首页    期刊浏览 2024年11月25日 星期一
登录注册

文章基本信息

  • 标题:A rare comatulid crinoid, Semiometra petitclerci (CAILLET, 1923), from the Upper Oxfordian of Poland
  • 本地全文:下载
  • 作者:Urszula Radwańska
  • 期刊名称:Acta geologica Polonica
  • 印刷版ISSN:0001-5709
  • 出版年度:2007
  • 卷号:57
  • 期号:2
  • 页码:161-167
  • 语种:English
  • 出版社:Institute of Geology, University of Warsaw
  • 摘要:A small faunule of feather stars or comatulids (free-living crinoids of the order Comatulida A.H. CLARK, 1908) is recorded from Upper Oxfordian strata (Bielawy/Wapienno sequence) in the Couiavia region, north-western Central Poland. It represents a single, very small-sized species, Semiometra petitclerci (CAILLET, 1923), hitherto an extreme rarity in the Jurassic sequences of France and Germany. The present record extends the geographic distribution of the species in Europe, to evidence a wider range of the genus Semiometra GISLÉN, 1924, prior to its fairly common occurrence and higher diversity during the Late Cretaceous.
  • 关键词:Crinoidea;Comatulida;Taxonomy;Upper Jurassic;Oxfordian;Poland
国家哲学社会科学文献中心版权所有