陕南张家沟剖面寒武纪早期微体化石Olivooides multisulcatus的新材料

NEW MATERIALS OF EARLY CAMBRIAN MICROFOSSILS OLIVOOIDES MULTISULCATUS FROM ZHANGJIAGOU SECTION IN SOUTHERN SHAANXI

陕南西乡张家沟剖面寒武系下部统宽川铺组发现了大量特异埋藏化石,这些珍贵化石为三维磷酸盐化精美保存,在探索早期生命起源与演化方面意义重大,也是早寒武世前三叶虫时代生物地层对比的重要依据。本文主要对其中一类保存有软躯体的特异埋藏Olivooides multisulcatus Qian,1977进行描记,该类化石1977年曾在陕西宁强宽川铺生物群首次报道,与本文描记的化石类型相同,产地不同,因而具有地层对比意义。根据在西乡生物群发现的新材料,与Olivooides multisulcatus进行特征对比,对属征及种内变异特征进行了补充。

Many fossils of Lagerst/itte is found from the Kuanchuanpu Formation of lower Cambrian in Zhangjiagou section, Xixiang, Shaanxi Province. The precious three-dimensionally phosphatized specimens have important research meaning for the origin and evolution of early life. And it is the basis for biostratigraphic comparison at the pre-trilobites-era of early Cambrian. This paper mainly describesLagerstfitte and soft-bodied Olivooides multisulcatus Qian, 1977. This type of fossil was first reported in Kuanchuanpu Biota in Ningqiang, Shaanxi in 1977, which is the same type as fossils described in this article but from different places, thus it has important research meaning to the stratigraphic correlation. According to new discoveries in Xixiang Biota, this paper compares and adds the characteristics and intraspecific variation of Olivooides multisulcatus Qian, 1977.