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首次在山东馒头组上部发现徐庄期三叶虫Sinopagetiajinnanensis带和Sunaspis laevis-Sunaspidella rara带,其中Sunaspis laevis-Sunaspidella rara带从馒头组上部延伸到张夏组底部,也是迄今为止所发现的张夏组在华北地区最低层位。文中共描述三叶虫3目,10科,15属(亚属),14种,5未定种,1未定属种,其中有5新种:Sestrostega cylindricasp.nov.,Pseudinouyia shiliuyuanensis sp.nov.,Erratojincella?decorasp.nov.,Iranoleesia(Proasaphiscina?)subconicasp.nov.,Shanxiella(Shanxiella)latilimbatasp.nov.,对于华北地区与国内外同期地层对比及三叶虫的分类和系统演化具有重要意义。
The Sinopagetiajinnanensis belt and the Sunaspis laevis-Sunaspidella rara belt of the Xuzhuang trilobite were found in the upper part of the Shandong bread group for the first time. The Sunaspis laevis-Sunaspidella rara belt extends from the upper part of the bread group to the bottom of Zhangxia group and is also the Zhangxia group At the lowest level in North China. The article describes trilobites 3 orders, 10 families, 15 genera (subgenus), 14 species, 5 undetermined species, 1 undetermined species, of which 5 new species: Sestrostega cylindricasp.nov., Pseudinouyia shiliuyuanensis sp.nov., Erratojincella? Decorasp.nov., Iranoleesia (Proasaphiscina?) Subconicasp.nov., Shanxiella (Shanxiella) latilimbatasp.nov. Is of great significance to the stratigraphic correlation and the classification and phylogeny of trilobite in North China.