Classification of Cocks 2010
Or. †Strophomenida Opik 1934
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Superfm. †Plectambonitoidea Jones 1928
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Fm. †Leptellinidae Ulrich and Cooper 1936
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Subfm. †Palaeostrophomeninae Cocks and Rong 1989
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G. †Palaeostrophomena Holtedahl 1916
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†Palaeostrophomena canalis Lockley 1980
†Palaeostrophomena concava Holtedahl 1916
Fm. †Sowerbyellidae Opik 1930
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Subfm. †Sowerbyellinae Opik 1930
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G. †Anisopleurella Cooper 1956
G. †Eoplectodonta Kozlowski 1929
G. †Sowerbyella Jones 1928
Invalid names: Xenambonitidae Cooper 1956 [empty]
Superfm. †Strophomenoidea King 1846
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Fm. †Christianiidae Williams 1953
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G. †Christiania Hall and Clarke 1892
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†Christiania hollii Davidson 1871
†Christiania subquadrata Hall 1883
Fm. †Rafinesquinidae Schuchert 1893
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Subfm. †Rafinesquininae Schuchert 1893
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G. †Colaptomena Cooper 1956
G. †Hedstroemina Bancroft 1929
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†Hedstroemina fragilis Bancroft 1929
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Invalid names: Hedstroemina callawayiana Davidson 1883 [replaced], Hedstroemina parva Bancroft 1929 [synonym], Hedstroemina robusta Bancroft 1929 [synonym]
G. †Kjaerina Bancroft 1929
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†Kjaerina bipartita Salter 1854
†Kjaerina complanata de Sowerby and Murchison 1839
†Kjaerina jonesi Bancroft 1929
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Invalid names: Kjaerina horderleyensis Bancroft 1929 [synonym], Kjaerina intermedia Bancroft 1929 [synonym], Kjaerina latericostata Cocks 2010 [synonym], Kjaerina richteri Bancroft 1929 [synonym]
†Kjaerina typa Bancroft 1929
G. †Kjerulfina Bancroft 1929
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†Kjerulfina polycyma Bancroft 1929
†Kjerulfina trigonalis Bancroft 1929
Fm. †Strophomenidae King 1846
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Subfm. †Strophomeninae King 1846
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G. †Bellimurina Cooper 1956
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Subg. †Bellimurina (Bellimurina) Cooper 1956
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†Bellimurina (Bellimurina) charlottae Winchell and Schuchert 1892
†Bellimurina (Bellimurina) incommoda Williams 1963
Subg. †Leptaena (Leptaena) Dalman 1828
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†Leptaena (Leptaena) rugosa Dalman 1828
†Leptaena (Leptaena) salopiensis Williams 1963
†Leptaena (Leptaena) tenuistriata de Sowerby and Murchison 1839
†Leptaena (Leptaena) ventricosa Williams 1963
Subg. †Kiaeromena (Kiaeromena) Spjeldnaes 1957
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†Kiaeromena (Kiaeromena) harperi Cocks 2010
†Kiaeromena (Kiaeromena) kjerulfi Holtedahl 1916
†Kiaeromena (Kiaeromena) ungula McCoy 1851
Subg. †Eoplectodonta (Eoplectodonta) Kozlowski 1929
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†Eoplectodonta (Eoplectodonta) abigailae Cocks 2010
†Eoplectodonta (Eoplectodonta) lenis Whittington and Williams 1955
†Eoplectodonta (Eoplectodonta) precursor Jones 1928
Subg. †Leangella (Leptestiina) Opik 1933
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†Leangella (Leptestiina) derfelensis Jones 1928
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†Leangella (Leptestiina) derfelensis oepiki Whittington 1938
Subg. †Sowerbyella (Sowerbyella) Jones 1928
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†Sowerbyella (Sowerbyella) multipartita Williams and Cocks 1978
†Sowerbyella (Sowerbyella) musculosa Williams 1963
†Sowerbyella (Sowerbyella) sericea Sowerby 1839
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†Sowerbyella (Sowerbyella) sericea permixta Williams 1963
†Sowerbyella (Sowerbyella) soudleyensis Jones 1928
†Leangella (Leangella) scissa Davidson 1871
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†Leangella (Leangella) scissa triangularis Holtedahl 1916
†Colaptomena expansa de Sowerby and Murchison 1839
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†Colaptomena expansa prolata Williams 1963