Classification of Xu 1996

G. †Nannasfiber Xu 1996
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Fm. Castoridae Gray 1821 [beaver]
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G. †Capacikala Macdonald 1963
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Capacikala gradatus Cope 1878
Capacikala parvus Xu 1996
G. †Capatanka Macdonald 1963
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Capatanka cankpeopi Macdonald 1963
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Invalid names: Euhapsis gaulodon Matthew 1907 [synonym]
Capatanka minor Xu 1996
G. †Euhapsis Peterson 1905
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Euhapsis luskensis Xu 1996
G. †Fossorcastor Martin 1987
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Fossorcastor fossor Peterson 1905
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Invalid names: Palaeocastor magnus Romer and McCormack 1928 [synonym], Palaeocastor major Stirton 1935 [synonym], Steneofiber simplicidens Matthew 1907 [synonym]
G. †Palaeocastor Leidy 1869
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Invalid names: Steneofiber sciuroides Matthew 1907 [synonym]