A new species of Gobiconodon （Triconodonta, Mammalia） and its implication for the age of Jehol Biota

A new species of Gobiconodon is found from the Yixian Formation of western Liaonlng, China. The new taxa,G zofiae sp. nov., has a confluent opening for branches Ⅱand Ⅲ of the trigeminal nerve on the anterior lamina of the petrosal. G zofiae sp. nov. is similar to Repenomamus in having an ossified Meckel‘s cartilage connecting the lower jaws and ear region. The new species, with enlarged I^1/I1, posteriorly located infraorbital foramen and four mental foramina,distinctly differs from the other species of Gobiconodon. The new material indicates that Gobiconodon has four, not five,upper molariforms. The presence of Gobiconodon in Jchol Biota makes it possible to correlate Jehol Biota with faunas in eastern Asia and North America, and suggests the age of the Yixian Formation to be Early Cretaceous.     

水牛头骨骨孔的解剖

运用数码照像技术与生物统计学方法对成年水牛头骨上的主要骨孔进行照像、标识,精确观测了19只成年水牛头骨上以卵圆孔为中心到其它几个骨孔的距离范围,运用平均数和标准差X±S,求得19只成年水牛头骨卵圆孔到眶圆孔的孔距范围为X±S=3.260~2.676,到视神经孔的孔距范围为X±S=6.056~4.592,到筛孔的孔距范围为X±S=9.347~7.643,到蝶腭孔的孔距范围为X±S=11.385-0.991,并对进出头骨骨孔的神经、血管做了说明和归纳,为家畜解剖学教学和读者识别水牛头骨骨孔提供了较精确的参照.     

成都地区现代人面颅特征

本文对182例成都地区出土的现代人颅骨,进行了24项面颅测量.测量值按性别分组,统计了各测量项目平均数、标准差和性别间差异显著性检验的“t”值.并分别与国人有关资料进行了比较分析.结果表明成都地区现代人面颅特征确系长江以北的北部类型;但又与秦岭准河以北地区人的面颅特征存在较大差异.     

Late Pleistocene human skull from Jingchuan,Gansu Province

Jingchuan human fossil, found in Gansu Province in 1976, was given a preliminary report in 1984, but questions remained con- cerning the age and character of the fossil. We conducted field investigation at Jingchuan in May of 2006 to examine the stratum yielding the human fossil and to obtain sediment samples for optically stimulated luminescence (OSL) dating. Three samples collected from different stratigraphic levels at the fossil locality yielded OSL dates of 15, 48 and 7.9 thousand years ago (ka), respe...     

“许昌人”头盖骨：现代人类起源再诠释？——“许昌人”头盖骨对国际学术界的挑战

“许昌人”头盖骨的发现,印证了“多地区起源”及人类连续进化附带杂交模式学说的正确性,面对“许昌人”头盖骨,“非洲夏娃说”、“代替说”等不攻自破。“许昌人”不仅可能是北京猿人的后代,同时还应是现代中国人的祖先。同时“许昌人”头盖骨的发现在人类学研究领域对DNA的科学证明提出了严峻挑战。它以事实提醒我们,面对现代人类多源说的实证资料,在人类学、考古学和基因科学诸多学术研究领域里调整学术思路势在必然。