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In this paper, the writer has established eight assemblage zones of these small shelly fossils for the early-middle Early Cambrian, with a discussion on the structural morphology, biological taxonomy, systematic evolution, genetic relationship and stratigraphic significance of these various fossil groups and descriptions of 85 genera (including 8 new genera) and 117 species (including 19 new species) separately belonging to 29 families (including 2 new families), 13 orders (including 2 new orders), 7 classes and 15 various groups, such as Hyolitha, Annelida, Coelenterata, tommotiids, coeleoscleritophorans, Porifera, zhijinitids, chancelloriids, Mollusca, paracarinachitids, Arthropoda, Cyanobactoria, tubular fossils, conodont-like fossils, and globular fossils.

CONTENTS

I. Introdution
II. Key Stratigraphical Sections of the Precambrian-Cambrian Boundary
III. Characteristics of the Early Cambrian Small Shelly Fossils and some Problems of Biostratigraphy
IV. Stratigraphical Correlation of the Early Cambrian and Determination of the Basal Boundary of the Cambrian both in China and Abroad
V. Systematic Palaeontology
VI. References
VII. Explanation of Plates

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