海南岛南好地区志留纪软骨鱼类化石的发现及地质意义

本文描述了海南岛南好地区志留纪足赛岭组三段上部首次发现的软骨鱼类化石,认为它的层位介于扬子区志留系同类生物群第1组合(Hunanacanthus-Eosinacanthus)至第2组合(Sinacanthus-Neosinacanthus)之间,并与第2组合带关系密切,其地质时代为志留纪兰多维列世特列奇中期.根据足赛岭组所产软骨鱼类化石及其伴生的腕足类、珊瑚、三叶虫等,认为它们与扬子区及塔里木盆地西北缘同期生物群面貌彼此接近或关系密切.在兰多维列世特列奇中期,可能同属一个生物古地理区.

Discovery of Chondrichthyes and its Geological Significance from the Silurian of the Nanhao Area, Hainan Island

This paper described Chondrichthyes(discovery for the first time) from upper part of the third member of the Zusailing Formation of the Silurian in Nanhao area,Hainan Island.It can be correlation between second asemblage: Sinacanthus-Neosinacanthus asemblage zone and first assemblage:Hunanacanthus-Eosinacanthus in the Yangtze area,which is a part of middle Telychian age of the Llandovery epoch.They are regard as a close affinities with the corresponding period biota in the Yangtze area and Talimu basin region,based on fossils information of the Zusailing Formation including: Chondrichthyes,brochiopods,corals,trilobite and conodonts.They belong in a same Palaeobiographic region at the middle age of the Llandovery epoch.