Classification of Longstaff 1933
G. †Microptychis Longstaff 1912
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†Microptychis constricta Sowerby 1821
†Microptychis pygmaea Longstaff 1933
†Microptychis wrighti Longstaff 1912
G. †Zygopleura
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†Zygopleura benniana Longstaff 1933
†Zygopleura longnorensis Longstaff 1933
†Zygopleura redensis Longstaff 1933
†Zygopleura robroystonensis Longstaff 1933
†Zygopleura roscobiensis Longstaff 1933
†Zygopleura rugifera Phillips 1836
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†Zygopleura rugifera cylindracea Longstaff 1933
†Zygopleura rugifera rowlandsi Longstaff 1933
†Zygopleura scalaroides Phillips 1836
†Zygopleura sulculosa Phillips 1836
G. †Platyconcha Longstaff 1933
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†Platyconcha dunlopiana Longstaff 1933
†Platyconcha hindi Longstaff 1933
Fm. †Loxonematidae Koken 1889
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