HYOLITHS OF THE LOWER CAMBRIAN CHIUNGCHUSSUAN STAGE IN SOUTH SHAANXI PROVINCE

This paper deals with the hyoliths from the Lower Cambrian Chiungchussuan Stage of Southern Shaanxi. 6 genera and 8 species have been described, including 5 new genus, 7 new species and one comparable species. Based on the analysis of assemblage features and shell structures, it is possible to distinguish it from the hyoliths assemblage of the Meishucunian Stage. The fauna considered here is characterized not only by larger shells, ventral and dorsal features of shells, apertural lips and operculum co occurred with cones, but also by higher diversity. So it is an important useful evidence for study of the early evolution of hyoliths and biostratigraphic correlation of the Lower Cambrian.

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Clc Number:

Q915.817