Linked from
The 6 pages that link to Mesohippus, each with the reason it gives.
PerissodactylaBroader topic: Its limbs and teeth document changes within the equid lineage.
EquidaeBroader topic: Mesohippus shows an intermediate stage in the family’s anatomical history.
HoofBroader topic: Its multiple toes illustrate an earlier stage in horse-foot evolution.
EohippusBroader topic: Its reduced toe count illustrates a later stage in equid evolution.
HipparionRelated: Its three-toed limbs provide an earlier comparison for Hipparion's anatomy.