Classification of Hoare 1961
G. †Gosseletina Fischer 1885
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†Gosseletina persimplex Girty 1915
†Gosseletina spironema Meek and Worthen 1866
G. †Eoptychia Longstaff 1933
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†Eoptychia intermittens Hoare 1961
†Eoptychia trochus Knight 1930
G. †Hemizyga Girty 1915
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G. †Ianthinopsis Meek and Worthen 1866
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†Ianthinopsis klipparti Meek 1871
†Ianthinopsis paludinaeformis Hall 1858
†Ianthinopsis primogenius Conrad 1835
†Ianthinopsis regularis Cox 1857
G. †Meekospira Ulrich and Scofield 1897
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†Meekospira peracuta Meek and Worthen 1860
G. †Pseudozygopleura Knight 1930
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†Pseudozygopleura scitula Meek and Worthen 1860
G. †Soleniscus Meek and Worthen 1860
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†Soleniscus typicus Meek and Worthen 1860
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Invalid names: Loxonema nitidula Meek and Worthen 1860 [synonym]
G. †Donaldina Knight 1933
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†Donaldina robusta Stevens 1858
†Donaldina stevensana Meek and Worthen 1866
G. †Owenoceras Miller and Furnish 1940
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†Owenoceras bellilineatum Miller and Owen 1939
G. Solemya Children 1823
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†Solemya radiata Meek and Worthen 1860
†Solemya trapezoides Meek 1874
G. †Parallelodon Meek and Worthen 1866
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†Parallelodon obsoletus Meek 1871
†Parallelodon sangamonensis Worthen 1890
G. †Annuliconcha Newell 1938
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†Annuliconcha interlineata Meek and Worthen 1860
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Invalid names: Posidonomya lasallensis Miller and Gurley 1896 [synonym]
G. †Pernopecten Winchell 1865
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†Pernopecten attenuatus Herrick 1887
†Pernopecten aviculatus Shumard and Swallow 1858
†Pernopecten ohioensis Newell 1938
G. †Streblochondria Newell 1938
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†Streblochondria infelix Girty 1908
†Streblochondria tenuilineata Meek and Worthen 1860
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Invalid names: Crenipecten foerstii Herrick 1887 [synonym]
G. †Schizodus King 1844
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†Schizodus affinis Herrick 1887
†Schizodus amplus Meek and Worthen 1870
G. †Astartella Hall 1858
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†Astartella compacta Girty 1915
†Astartella concentrica Conrad 1842
G. †Edmondia de Koninck 1841
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†Edmondia aspinwallensis Meek 1871
†Edmondia ovata Meek and Worthen 1873
G. Lingula Bruguiére 1797
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†Lingula carbonaria Shumard and Swallow 1858
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Invalid names: Lingula mytiloides Meek and Worthen 1873 [synonym], Lingula umbonata White 1884 [synonym]
Cl. †Articulata Huxley 1869
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Invalid names: Rostrospiracea Schuchert 1929 [empty]
G. †Rhipidomella
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†Rhipidomella carbonaria Shumard and Swallow 1858
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Invalid names: Rhipidomella pecosi Marcou 1858 [synonym]
G. †Wellerella Dunbar and Condra 1932
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†Wellerella osagensis Shumard and Swallow 1858
†Wellerella tetrahedra Dunbar and Condra 1932
G. †Neospirifer Fredericks 1919
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†Neospirifer cameratus Morton 1836
†Neospirifer latus Dunbar and Condra 1932
G. †Spirifer Sowerby 1818
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†Spirifer opimus Hall 1858
†Spirifer rockymontanus Marcou 1858
Superor. †Caenogastropoda Cox 1959
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Fm. †Pseudorthoceratidae Flower and Caster 1935
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Fm. †Aviculopectinidae Meek 1864
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Fm. †Grammysiidae Miller 1877
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G. †Cardiomorpha de Koninck 1844
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†Cardiomorpha missouriensis Shumard and Swallow 1858
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Invalid names: Nucula cylindrica McChesney 1859 [synonym], Nucula mercerensis McChesney 1868 [synonym]
Fm. Mytilidae Rafinesque 1815 [mussel]
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Fm. Pteriidae Gray 1847 [pearl oyster]
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Fm. †Pleurophoridae Dall 1903
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G. †Pleurophorus King 1844
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†Pleurophorus occidentalis Meek and Hayden 1864
†Pleurophorus tropidophorus Meek 1875
Fm. †Spiriferidae King 1846
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Fm. †Dictyoclostidae Stehli 1954
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G. †Antiquatonia Miloradovich 1945
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†Antiquatonia gallatinensis Girty 1899
†Antiquatonia hermosanus Girty 1899
†Antiquatonia portlockiana Norwood and Pratten 1855
G. †Desmoinesia Hoare 1960
G. †Linoproductus Chao 1927
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†Linoproductus distortus Hoare 1960
†Linoproductus planiventralis Hoare 1960
G. †Reticulatia Muir-Wood and Cooper 1960
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†Reticulatia huecoensis King 1931
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Invalid names: Dictyoclostus americanus Dunbar and Condra 1932 [synonym]
†Reticulatia tiawahensis Hoare 1960
Subg. †Bellerophon (Pharkidonotus) Girty 1912
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†Bellerophon (Pharkidonotus) percarinatus Conrad 1842
Subg. †Knightites (Retispira) Knight 1945
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†Knightites (Retispira) nodulifera Hoare 1961
†Knightites (Retispira) tenuilineata Gurley 1884
Fm. †Tainoceratidae Hyatt 1883
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Subg. †Straparollus (Amphiscapha) Knight 1942
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†Straparollus (Amphiscapha) subrugosus Meek and Worthen 1873
Subg. †Glabrocingulum (Ananias) Knight 1945
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†Glabrocingulum (Ananias) nodocostatus Hoare 1961
†Glabrocingulum (Ananias) welleri Newell 1935
Subg. †Naticopsis (Jedria) Yochelson 1953
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†Naticopsis (Jedria) meeki Knight 1933
†Naticopsis (Jedria) ventricosa Norwood and Pratten 1855
Subg. †Palaeostylus (Stephanozyga) Knight 1930
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†Palaeostylus (Stephanozyga) subnodosa Knight 1930
Subg. †Palaeostylus (Pseudozygopleura) Knight 1930
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†Palaeostylus (Pseudozygopleura) assertonsoris Knight 1930
†Palaeostylus (Pseudozygopleura) condrai Knight 1930
†Palaeostylus (Pseudozygopleura) eucharis Hoare 1961
†Palaeostylus (Pseudozygopleura) moorei Knight 1930
†Palaeostylus (Pseudozygopleura) pluricostata Knight 1930
†Palaeostylus (Pseudozygopleura) schucherti Knight 1930
†Palaeostylus (Pseudozygopleura) semicostatus Meek 1871
Subg. †Hemizyga (Plocezyga) Knight 1930
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†Hemizyga (Plocezyga) convertacostata Hoare 1961
†Hemizyga (Plocezyga) percostata Knight 1930
†Hemizyga (Plocezyga) tenuilirata Knight 1930
Fm. †Disciniidae Gray 1840
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G. †Orbiculoidea d'Orbigny 1847
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†Orbiculoidea missouriensis Shumard 1858
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Invalid names: Discina manhattanensis Meek and Hayden 1858 [synonym]
Subg. †Hemizyga (Hemizyga) Girty 1915
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†Hemizyga (Hemizyga) elegans Girty 1915
†Hemizyga (Hemizyga) inflata Knight 1930
†Chonetinella flemingi Dunbar and Condra 1932
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†Chonetinella flemingi crassiradiata Dunbar and Condra 1932
†Mesolobus mesolobus Norwood and Pratten 1855
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†Mesolobus mesolobus decipiens Girty 1912
†Mesolobus mesolobus euampygus Girty 1912
†Mesolobus mesolobus lioderma Dunbar and Condra 1932
Subg. †Bellerophon (Bellerophon) de Montfort 1808
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†Bellerophon (Bellerophon) planodorsatum Hoare 1961
Subg. †Nucula (Nuculopsis) Girty 1912
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†Nucula (Nuculopsis) subrotundata Morningstar 1922
Subg. †Naticopsis (Naticopsis) M'Coy 1844
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†Naticopsis (Naticopsis) nana Meek and Worthen 1860
†Neospirifer triplicatus Hall 1852
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†Neospirifer triplicatus alatus Dunbar and Condra 1932
Superfm. †Punctospiracea Shimer and Shrock 1944
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Fm. †Spiriferinidae Davidson 1884
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Fm. †Ephippioceratidae Miller and Youngquist 1949
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Subg. †Trepospira (Trepospira) Ulrich and Scofield 1897
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†Trepospira (Trepospira) minima Hoare 1961
Subg. †Glabrocingulum (Glabrocingulum) Thomas 1940
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†Glabrocingulum (Glabrocingulum) grayvillense Norwood and Pratten 1855
Subg. †Murchisonia (Murchisonia) d'Archiac and de Verneuil 1841
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†Murchisonia (Murchisonia) missouriensis Girty 1915