甘肃省平凉市灵台县梁原乡东门化石点产出数量丰富哺乳动物化石, 动物群计有6科9属9种, 包括: 食肉目鬣狗科的卓美傍鬣狗(Adcrocuta eximia)、翁氏鬣形鼬鬣狗(Hyaenictitherium wongii); 奇蹄目马科的福氏三趾马 (Hipparion forstenae)、犀科的哈氏大唇犀(Chilotherium habereri); 偶蹄目猪科的斯氏弓颌猪(Chleuastochoerus stehlini); 长颈鹿科的小齿古麟(Palaeotragus microdon)、中华萨摩麟(Samotherium sinense)、牛科的保德?瞪羚 (Gazella paotehensis?)和稀羚?未定种(Sporadotragus ? sp.), 以上属种是灵台地区三趾马动物群的首次报道。通过对比动物群构成显示时代为晚中新世保德期, 与山西保德、甘肃庆阳等经典保德期动物群接近。通过分析化石物种生态习性组合, 反映了保德期包括甘肃陇东地区一种类似萨瓦纳动物群的开阔生态环境。该发现对重建中国的三趾马动物群及该时期的生态环境提供了线索。

We report the discovery of a Late Miocene mammalian fauna from the Baode Formation at the Dongmen fossil site, Liangyuan Township, Lingtai County, Pingliang City, Gansu Province, China. The Dongmen assemblage comprises nine species representing nine genera within six families, including: Carnivora (Hyaenidae: Adcrocuta eximia, Hyaenictitherium wongii); Perissodactyla (Equidae: Hipparion forstenae; Rhinocerotidae: Chilotherium habereri); and Artiodactyla (Suidae: Chleuastochoerus stehlini; Giraffidae: Palaeotragus microdon, Samotherium sinense; Bovidae: Gazella paotehensis?, Sporadotragus? sp.). This represents the first documented Hipparion fauna from the Lingtai region. The Dongmen mammalian assemblage closely resembles the faunas from Baode, Shansi Province, and Qingyang, Gansu Province, indicating a Baodean age within the Late Miocene. The taxonomic composition suggests an open grassland ecosystem in northern China, including the Longdong region, during the Baodean. This discovery provides valuable evidence for reconstructing and refining our understanding of the Chinese Hipparion faunas and their paleoenvironmental context during this time.

国家重点研发计划项目(2023YFF0804501)、国家自然科学基金项目(42402025、42472004、42430207)、2022年甘肃省第二批矿产资源与古生物化石保护项目(甘资字[2022]109 号)、2024年甘肃省矿产资源与古生物化石保护项目(甘资字[2024]53号)联合资助