W. Hall, 1859 †)
(FOSSIL)

Mytilarca
crassa
Isberg, 1934 †
(FOSSIL)

Mytilarca
cultellata
Pohl, 1929 †
(FOSSIL)

Mytilarca
cuneatus
Kindle & M. Breger, 1903 †
(FOSSIL)

Mytilarca
dalhousei
A.H. Clarke, 1907 †
(FOSSIL)

Mytilarca
dentata
Pohl, 1929 †
(FOSSIL)

Mytilarca
dentiversa
Isberg, 1934 †
(FOSSIL)

Mytilarca
dubia
Walcott, 1884 †
(FOSSIL)

Mytilarca
eduliformis
A.H. Clarke & Ruedemann, 1903 †
(FOSSIL)

Mytilarca
expansa
Isberg, 1934 †
(FOSSIL)

Mytilarca
foerstei
A.H. Clarke & Ruedemann, 1903 †
(FOSSIL)

Mytilarca
gibbosa
J.W. Hall, 1884 †
(FOSSIL)

Mytilarca
inflata
J.J.F. Whiteaves, 1892 †
(FOSSIL)

Mytilarca
iniqua
Isberg, 1934 †
(FOSSIL)

Mytilarca
kallholniensis
Isberg, 1934 †
(FOSSIL)

Mytilarca
knappi
J.W. Hall, 1884 †
(FOSSIL)

Mytilarca
kullsbergensis
Isberg, 1934 †
(FOSSIL)

Mytilarca
lata
J.W. Hall, 1883 †
(FOSSIL)

Mytilarca
leptaenarum
Isberg, 1934 †
(FOSSIL)

Mytilarca
mareki
Kríž & Steinová, 2009 †
(FOSSIL)

Mytilarca
marylandica
Ohern in Ohern & C.J. Maynard, 1913 †
(FOSSIL)

Mytilarca
mytiliformis
(J.W. Hall, 1852 †)
(FOSSIL)

Mytilarca
obliqua
Weller, 1903 †
(FOSSIL)

Mytilarca
orsae
Isberg, 1934 †
(FOSSIL)

Mytilarca
parallela
Isberg, 1934 †
(FOSSIL)

Mytilarca
parens
Barrande, 1881 †
(FOSSIL)

Mytilarca
percarinata
R.P. Whitfield, 1882 †
(FOSSIL)

Mytilarca
ponderosa
J.W. Hall & R.P. Whitfield, 1869 †
(FOSSIL)

Mytilarca
pyrimadata
J.W. Hall, 1883 †
(FOSSIL)

Mytilarca
regularis
J.W. Hall, 1883 †
(FOSSIL)

Mytilarca
semicircularis
Isberg, 1934 †
(FOSSIL)

Mytilarca
sigilla
J.W. Hall, 1876 †
(FOSSIL)

Mytilarca
simplex
J.W. Hall, 1883 †
(FOSSIL)

Mytilarca
suberectus
Ohern in Ohern & C.J. Maynard, 1913 †
(FOSSIL)

Mytilarca
thorslundi
Isberg, 1934 †
(FOSSIL)

Mytilarca
triangula
Isberg, 1934 †
(FOSSIL)

Mytilarca
umbonata
J.W. Hall, 1883 †
(FOSSIL)

Mytilarca
wabashensis
Kindle & M. Breger, 1904 †
(FOSSIL)

Mytilarca
lineatus
Reed 1944 †
(FOSSIL)

Mytilarca
rowei
Ohern in Ohern & C.J. Maynard 1913 †
(FOSSIL)

Mytilarca
siluriana
Reed, 1927 †
(FOSSIL)

Opisthoptera
casei
(F.B. Meek & A.H. Worthen, 1866 †)
(FOSSIL)

Opisthoptera
gouldi
(Ulrich in Hussey, 1926 †)
(FOSSIL)

Opisthoptera
griffini
Hussey, 1926 †
(FOSSIL)

Paramytilarca
levis
Isberg, 1934 †
(FOSSIL)

Paramytilarca
oblonga
Isberg, 1934 †
(FOSSIL)

Paramytilarca
oviformis
Isberg, 1934 †
(FOSSIL)

Paramytilarca
quadrangula
Isberg, 1934 †
(FOSSIL)

Paramytilarca
umbonella
Isberg, 1934 †
(FOSSIL)

Paramytilarca
ventricosa
Isberg, 1934 †
(FOSSIL)