江汉盆地西北缘洋溪组锥齿亚洲冠齿兽的发现及其地层意义

THE DISCOVERY OF ASIOCORYPHODON CONICUS IN YANGXI FORMATION ON THE NORTHWEST MARGIN OF JIANGHAN BASIN AND ITS STRATIGRAPHIC SIGNIFICANCE

本文论述了产于江汉盆地西北缘当阳第三系洋溪组冠齿兽类化石的特征,根据下颌骨及牙齿特征定名为锥齿亚洲冠齿兽(相似种)Asiocoryphodon cf.conicus Xu,该种曾见于河南李官桥门陷玉皇顶组,其时代为早始新世中、晚期。

The first discovery of Asiocoryphodonin Yangxi formation on the northwest margin in Dangyang county is described in this paper. According to the lower jaw and tooth character-istics, it is assigned to be Asiocoryphodon cf. conicus Xu. The species was reported from Yuhuangding formation in Liguanqiao sag in Henan province. The age of the species is mid-dle to late early Eocene.