Abstract: In 1961, Xue Xiangxu and Wang Yongyan collected a lot of mammalian fossils from Bajiazui of Qingyang County, Gansu Province. The fossils come from the sandy beds in the bottom of the section, including Canis chihliensis, Meles cf. M chiai, Hyaena cf. H. licenti, Megateron sp., Epimachairodus sp., E. cf. E. crenatidens, Felis sp., Hipparion cf. H. sinensis, Sus cf. S. lydekkeri, Megaloceros sp., Cervus sp., Gazella sp., G. cf. G. sinensis, Bison palaeosinensis, Bovidae indet., Uospalax cf. M. arvicolinus, and M. tingi, etc. (Wang et al., 1966, 1982). Among the materials there are many skulls, mandibles, cheek teeth and limb bones of the genus Equus. A new species of Equus is described in this paper. NWUV is the prefix to the vertebrate fossils in Departnent of Geology, Northwest University.

摘要： 记述的庆阳马新种(Equus qingyangensis sp.nov.)是一种中等大小的真马，生活于早更新世泥河湾期。庆阳马的材料相当丰富，包括大量头骨、颊齿和肢骨化石，标本采自甘肃庆阳巴家嘴。新种肢骨的纤细度小于欧亚大陆和北美已知的早期真马，它的原始特征还包括浅的眶前窝、沿鼻骨中缝的深沟、长的上颊齿原尖和深的下颊齿外谷等。庆阳马以中等的尺寸和纤细的肢骨显著区别于华北地区广泛分布的大型而粗壮的三门马(E. sanmeniensis)。