Classification of Cisterna and Simanauskas 2000

G. †Costatumulus Waterhouse 1983
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†Costatumulus sparsispinosus Cooper and Grant 1975
G. †Kochiproductus Dunbar 1955
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†Kochiproductus riojanus Leanza 1948
G. †Neochonetes Muir-Wood 1962
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†Neochonetes pegnonensis Cisterna and Simanauskas 2000
G. †Tivertonia Archbold 1983
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G. †Trigonotreta Koenig 1825
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†Trigonotreta riojanensis Lech and Aceñolaza 1987