Classification of Krawczyński 2002
Fm. †Holopeidae Wenz 1938
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G. †Roemeriella Blodgett and Frýda 1999
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†Roemeriella cyclostomoides Römer 1850
†Roemeriella octocincta Römer 1843
Subg. †Palaeozygopleura (Rhenozyga) Frýda 2000
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†Palaeozygopleura (Rhenozyga) retrostriata Kirchner 1915
Fm. †Plagiothyridae Knight 1956
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Subg. †Loxoplocus (Donaldiella) Cossmann 1903
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†Loxoplocus (Donaldiella) karczewskii Krawczyński 2002
Subg. †Straparollus (Straparollus) de Montfort 1810
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†Straparollus (Straparollus) circularis Phillips 1841
†Straparollus (Straparollus) serpens Phillips 1841
Subg. †Naticopsis (Naticopsis) M'Coy 1844
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†Naticopsis (Naticopsis) excentrica Römer 1843
†Naticopsis (Naticopsis) inflata Römer 1843