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本文根据类动物群探讨浙北上下二迭统地层分界及类分带。浙北上二迭统“龙潭组”按层位可分三个类组合。自下而上为:I Neomisellina 组合,ⅡCodonofusiella 组合,ⅢTaihuella(gen.nov.)组合,概略分析各组合特点后指出,Neomisellina 组合应属下二迭统。上下二迭统地层分界应在 Neomisellina 组合与 Codonofusiella 组合之间。并首次建立下二迭统孤峰组上部 Neomisellina 带,上二迭统龙潭组上部 Taihuella 带。厘订后的龙潭组范围为 Palaeofusulina 组合之下,Neomisellina 组合以上,包括 Codonofusiella,Taihuella 两个组合。并描述有关类4属9种,其中1新属6新种。
Based on the fauna, this paper explores the stratigraphic boundaries and zonation of the Upper and Lower Permian in north Zhejiang. North Second Diego on the “Longtan group” by layer can be divided into three categories. Bottom-up: I Neomisellina combination, ⅡCodonofusiella combination, ⅢTaihuella (gen.nov.) Combination, a brief analysis of the characteristics of each combination pointed out that Neomisellina combination should be under the second Diego. Upper and lower Permian stratigraphic boundaries should be between the Neomisellina and Codonofusiella combinations. The first Neomisellina zone in the Upper Permian Gubei Formation and the Upper Taihuella Belt in the Upper Permian Longtan Formation have been established for the first time. After finalizing the range of the Longtan Formation, the combination of Palaeofusulina, Neomisellina and above, including Codonofusiella, Taihuella two combinations. And describes 9 species of 4 genera, of which 1 new genus 6 new species.