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１９９９年，作者收到王元青博士转来胡长康老师未研究的一批哺乳动物化石。这些化石由山东省博物馆工作人员采自山东宁阳县伏山的裂隙堆积物中。根据化石围岩判断这批化石可归入同一动物群。该动物群包含１２种：松鼠科１种（Ｓｃｉｕｒｏｔａｍｉａｓ ｓｐ．），兔科２种（Ｂｒｅｖｉｌａｇｕｓ ｂｒａｃｈｙｐｕｓ，Ｌｅｐｕｓ ｓｐ．），食肉目５种（Ｐａｃｈｙｃｒｏｃｕｔａ ｐｅｒｒｉｅｒｉ，Ｎｙｃｔｅｒｅｕｔｅｓ ｓｉｎｅｎｓｉｓ，Ｃａｎｉｓ ｖａｒｉａｂｉｌｉｓ， Ｈｏｍｏｔｈｅｒｉｕｍ ｓｐ．和Ｍｅｌｅｓ ｓｐ．），牛科２种（Ｇａｚｅｌｌａ ｓｐ．， Ｏｖｉｂｏｖｉｎａｅ ｇｅｎ ｅｔｓｐ．ｉｎｄｅｔ．），鹿科２种（Ｃｅｒｖｕｓ ｓｐ．，Ｃｅｒｖｉｄａｅ ｇｅｎ ｅｔ ｓｐ．ｉｎｄｅｔ．）。其中，Ｐａｃｈｙｃｒｏｃｕｔａ ｐｅｒｒｉｅｒｉ个体明显小于桑氏鬣狗（Ｐａｃｈｙｃｒｏｃｕｔａ ｌｉｃｅｎｔｉ），ｐ２后附尖较发育，ｐ４前附尖高，ｍｌ三角座窄。四川巫山原鉴定为桑氏鬣狗的标本中至少有一件下颌骨（重庆自然博物馆，ＣＶ８７７）应当归入此种。Ｍｅｌｅｓ ｓｐ．具有较周口店第１８点发现的Ｍｅｌｅｓ ｃｈｉａｉ及中更新世常见的Ｍｅｌｅｓ ｍｅｌ?
In 1999, the author received a batch of mammalian fossils that Dr. Wang Yuanqing transferred to Hu Changkang without studying. These fossils were collected from crevices of volcanic rocks in Ningyang County, Shandong Province by staff members of Shandong Provincial Museum. According to fossil rock to determine these fossils can be grouped into the same fauna. The animal population contains 12 species: Sciurotamias sp., Brevilagus brachypus (Lepus sp.), Pachycrocuta perrieri (Nyctereutes sinensis, Canis variabilis, Homotherium sp. And Meles sp .), Gazella sp., Ovibovinae gen etsp. Indet., Cervus sp., Cervidae gen et sp.indet. Among them, Pachycrocuta perrieri was significantly smaller than Pachycrocuta licenti (Pachycrocuta licenti), with more developed apical p2, higher apical ap4, and narrower triangle of ml. At least one mandible (Chongqing Natural History Museum, CV877) was identified as a specimen of Sansheng Hyena in Wushan County, Sichuan Province. Meles sp. Meles chiai found at 18th of Zhoukoudian and Meles mel in the middle Pleistocene