• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Rivista Italiana di Paleontologia e Stratigrafia >Early ladinian radiolarian fauna from the Monte San Giorgio (Southern Alps, Switzerland): Systematic, biostratigraphy and paleo(bio)Geographic implications
【24h】

Early ladinian radiolarian fauna from the Monte San Giorgio (Southern Alps, Switzerland): Systematic, biostratigraphy and paleo(bio)Geographic implications

机译：Monte San Giorgio（瑞士南阿尔卑斯山）的早期拉丁放射虫动物区系：系统的，生物地层学和古生物的地理意义

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A well-preserved radiolarian fauna was recovered from the lower part of the San Giorgio Dolomite (Monte San Giorgio, UNESCO WHL, Switzerland), belonging to the Eoprotrachyceras curionii Ammonoid Zone (earliest Ladinian). The depositional environment, consisting of an intraplatform basin with restricted circulation, seemingly resulted in unusual radiolarian assemblages displaying neglegible percentages and very low diversity of Nassellaria. Seventy-three species have been identified and seven new species have been described: Eptingium danieli n. sp., Eptingium neriae n. sp., Parentactinosphaera eoladinica n. sp., Sepsagon ticitiensis n. sp., Sepsagon? valporinae n. sp., Novamuria wirzi n. sp. and Pessagnollum? hexaspinosum n. sp. The taxonomie status of the recovered species has been reassessed and four new genera have been introduced: Bernoulliclla gen. n., Eohexastylus gen. n., Ticinosphaera gen. n. and Lahmosphaera gen. n. The new radiolarian assemblages, the first so far described from the Monte San Giorgio, supplement further information to the taxa occurring in the uppermost Ladinocampe multiperforata Radiolarian Zone, as yet poorly defined, also confirming the absence of major changes in the radiolarian fauna across the Anisian/Ladinian boundary. The widespread co-occurrence of taxa doubtlessly testifies to the existence, in early Ladinian times, of open-marine connections between the basin of the Monte San Giorgio and the pelagic "Buchenstein" basins of the central and eastern South-Alpine domain and farther afield across the Tethys.
机译：从圣乔治白云岩的下部（蒙特圣乔治，联合国教科文组织世界人道主义峰会，瑞士），发现了保存完好的放射虫动物区系，属于Eoprotrachyceras curionii Ammonoid区（最早的拉丁尼亚）。沉积环境由环流受限的平台内盆地组成，似乎导致了不寻常的放射虫组合，其百分数可忽略不计，并且鼻虫的多样性非常低。已鉴定出73种，并描述了7种新种。 sp。，Eptingium neriae n。 sp。，Parentactinosphaera eoladinica n。 sp。，Sepsagon ticitiensis n。 sp。，Sepsagon？ valporinae sp。，Novamuria wirzi n。 sp。和Pessagnollum？ hexaspinosum sp。重新评估了恢复物种的分类学地位，并引入了四个新属：伯努利卡氏菌。 n。，Eohexastylus gen。 n。，Ticinosphaera gen。 。和Lahmosphaera gen。 。新的放射虫组合是迄今为止从蒙特圣乔治（Monte San Giorgio）所描述的第一个放射状组合，补充了发生在最上层的Ladinocampe multiperforata放射虫区域中的分类单元的进一步信息，但尚未明确，这也证实了整个Anisian放射虫动物群没有发生重大变化。 /拉丁美洲边界。广泛的共生类群无疑证明了在拉丁早期，Monte San Giorgio盆地与中，南阿尔卑斯山脉东部中上层“ Buchenstein”盆地之间以及更远的领域之间存在开放的海洋联系。穿越特提斯山脉。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号