Notostylops ("South Pillar Face") is a genus of extinct South American ungulate from the Eocene.
In life, Notostylops would have resembled a dog-sized rabbit and is suspected to have browsed on low-growing plants. Notostylops was a generalised animal, likely adapted to a fairly wide range of ecological niches. Its tall skull housed rodent-like incisor teeth. Notostylops was about 75 centimetres (30 in) long.