Paraceraterium sui sp.nov. is represented by a lower jaw collected at Loc.20004 (46°35.779′N , 87°43.818′E) of Saerduoyila, Halamagai Village, Fuhai County, Xinjiang Uygur Autonomous Region. The new specie...Paraceraterium sui sp.nov. is represented by a lower jaw collected at Loc.20004 (46°35.779′N , 87°43.818′E) of Saerduoyila, Halamagai Village, Fuhai County, Xinjiang Uygur Autonomous Region. The new species is similar to the type species of the genus, P. bugtiense , in general morphology of the mandible and teeth, but differs from the latter in larger size, the proportionally deeper horizontal ramus, the more anteroventrally curved symphysis and the much deeper trenched dorsal surface of symphysis. The associated small mammals indicates an age of Late Oligocene. The occurrence of Para ceratherium sui demonstrates that the genus Paraceratherium erected by Forster Cooper, based on the lower jaw from Pakistan, is a valid taxon different from Indricotherium .展开更多
记述了新疆准噶尔盆地早中新世地层中发现的众古仓鼠类化石。材料采集于索索泉组的两个地点,古地磁年龄介于21.9~21.16Ma之间。这是迄今为止中亚和东亚地区众古仓鼠的最早记录。材料可以归入两个种:苏氏众古仓鼠(新种)Democricetodon s...记述了新疆准噶尔盆地早中新世地层中发现的众古仓鼠类化石。材料采集于索索泉组的两个地点,古地磁年龄介于21.9~21.16Ma之间。这是迄今为止中亚和东亚地区众古仓鼠的最早记录。材料可以归入两个种:苏氏众古仓鼠(新种)Democricetodon sui sp.nov.和众古仓鼠未定种Democricetodon?sp.,该未定种材料很少,不足以准确分类。与早中新世其他仓鼠的比较及对稀古仓鼠Spanocricetodon模式种的重新观察表明,苏氏众古仓鼠是中亚地区谢家期的指示性化石,李传夔(1977)所定义的稀古仓鼠为一个有效属,与Democricetodon和Primus属有明显区别;以前归入稀古仓鼠的某些种类应归入其他属。苏氏众古仓鼠与同一地区晚渐新世的Eucricetodon aff.E.caducus形态明显不同,表明它可能不是起源于该地区的古近纪仓鼠,而是迁移至中亚的外来种。展开更多
基金supported by grants from the Knowledge Innovation Program of the Chinese Academy of Sciences(KZCX2-YW-120)the Chinese National Natural Science Foundation(40472022)~~
文摘Paraceraterium sui sp.nov. is represented by a lower jaw collected at Loc.20004 (46°35.779′N , 87°43.818′E) of Saerduoyila, Halamagai Village, Fuhai County, Xinjiang Uygur Autonomous Region. The new species is similar to the type species of the genus, P. bugtiense , in general morphology of the mandible and teeth, but differs from the latter in larger size, the proportionally deeper horizontal ramus, the more anteroventrally curved symphysis and the much deeper trenched dorsal surface of symphysis. The associated small mammals indicates an age of Late Oligocene. The occurrence of Para ceratherium sui demonstrates that the genus Paraceratherium erected by Forster Cooper, based on the lower jaw from Pakistan, is a valid taxon different from Indricotherium .
基金supported by the Major Basic Research Projects of MST of China(2006CB806400)the Basic Work Program of MST of China(2006FY120300-15)the National Natural Science Foundation of China(40532010)~~
基金supported by grants from the National Basic Research Program of China(2012CB821904)the Chinese National Natural Science Foundation(40672009,40872032)~~
文摘记述了新疆准噶尔盆地早中新世地层中发现的众古仓鼠类化石。材料采集于索索泉组的两个地点,古地磁年龄介于21.9~21.16Ma之间。这是迄今为止中亚和东亚地区众古仓鼠的最早记录。材料可以归入两个种:苏氏众古仓鼠(新种)Democricetodon sui sp.nov.和众古仓鼠未定种Democricetodon?sp.,该未定种材料很少,不足以准确分类。与早中新世其他仓鼠的比较及对稀古仓鼠Spanocricetodon模式种的重新观察表明,苏氏众古仓鼠是中亚地区谢家期的指示性化石,李传夔(1977)所定义的稀古仓鼠为一个有效属,与Democricetodon和Primus属有明显区别;以前归入稀古仓鼠的某些种类应归入其他属。苏氏众古仓鼠与同一地区晚渐新世的Eucricetodon aff.E.caducus形态明显不同,表明它可能不是起源于该地区的古近纪仓鼠,而是迁移至中亚的外来种。
基金the Chinese Academy of Sciences (Grant No.KZCX2-EW-106),Special Fund for Fossil Excavation and Preparation of Chinese Academy of Sciencesthe National Basic Research Program of China(Grant No.2012CB821900)the Nationa lNatural Science Foundation of China(GrantNo.40532010)~~