贵州东部下寒武统杷榔组上部的三叶虫

贵州凯里市西北郊瓮岭塘寒武系都匀阶下部(下寒武统)杷榔组顶部和镇远县江古镇杷榔组上部的杷榔动物群,是新近发现的重要动物群。动物群由始海百合与莱德利基虫类三叶虫及多门类的化石组成,表明黔东早寒武世都匀期早期斜坡相生物的多样性。就属种而言,三叶虫类最为丰富,计有4属5种,1亚种和1未定种,包括莱得利基虫类的Redlichia(Pteroredlichia)chinensis,Redlichia(Pteroredlichia)chinensislui,Redlichia(Pteroredlichia)murakamii,耸棒头虫类Arthricocephaluschauveaui,Changaspisplacenta,Changaspismicropyge及褶颊虫类Probowmania(Probowmania)sp.。褶颊虫类Probowmania(Probowmania)的出现,丰富了黔东地区杷榔组上部三叶虫组合,层位明显下延。文章还报道Redlichia(Pteroredlichia)chinensis分节末期到成虫早期个体发育特征。

TRILOBITES OF THE UPPER PART OF LOWER CAMBRIAN BALANG FORMATION, SOUTHEASTERN GUIZHOU PROVINCE, CHINA

Recently, Wu Yishan, a teacher from Kaili No. 4 Middle School, took his students to Wenglingtang to do popular observation of natural science. They found a lots of fossils including trilobites and eocrinoids in gray, gray-greenish silty shale, and calcareous, silty mudstone in the upper part of the Lower Cambrian Balang Formation. Through field detailed investigation, except for numerous trilobite specimens, and (echinoderm) eocrinoids the findings includes bradoriids, large bivalved arthropods, coelenterates, brachiopods, mollusks, and a large number of ichnofossils. It is a fossil assemblage of polyphyla. So, according to the Balang Formation where the fossils were collected, the fossil assemblage is named as the Balang Fauna(Peng Jin et al., 2005).