论文部分内容阅读
湘西北地区的早二叠世早期沉积按岩性分两个组:下部称梁山组,假整合于含Yunnanella、Cyrtospirifer的上泥盆统之上;上部惯称栖霞组,与其上产Cryptos-pirifer、Chusenella的茅口组为连续沉积。栖霞组的生物化石相当丰富,以腕足、珊瑚和(蜓)为主,其中尤以腕足动物最为繁盛。梁山组以植物化石为主,仅顶部产腕足。本文涉及的腕足采自七个地点(图1),其中包括1个新属和5个新种。
The Early Permian sediments in the northwestern part of Hunan Province are divided into two groups according to their lithology. The lower part of the Liangshan Formation is pseudointegrated on the Upper Devonian with Yunnanella and Cyrtospirifer. The upper part is often referred to as the Qixia Formation with the Cryptos-pirifer The Maokou Formation in Chusenella is continuously deposited. Qixia group of fossils are quite rich, with brachiopods, coral and ( 蜓) based, especially in the most brachiopod animals. Liangshan group to plant fossils, only the top of the wrist. This paper deals with the brachiosaur collected from seven sites (Figure 1), including a new genus and five new species.