Desmatolagus is an extinct genus of early lagomorph first named in 1923.W. D. Matthew and W. Granger. 1923. Nine new rodents from the Oligocene of Mongolia. American Museum Novitates 102:1-10
In 1940, the genus Agispelagus was described for the species A. simplex, to which a second species A. youngi was added in 1960. However, A. youngi was later determined to be a junior synonym of Desmatolagus robustus, and A. simplex was subsequently reassigned to the same genus, leaving Agispelagus a junior synonym of Desmatolagus.
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