Classification of Klinger and Kennedy 1989
Subor. †Ammonitina Hyatt 1889
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Superfm. †Hoplitaceae Douvillé 1890
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Fm. †Placenticeratidae Hyatt 1900
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G. †Hoplitoplacenticeras Paulcke 1906
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†Hoplitoplacenticeras howarthi Collignon 1970
†Hoplitoplacenticeras plasticus Paulcke 1907
G. †Placenticeras Meek 1876
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†Placenticeras kaffrarium Etheridge 1904
†Placenticeras vredenburgi Sarkar 1966
Fm. †Engonoceratidae Hyatt 1900
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G. †Hypengonoceras Spath 1922
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†Hypengonoceras decaryi Collignon 1963
†Hypengonoceras warthi Kossmat 1895