临夏盆地晚新生代哺乳动物化石丰富,之前的研究将其概括为晚渐新世巨犀动物群、中中新世铲齿象动物群、晚中新世三趾马动物群,以及早更新世真马动物群,尤以三趾马动物群和真马动物群的物种之丰富,保存之完好,闻名于世。近期,研究者对和政县高家山发现的三趾马颊齿以及头骨材料进行了详细的描述对比,将其鉴定为福氏三趾马(Hipparion forstenae)和平颊三趾马(H.hippidiodus),这是福氏三趾马 The Late Cenozoic Linxian Basin mammals rich in fossils, previous studies will be summarized as late Oligocents rhinoceros fauna, the Middle Miocene shovel tooth like fauna, late Miocene Trigonella fauna, and Early Pleistocene True horse fauna, especially the three-toed horse fauna and flora of the real horse rich, well-preserved, known. Recently, the researchers compared and described in detail the cheek teeth and skull materials of the Hipparion forstenae and H. hippidiodus found in Gaozhishan, Hezheng County. This is the Forbidden Horse