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Ｅｏｐａｒａｓｔａｆｆｅｌａ素为狄南盆地下石炭系标准地层分类下维宪统地层标志，发育于桂林地区的Ｅｏｐａｒａｓｔａｆｅｌａ与新属Ｐａｌａｅｏｐａｒａｓｔａｆｅｌａ，Ｐｓｅｕｄｏｅｎｄｏｔｈｙｒａ构成早期类演化谱系。本文根据这三个属的分类单位在桂林生态区居群组成、古生态地位及繁殖情况，详细论述了它们的宗谱分支和种系发生的全过程。认为建立在Ｐａｌａｅｏｐａｒａｓｔａｆｅｌａｓｈｉｆｅｎｄｏｎｇｅｎｓｉｓｇｒｏｕｐ的宗谱分支基础上演化产生的Ｅｏｐａｒａｓｔａｆｆｅｌａ早期代表ｒｏｔｕｎｄａＶｄｏｖｅｎｋｏ种群的出现，作为Ｖｉｓｅａｎ下限，并推荐灵川大圩西剖面Ｌｅｖｉｔｕｓｉａ层之下２米的灰岩（Ｆ７）底界作为更新的杜内／维宪统界线位置。
Eoparastaffela is a sign of the Weixian formation stratigraphic classification under the Lower Carboniferous strata in the Di Nan basin. Eoparastafela and the new Palaeoparastafela and Pseudoendothyra, which developed in the Guilin area, constitute the early -like evolutionary pedigree. Based on the population composition, paleoecological status and reproduction of the taxonomic units of these three genera in the ecological zone of Guilin, this paper discusses in detail the whole process of their genealogical branches and phylogenetic relationships. It is considered that the emergence of the early representative of Eoparastaffela based on the genealogical branch of the Palaeoparastafelashifendongensis group, rotunda Vdovenko, appears as the lower limit of Visean and the bottom of the 2-meter limestone (F7) beneath the Levitusia layer of the Lingchuan Daxuxi section is recommended as an updated Dune / Victoria constitutional line location.