封面说明：西班牙羚及其生态复原图。西班牙羚是一种小型羚羊，角心比其他类型的瞪羚更加扭转。西班牙羚化石曾发现于晚中新世的地中海周边及南亚等地。最近在甘肃庆阳正宁代店晚中新世中期地层中发现了中国首批西班牙羚化石，定名为陇东西班牙羚(Hispanodorcas longdongica)。陇东西班牙羚的发现，为晚中新世中期欧亚大陆中纬度地区形成连续的类似于萨瓦纳稀树草原的生态群落从而导致高度相似的哺乳动物群的产生提供了证据。另外，陇东西班牙羚在已知的西班牙羚各种中，形态相对原始，时代也较早，表明其代表了西班牙羚属演化的早期阶段。详见本期吴勇等人文。(绘图：叶健豪)
Cover image: Reconstruction of Hispanodorcas and their living environments. Hispanodorcas is a small, Gazella-like antelope, of which the horncores are more twisted than other types of gazelles. Hispanodorcas have been found from the Late Miocene of pan-Mediterranean areas and South Asia. Recently, the first Hispanodorcas of China were discovered from the middle Late Miocene strata of the Daidian locality, Qingyang City, Gansu Province, and were named Hispanodorcas longdongica. The discovery of H. longdongica provides further evidence for the existence of a continuous savanna-like biome between the eastern and western parts of the mid-latitude zone of Eurasia that resulted in a high faunal similarity along this corridor during the Late Miocene. In addition, the H. longdongica exhibits relatively primitive morphology among known species, and the age is also relatively earlier, suggesting that Hispanodorcas longdongica represents the early stage of the evolution of the genus. See details in the paper of Wu et al. (Illustrated by Ye Jianhao)
