Classification of the subgenus Murchisonia (Hypergonia)
G. †Hypergonia Donald 1892
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†Hypergonia agraciada Kues and Batten 2001
†Hypergonia attenuata Hall 1856
†Hypergonia baldwinensis Thein and Nitecki 1974
†Hypergonia deplanata Donald 1895
†Hypergonia elongata Yoo 1988
†Hypergonia hoffmani Kues and Batten 2001
†Hypergonia illinoiensis Weller 1916
†Hypergonia kirkbyi Donald 1892
†Hypergonia marvinwelleri Thein and Nitecki 1974
†Hypergonia mcoyi Donald 1895
†Hypergonia percarinata Longstaff 1926
†Hypergonia percostata Girty 1939
†Hypergonia prolixa White and Whitfield 1862
†Hypergonia quadricarinata M'Coy 1844
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Invalid names: Donaldina tenuis de Koninck 1883 [synonym], Stegocoelia (Hypergonia) pentonensis Donald 1892 [synonym]
†Hypergonia tatei Donald 1892
†Hypergonia tenuis Yoo 1988
†Hypergonia turritella Hall 1856
†Hypergonia vermicula Hall 1856
†Hypergonia youngiana Donald 1895
†Murchisonia (Hypergonia) fastigiata Donald 1895
†Stegocoelia (Hypergonia) acuminata de Koninck 1883
†Stegocoelia (Hypergonia) cincta Donald 1895
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Invalid names: Stegocoelia (Hypergonia) acuticarinata Longstaff 1926 [synonym]
†Stegocoelia (Hypergonia) jonathanensis Hoare 2004
†Stegocoelia (Hypergonia) korobkovi Licharev 1975