摘要
本文记述巴塘、义敦早石炭世最晚期的Hiroshimaphyllum 动物群和早二叠世晚期的Ira-nophyllum-Ipciphyllum 动物群。这两个动物群的性质不同于我国华南和西南地区同期地层中所见者。文内探讨了形成这两个动物地理区的主要因素。本文共描述早石炭世最晚期的珊瑚5属7种,其中2新属、4新种、2未定种;早二叠世晚期4属4种,其中2新种、1未定种。
The present paper deals with the rugose corals found from the latest Lower Carboniferous Xuchika formation and the Late Lower Permian Bingfeng formation in Batang and Yidun,western Szechuan.The Xuchika formation contains Hiroshima-phyllum,Ozakiphyllum,Amygadalophyllidium and Ramiphyllum with Hiroshimaphyllum as the leading form.It deserves to be mentioned that Hiroshimaphyllum was previously recorded only from the early Namurian in southwestern Japan,but unseen in this country.The Bingfeng formation yields a coral fauna of western Tethys called as the Iranophyllum-Ipciphyllum fauna,which,so far as known,includes Wentzelella,Wentzelellites,Wenzelloides(Wentzelloides),W.(Multimurinus),Waagenophyllum,Yokoyamaella(Yakoyamaella),Praewentzelella,Thomasiphyllum and Laophyllum.Both the faunas are,however,quite different in assemblage from those in the contemporaneous deposits in southwest and southeast China.It seems that the distributional pattern of the two faunas must have something to do with the geotectonic condition.The range of the Hiroshimaphyllum fauna is more or less controlled by the eugeosynclinal factor;whereas the distribution of the Iranophyllum-Ipciphyllum fauna seems to be restricted by the fold belts.
作者
吴望始
章炎生
Wu Wang-shi;Zhang Yan-sheng(Nanking Institute of Geology and Paleontology,Academia Sinica;The Third Regional Geological Surveying Team,Geological Bureau of Szechuan)
出处
《古生物学报》
1979年第1期28-43,110-112,共19页
Acta Palaeontologica Sinica
