Genus: Aspideretes HAY, 1904
Etymology: Greek, aspidos, "round shield"; referering to the carapace outline, Greek, eretes,"oars," referring to the ends of the costal ribs.

Species: sagatus HAY, 1908
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Species: singularis HAY, 1908
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Species: amnigenus HAY, 1910 (nomen dubium)
= Trionyx amnigenus (HAY, 1910) HUMMEL, 1932 (nomen dubium
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Holotype: USNM 6574

Locality: Section 12, T 20 N, R22 E, Boreman County, South Dakota.

Horizon: Lance Formation.

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Age: Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: 2 costal fragments
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Species: reesidei GILMORE, 1919
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Species: vegetus GILMORE, 1919
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Species: quadratus GILMORE, 1919
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Species: perplexus GILMORE, 1919
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Species: alashanensis YEH, 1965
Etymology: In reference to Alshan, Inner Mongolia (Nei Monglia), China.

Holotype: IVPP V2865

Locality: Dashukou, Maortu, Alxa, Inner Mongolia (Alshan, Inner Mongolia [Nei Monglia]), China.

Horizon: Dashuigou (Tashuikou) Formation.

Biostratigraphy:

Age: Late Cretaceous.

Material: Carapace with broken anterior portion but retaining a damaged nuchal.
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