Fauna characteristics and ecological distribution of Carnivora and Artiodactyla in Niubeiliang Nature Reserve牛背梁自然保护区食肉目和偶蹄目动物的区系特征与生态分布
CARNIVORA FROM MIDDLE MIOCENE OF NORTHERN JUNGGAR BASIN, XINJIANG AUTONOMOUS REGION, CHINA新疆准噶尔盆地北缘中中新世食肉类