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acuticostata, Ambonychia acuticostata McCoy, 1851 † (FOSSIL)
acutirostra, Mytilarca acutirostra (Hall, 1865) † (FOSSIL)
acutirostris, Elasmodophora acutirostris Isberg, 1934 † (FOSSIL)
acutirostris, Ambonychia acutirostris Ulrich, 1895 † (FOSSIL)
affinis, Ambonychiopsis affinis (Ulrich, 1894) † (FOSSIL)
alata, Ambonychia alata Meek, 1872 † (FOSSIL)
alternata, Opisthoptera alternata Ulrich, 1895 † (FOSSIL)
amii, Mytilarca amii McLearn, 1924 † (FOSSIL)
amygdalina, Ambonychinia amygdalina (Hall, 1847) † (FOSSIL)
angusta, Cleionychia angusta (Foerste, 1918) † (FOSSIL)
angusta, Anoptera angusta Foerste, 1918 † - syn of: Cleionychia angusta (Foerste, 1918) † (FOSSIL)
aphaea, Mytilarca aphaea (Hall, 1865) † (FOSSIL)
aphaea, Ambonychia aphaea Whiteaves, 1905 † - syn of: Mytilarca aphaea (Hall, 1865) † (FOSSIL)
aphea, Mytilarca aphea Hall, 1865 † - syn of: Mytilarca aphaea (Hall, 1865) † (FOSSIL)
apicalis, Ambonychia apicalis Ulrich, 1895 † - syn of: Ambonychia acutirostris Ulrich, 1895 † (FOSSIL)
arenacea, Mytilarca arenacea Hall & Whitfield, 1869 † (FOSSIL)
arundinea, Ambonychia arundinea Tunnicliff, 1982 † (FOSSIL)
attenuata, Cleionychia attenuata (Hall, 1847) † (FOSSIL)
attenuata, Mytilarca attenuata Hall & Whitfield, 1869 † - syn of: Mytilarca chemungensis (Conrad, 1842) † (FOSSIL)
babini, Claudeonychia babini Pojeta Jr., 1997 † (FOSSIL)
bellistriata, Ambonychiopsis bellistriata (Hall, 1847) † (FOSSIL)
borealis, Ambonychia borealis Foerste, 1924 † (FOSSIL)
boucoti, Mytilarca boucoti Kriz & al., 2011 † (FOSSIL)
byrnesi, Claudeonychia byrnesi (Ulrich, 1895) † (FOSSIL)
canadensis, Mytilarca canadensis Billings, 1874 † (FOSSIL)
carinata, Ambonychia carinata (Goldfuss, 1836) † (FOSSIL)
casei, Opisthoptera casei (Meek & Worthen, 1866) † (FOSSIL)
chemungensis, Mytilarca chemungensis (Conrad, 1842) † (FOSSIL)
cingulosa, Mytilarca cingulosa Pohl, 1929 † (FOSSIL)
concordensis, Maryonychia concordensis (Foerste, 1910) † (FOSSIL)
cordata, Lophonychia cordata Stewart, 1933 † (FOSSIL)
cordiformis, Mytilarca cordiformis (Hall, 1859) † (FOSSIL)
corrugata, Cleionychia corrugata (Lindström, 1880) † (FOSSIL)
corrugata, Ambonychinia corrugata Isberg, 1934 † (FOSSIL)
costata, Amphicoelia costata Hall & Whitfield, 1875 † (FOSSIL)
crassa, Mytilarca crassa Isberg, 1934 † (FOSSIL)
crebra, Cleionychia crebra Khalfin, 1958 † (FOSSIL)
crispa, Cleionychia crispa Khalfin, 1958 † (FOSSIL)
cultellata, Mytilarca cultellata Pohl, 1929 † (FOSSIL)
cultrata, Ambonychia cultrata Ulrich, 1893 † (FOSSIL)
cuneatus, Mytilarca cuneatus Kindle & Breger, 1903 † (FOSSIL)
curta, Cleionychia curta Foerste, 1924 † (FOSSIL)
curvata, Ambonychiopsis curvata (Raymond, 1905) † (FOSSIL)
cylindrica, Ambonychinia cylindrica Isberg, 1934 † (FOSSIL)
dalecarlica, Praeanomalodonta dalecarlica Isberg, 1934 † (FOSSIL)
dalhousei, Mytilarca dalhousei Clarke, 1907 † (FOSSIL)
demissa, Ambonychiopsis demissa (Conrad, 1842) † (FOSSIL)
demissa, Ambonychinia demissa Isberg, 1934 † (FOSSIL)
dentata, Mytilarca dentata Pohl, 1929 † (FOSSIL)
dentiversa, Mytilarca dentiversa Isberg, 1934 † (FOSSIL)
devonica, Gosseletia devonica Barrois, 1882 † (FOSSIL)
distincta, Gosseletia distincta Follmann, 1885 † - syn of: Gosseletia triquetra (Conrad, 1838) † (FOSSIL)
doylei, Leconychia doylei Pojeta & Gilbert-Tomlinson, 1977 † (FOSSIL)
dubia, Mytilarca dubia Walcott, 1884 † (FOSSIL)
eduliformis, Mytilarca eduliformis Clarke & Ruedemann, 1903 † (FOSSIL)
elegans, Ambonychinia elegans Isberg, 1934 † (FOSSIL)
emmae, Notonychia emmae Sánchez, 2001 † (FOSSIL)
erecta, Ambonychia erecta Hall, 1861 † - syn of: Cleionychia lamellosa (Whitfield, 1882) † (FOSSIL)
erecta, Clionychia erecta Hall, 1861 † - syn of: Cleionychia lamellosa (Whitfield, 1882) † (FOSSIL)
excavata, Cleionychia excavata Ulrich, 1895 † (FOSSIL)
excelsa, Ambonychinia excelsa Isberg, 1934 † (FOSSIL)
expansa, Mytilarca expansa Isberg, 1934 † (FOSSIL)
extenuata, Opisthoptera extenuata Ulrich, 1895 † - syn of: Opisthoptera alternata Ulrich, 1895 † (FOSSIL)
extumida, Ambonychinia extumida Isberg, 1934 † (FOSSIL)
fissicosta, Opisthoptera fissicosta Meek & Worthen, 1866 † - syn of: Opisthoptera casei (Meek & Worthen, 1866) † (FOSSIL)
flanaganensis, Allonychia flanaganensis Foerste, 1914 † (FOSSIL)
foerstei, Mytilarca foerstei Clarke & Ruedemann, 1903 † (FOSSIL)
foerstei, Praeanomalodonta foerstei Isberg, 1934 † (FOSSIL)
gibbosa, Mytilarca gibbosa Hall, 1884 † (FOSSIL)
gibbosa, Cleionychia gibbosa Whiteaves, 1908 † (FOSSIL)
gigantea, Anomalodonta gigantea Miller, 1874 † (FOSSIL)
glabra, Ambonychinia glabra Isberg, 1934 † (FOSSIL)
glabra, Paramytilarca glabra Isberg, 1934 † (FOSSIL)
gouldi, Opisthoptera gouldi (Ulrich, 1926) † (FOSSIL)
gouldi, Opistholoba gouldi Ulrich, 1926 † - syn of: Opisthoptera gouldi (Ulrich, 1926) † (FOSSIL)
grandis, Ambonychia grandis Ulrich, 1893 † (FOSSIL)
griffini, Opisthoptera griffini Hussey, 1926 † (FOSSIL)
halfari, Gosseletia halfari Frech, 1891 † (FOSSIL)
haupti, Pteronychia haupti Pojeta & Gilbert-Tomlinson, 1977 † (FOSSIL)
incognita, Cleionychia incognita Tunniliff, 1982 † (FOSSIL)
inflata, Mytilarca inflata Whiteaves, 1892 † (FOSSIL)
iniqua, Mytilarca iniqua Isberg, 1934 † (FOSSIL)
intermedia, Ambonychinia intermedia Isberg, 1934 † (FOSSIL)
intermedia, Ambonychia intermedia Meek & Worthen † (FOSSIL)
intermedia, Byssonychia intermedia Meek & Worthen † - syn of: Ambonychia intermedia Meek & Worthen † (FOSSIL)
jamesi, Allonychia jamesi (Meek, 1872) † (FOSSIL)
kallholniensis, Ambonychinia kallholniensis Isberg, 1934 † (FOSSIL)
kallholniensis, Ambonychiopsis kallholniensis Isberg, 1934 † (FOSSIL)
kallholniensis, Mytilarca kallholniensis Isberg, 1934 † (FOSSIL)
knappi, Mytilarca knappi Hall, 1884 † (FOSSIL)
kullsbergensis, Ambonychinia kullsbergensis Isberg, 1934 † (FOSSIL)
kullsbergensis, Mytilarca kullsbergensis Isberg, 1934 † (FOSSIL)
lamellosa, Cleionychia lamellosa (Whitfield, 1882) † (FOSSIL)
lata, Mytilarca lata Hall, 1883 † (FOSSIL)
laticostata, Claudeonychia laticostata (Ulrich, 1895) † (FOSSIL)
leidyi, Amphicoelia leidyi Hall, 1865 † (FOSSIL)
leptaenarum, Mytilarca leptaenarum Isberg, 1934 † (FOSSIL)
levis, Ambonychinia levis Isberg, 1934 † (FOSSIL)
levis, Paramytilarca levis Isberg, 1934 † (FOSSIL)
lineatus, Mytilarca lineatus Reed, 1944 † (FOSSIL)
magna, Ambonychinia magna Isberg, 1934 † (FOSSIL)
mareki, Mytilarca mareki Kríž & Steinová, 2009 † (FOSSIL)
marginalis, Cleionychia marginalis Raymond, 1905 † (FOSSIL)
marylandica, Mytilarca marylandica Ohern, 1913 † (FOSSIL)
mclearni, Ambonychiopsis mclearni Northrop, 1939 † (FOSSIL)
megumbona, Ambonychinia megumbona Isberg, 1934 † (FOSSIL)
minor, Gosseletia minor Frech, 1891 † - syn of: Gosseletia triquetra (Conrad, 1838) † (FOSSIL)
miseneri, Cleionychia miseneri Ulrich, 1893 † (FOSSIL)
montrealensis, Cleionychia montrealensis (Billings, 1859) † (FOSSIL)
mytiliformis, Mytilarca mytiliformis (Hall, 1852) † (FOSSIL)
mytiloides, Cleionychia mytiloides (Hall, 1847) † (FOSSIL)
nitida, Cleionychia nitida Ulrich, 1894 † - syn of: Cleionychia lamellosa (Whitfield, 1882) † (FOSSIL)
nitida, Ambonychia nitida Ulrich, 1894 † - syn of: Cleionychia lamellosa (Whitfield, 1882) † (FOSSIL)
nitida, Mytilarca nitida Ulrich, 1894 † - syn of: Cleionychia lamellosa (Whitfield, 1882) † (FOSSIL)
notabilis, Claudeonychia notabilis (Ulrich, 1895) † (FOSSIL)
obesa, Ambonychia obesa Ulrich, 1895 † (FOSSIL)
obliqua, Opisthoptera obliqua Ulrich, 1895 † - syn of: Opisthoptera alternata Ulrich, 1895 † (FOSSIL)
obliqua, Mytilarca obliqua Weller, 1903 † (FOSSIL)
oblonga, Paramytilarca oblonga Isberg, 1934 † (FOSSIL)
occidentalis, Byssopteria occidentalis Fenton & Fenton, 1924 † (FOSSIL)
orbicularis, Ambonychia orbicularis (Emmons, 1842) † (FOSSIL)
orsae, Mytilarca orsae Isberg, 1934 † (FOSSIL)
osmundsbergensis, Ambonychiopsis osmundsbergensis Isberg, 1934 † (FOSSIL)
ottawaensis, Cleionychia ottawaensis Whiteaves, 1908 † (FOSSIL)
oviformis, Paramytilarca oviformis Isberg, 1934 † (FOSSIL)
oviformis, Cleionychia oviformis Kobayashi, 1934 † (FOSSIL)
parallela, Mytilarca parallela Isberg, 1934 † (FOSSIL)
parens, Mytilarca parens Barrande, 1881 † (FOSSIL)
paucicostata, Ambonychia paucicostata Ulrich, 1895 † - syn of: Ambonychia acutirostris Ulrich, 1895 † (FOSSIL)
pediculata, Ambonychinia pediculata Isberg, 1934 † (FOSSIL)
percarinata, Mytilarca percarinata Whitfield, 1882 † (FOSSIL)
pernoides, Mytilarca pernoides Whiteaves, 1905 † - syn of: Mytilarca aphaea (Hall, 1865) † (FOSSIL)
planistriata, Ambonychiopsis planistriata (Hall, 1861) † (FOSSIL)
pojetana, Amphicoelia pojetana Kríž, 2008 † (FOSSIL)
ponderosa, Mytilarca ponderosa Hall & Whitfield, 1869 † (FOSSIL)
praecursa, Ambonychia praecursa Ulrich, 1893 † (FOSSIL)
primitiva, Cleionychia primitiva Isberg, 1934 † (FOSSIL)
prolifica, Ambonychiopsis prolifica (Billings, 1866) † (FOSSIL)
pulchella, Cleionychia pulchella (Lindstrom, 1880) † (FOSSIL)
pyrimadata, Mytilarca pyrimadata Hall, 1883 † (FOSSIL)
quadrangula, Paramytilarca quadrangula Isberg, 1934 † (FOSSIL)
quadrangulata, Ambonychinia quadrangulata Isberg, 1934 † (FOSSIL)
quadrata, Ambonychinia quadrata (Hind, 1910) † (FOSSIL)
radiata, Ambonychia radiata Hall, 1847 † (FOSSIL)
radiata, Byssopteria radiata Hall, 1883 † (FOSSIL)
radiata, Ambonychinia radiata Isberg, 1934 † (FOSSIL)
regularis, Mytilarca regularis Hall, 1883 † (FOSSIL)
retortus, Plethomytilus retortus Whidborne, 1892 † (FOSSIL)
retusa, Gosseletia retusa Hall, 1883 † (FOSSIL)
rhomboidalis, Ambonychinia rhomboidalis Isberg, 1934 † (FOSSIL)
rhomboidea, Cleionychia rhomboidea Ulrich, 1892 † (FOSSIL)
richmondensis, Ambonychia richmondensis Ulrich, 1893 † (FOSSIL)
rowei, Mytilarca rowei Ohern, 1913 † (FOSSIL)
schizodon, Gosseletia schizodon Frech, 1891 † - syn of: Gosseletia triquetra (Conrad, 1838) † (FOSSIL)
scutulata, Praeanomalodonta scutulata Isberg, 1934 † (FOSSIL)
securiformis, Gosseletia securiformis Follmann, 1885 † - syn of: Gosseletia triquetra (Conrad, 1838) † (FOSSIL)
semicircularis, Mytilarca semicircularis Isberg, 1934 † (FOSSIL)
semistriata, Ambonychinia semistriata Isberg, 1934 † (FOSSIL)
sigilla, Mytilarca sigilla Hall, 1876 † (FOSSIL)
siluriana, Mytilarca siluriana Reed, 1927 † (FOSSIL)
simplex, Mytilarca simplex Hall, 1883 † (FOSSIL)
skalbergensis, Ambonychinia skalbergensis Isberg, 1934 † (FOSSIL)
striata, Ambonychinia striata Isberg, 1934 † (FOSSIL)
suberecta, Ambonychia suberecta Ulrich, 1893 † (FOSSIL)
suberectus, Mytilarca suberectus Ohern, 1913 † (FOSSIL)
subiniqua, Ambonychinia subiniqua Isberg, 1934 † (FOSSIL)
subrotunda, Ambonychinia subrotunda Isberg, 1934 † (FOSSIL)
subundata, Cleionychia subundata Ulrich, 1895 † (FOSSIL)
superba, Cleionychia superba (Billings, 1866) † (FOSSIL)
tawneyi, Gosseletia tawneyi Reed, 1917 † (FOSSIL)
thorslundi, Mytilarca thorslundi Isberg, 1934 † (FOSSIL)
traingularis, Cleionychia traingularis Raasch, 1937 † (FOSSIL)
transplicata, Amphicoelia transplicata Isberg, 1934 † (FOSSIL)
transplicata, Anomalocoelia transplicata Isberg, 1934 † (FOSSIL)
transversa, Cleionychia transversa (Portlock, 1843) † (FOSSIL)
triangula, Mytilarca triangula Isberg, 1934 † (FOSSIL)
trigonale, Lophonychia trigonale (Cleland, 1911) † (FOSSIL)
triquetra, Gosseletia triquetra (Conrad, 1838) † (FOSSIL)
triquetra, Mytilarca triquetra Conrad, 1838 † - syn of: Gosseletia triquetra (Conrad, 1838) † (FOSSIL)
ulrichi, Psilonychia ulrichi Isberg, 1934 † (FOSSIL)
ulrichi, Amphicoelia ulrichi Maynard, 1913 † (FOSSIL)
umbonata, Mytilarca umbonata Hall, 1883 † (FOSSIL)
umbonella, Paramytilarca umbonella Isberg, 1934 † (FOSSIL)
undata, Cleionychia undata (Emmons, 1842) † (FOSSIL)
undulata, Ambonychinia undulata Isberg, 1934 † (FOSSIL)
unisulcata, Ambonychinia unisulcata Isberg, 1934 † (FOSSIL)
ventricosa, Paramytilarca ventricosa Isberg, 1934 † (FOSSIL)
vera, Ambonychia vera Ulrich, 1893 † (FOSSIL)
vetula, Silurinka vetula Kriz, 2005 † (FOSSIL)
volitans, Ambonychia volitans Barrande, 1881 † (FOSSIL)
volvens, Ambonychinia volvens Isberg, 1934 † (FOSSIL)
wabashensis, Mytilarca wabashensis Kindle & Breger, 1904 † (FOSSIL)
waylandsmithi, Ambonychiopsis waylandsmithi Fisher, 1957 † (FOSSIL)
wilsoni, Glyptonychia wilsoni Pojeta & Gilbert-Tomlinson, 1977 † (FOSSIL)
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