南京泗洪炭兽的发现及六合组、雨花台组的时代

在南京六合发现一保存较好的下颌骨化石,保存有5枚完整的臼齿。经刘冠邦教授鉴定,认为与他1993年在江苏北部泗洪地区发现的泗洪泗洪炭兽(Sihongotherium sihongense Liu et zhang)相似,但臼齿相对稍小,且齿冠磨损严重,故仅确定为泗洪炭兽未定种(Sihongotherium sp.),时代属中中新世;其照片经邱占祥院士鉴定也认为属炭兽类无疑。炭兽类始于欧、亚始新世中期,渐新世扩展到非洲和北美,到中新世灭绝。炭兽类在我国过去仅分别发现于内蒙、山西、云南的始新世至渐新世地层中,贵州也曾发现两枚臼齿,但时代不祥。由于化石较重要,经在六合实地调查,化石应产于六合组。六合组和雨花组是归于上新世或中新世,一直有争论,故泗洪炭兽在南京六合的发现,为六合组和雨花台组应为中新世提供了新的重要化石依据。

Discovery of Nanjing Sihongotherium sp. and age of Liuhe and Yuhuatai Formations

A well-preserved fragment of fossil mammalian was found in Liuhe Formation in Liuhe District,Nanjing,which was identified as mid-Miocene Sihongotherium sp.by Prof.Liu Guanbang from Nanjing University.The genus Sihongotherium from Sihong County of Jiangsu Province was discovered by Prof.Liu Guanbang and Zhang Chenghua in 1993,they speculated on the belonging of the genus was Anthracotheriidae.According to the known data,there were seven generas including 10 species in the Anthracotheriidae.They were mainly d...