-
pauxillus Gingerich, 1994 H. powelli**** Cope, 1884 H.
pygmaeus Cope, 1871 H.
sholemi Krishtalka, 1979 H.
simplex Loomis, 1905 H.
tonksi Eaton, 1982 H. uintensi...
- †Hydrangea
knowltoni †Hydromystria †Hydromystria
expansa †Hyopsodus †Hyopsodus
sholemi †Hypertragulus †Hypertragulus
calcaratus †Hypisodus †Hypisodus minimus...