Complex sentence: The evolutionary divergence between the herpestids and the euplerids dates back to the Oligocene; at that time, feliforms shared many similarities, particularly between the cats and the viverrids.
Split into simpler sentences: The evolutionary divergence between the herpestids and the euplerids dates back to the Oligocene;. At that time, feliforms shared many similarities, particularly between the cats and the viverrids.