NEW MATERIALS OF EARLY CAMBRIAN MICROFOSSILS HEXACONULARIA SICHUANENSISFROM ZHANGJIAGOU SECTION IN SOUTHERN SHAANXI
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Abstract:
A large number of protoconulariid fossils were found in the lower Cambrian strata of Zhangjiagou Section in Xixiang,South Shaanxi.According to its overall morphological and the classification of protoconulariid fossils which belong to Hexaconularia.Predecessors made many classifications about Hexaconularia, but we reclassified it.There are two shallow and discontinuous corner grooves at the central face.This not only enriches the intraspecific characteristics,but also provides the basis for the evolution trend of shell.The same type as fossils described in this article have been reported by predecessors but from different places,thus it has important research meaning to the stratigraphic comparison.
