Orthonychia
alata
Laube, 1869 †
(FOSSIL)

Orthonychia
aculeata
Barrois, 1889 †
(FOSSIL)

Orthonychia
acuta
F.A. Roemer, 1856 †
(FOSSIL)

Orthonychia
baldwini
Rohr & al., 1981 †
(FOSSIL)

Orthonychia
belli
A.H. Clarke, 1908 †
(FOSSIL)

Orthonychia
bowsheri
E.L. Yochelson, 1956 †
(FOSSIL)

Orthonychia
campanulata
Barrois, 1889 †
(FOSSIL)

Orthonychia
chesterense
F.B. Meek & A.H. Worthen, 1867 †
(FOSSIL)

Orthonychia
concavum
J.W. Hall, 1859 †
(FOSSIL)

Orthonychia
conicum
J.W. Hall, 1859 †
(FOSSIL)

Orthonychia
conoideum
(Barrois, 1889 †)
(FOSSIL)

Orthonychia
cornuforme
Winchell, 1863 †
(FOSSIL)

Orthonychia
cornuta
Tschernischeff, 1885 †
(FOSSIL)

Orthonychia
costata
Barrois, 1889 †
(FOSSIL)

Orthonychia
daschi
Rohr & Smith, 1978 †
(FOSSIL)

Orthonychia
dentalium
J.W. Hall, 1862 †
(FOSSIL)

Orthonychia
dubium
(Barrois, 1889 †)
(FOSSIL)

Orthonychia
egorovi
Mazaev, 1996 †
(FOSSIL)

Orthonychia
elegans
J. Perner, 1903 †
(FOSSIL)

Orthonychia
enorme
(Lindström, 1884 †)
(FOSSIL)

Orthonychia
extensum
(Barrois, 1889 †)
(FOSSIL)

Orthonychia
gracilis
Mansuy, 1913 †
(FOSSIL)

Orthonychia
herzeri
(Winchell, 1871 †)
(FOSSIL)

Orthonychia
inequilaterale
(Barrois, 1889 †)
(FOSSIL)

Orthonychia
infabricatus
Hyde, 1953 †
(FOSSIL)

Orthonychia
jeffersonensis
Weller, 1906 †
(FOSSIL)

Orthonychia
marblecreekensis
Talent & Philip, 1956 †
(FOSSIL)

Orthonychia
mayesense
Snider, 1915 †
(FOSSIL)

Orthonychia
obliquesulcata
Spitz, 1907 †
(FOSSIL)

Orthonychia
pajerensis
Chronic, 1949 †
(FOSSIL)

Orthonychia
parva
Shumard & Swallow, 1858 †
(FOSSIL)

Orthonychia
parvulum
J.J.F. Whiteaves, 1892 †
(FOSSIL)

Orthonychia
pentalvea
Talent & Philip, 1956 †
(FOSSIL)

Orthonychia
perplexum
J.W. Hall, 1879 †
(FOSSIL)

Orthonychia
prosseri
A.H. Clarke & Swartz, 1913 †
(FOSSIL)

Orthonychia
protei
(Oehlert, 1883 †)
(FOSSIL)

Orthonychia
puellaris
(Whidborne, 1891 †)
(FOSSIL)

Orthonychia
quadrangularis
Whidborne, 1891 †
(FOSSIL)

Orthonychia
rostratus
(Trenkner, 1868 †)
(FOSSIL)

Orthonychia
rotunda
Whidborne, 1896 †
(FOSSIL)

Orthonychia
sciotoensis
Hyde, 1953 †
(FOSSIL)

Orthonychia
sileni
Oehlert, 1883 †
(FOSSIL)

Orthonychia
subrectum
J.W. Hall, 1859 †
(FOSSIL)

Orthonychia
talon
Tolmachoff, 1930 †
(FOSSIL)

Orthonychia
tortuosa
J.W. Hall, 1859 †
(FOSSIL)

Orthonychia
trigonale
(Barrois, 1889 †)
(FOSSIL)

Orthonychia
trirotundolobatum
(Talent & Philip, 1956 †)
(FOSSIL)

Orthonychia
undulatum
(Barrois, 1889 †)
(FOSSIL)

Orthonychia
unguiculata
A.H. Clarke & Swartz, 1913 †
(FOSSIL)

Orthonychia
ungula
Weller, 1906 †
(FOSSIL)

Orthonychia
variablis
Tyler, 1965 †
(FOSSIL)

Orthonychia
vishtytica
Saladzius, 1966 †
(FOSSIL)

Orthonychia
vomerium
(Winchell, 1863 †)
(FOSSIL)

Orthonychia
wanneri
Delpey, 1941 †
(FOSSIL)

Orthonychia
waverlyensis
Hyde, 1953 †
(FOSSIL)

Orthonychia
aroostooki
Williams & M. Breger, 1916 †
(FOSSIL)

Orthonychia
ivanovi
Mazaev, 1996 †
(FOSSIL)

Orthonychia
occidens
Walcott, 1884 †
(FOSSIL)

Orthonychia
conoidea
G.A. Goldfuss, 1844 †
(FOSSIL)

Orthonychia
compressa
Williams & M. Breger, 1916 †
(FOSSIL)

Orthonychia
undata
Winchell, 1865 †
(FOSSIL)

Orthonychia
abundans
J. Wanner, 1922 †
(FOSSIL)

Orthonychia
acutirostris
J.W. Hall, 1856 †
(FOSSIL)

Orthonychia
compressum
Girty, 1910 †
(FOSSIL)

Orthonychia
erectum
J.W. Hall 1843 †
(FOSSIL)

Orthonychia
hebes
J.W. Hall 1843 †
(FOSSIL)

Orthonychia
lodiensis
J.W. Hall 1843 †
(FOSSIL)

Orthonychia
morsei
J.W. Hall 1843 †
(FOSSIL)