Classification of the genus Hadragnostus
G. †Hadragnostus Opik 1967
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†Hadragnostus modestus Lochman 1944
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Invalid names: Formosagnostus latus Peng 1987 [synonym], Kunshanagnostus kunshanensis Qian and Zhou 1984 [synonym]
†Hadragnostus quadratiformis Ergaliev and Ergaliev 2008
Invalid names: Kunshanagnostus Qian and Zhou 1984 [synonym]