具分裂繁殖的十字珊瑚类在我国扬子区兰多维列统(Llandovery)分布广泛,属种繁多,有重要的地层意义,但长期以来关于该类群的分类位置及各属的定义和范围各家意见不一。文章应用Q型聚类分析研究十字珊瑚类的分类,提出十字珊瑚亚科可分为7...具分裂繁殖的十字珊瑚类在我国扬子区兰多维列统(Llandovery)分布广泛,属种繁多,有重要的地层意义,但长期以来关于该类群的分类位置及各属的定义和范围各家意见不一。文章应用Q型聚类分析研究十字珊瑚类的分类,提出十字珊瑚亚科可分为7属,即:Stauria Milne-Edwards et Haime,Cystostauria He et Li,Ceriaster Lindstrm,Eostauria He et Li,Paraceriaster Y.X.He,Parastauria He et Li,Massparaseriaster nom.provis.,对7个属分别给予简要定义。文中对十字珊瑚亚科的起源、演化及扩散进行探讨,并分析各属可能的演化亲缘关系。资料表明,最原始最早期的Eostauria属很可能起源于澳大利亚的新南威尔士晚奥陶世的Palaeophyllum的某一种群,后在早兰多维列世晚期扩散到扬子区,在中兰多维列世的爱隆期(Aeronian)迅速繁衍,产生许多新属种,因而扬子区在兰多维列世是十字珊瑚类的演化中心。除少数类群,如:Eostauria,Ceriaster,Stauria在晚兰多维列世或文洛克世(Wenlock)早期分别迁移到中亚地区和欧洲,多数类群在扬子区晚兰多维列世的早、中期因不适应环境巨变而快速衰亡。展开更多
To investigate the chemical constituents of a South China Sea gorgonian Menella sp., the isolation of ingredients was performed by solvent extraction and repeated chromatography on silica gel, Sephadex LH-20 and prepa...To investigate the chemical constituents of a South China Sea gorgonian Menella sp., the isolation of ingredients was performed by solvent extraction and repeated chromatography on silica gel, Sephadex LH-20 and preparative TLC. The structures of isolated compounds were determined by spectroscopic analysis and comparison of 1H and 13C NMR data with those reported inliteratures. Three subergorane sesquiterpenoids and one suberosane sesquiterpenoid were isolated. Their structures were identified as subergorgic acid （1）, subergorgic acid methyl ester （2）, 2β-hydroxyl subergorgic acid methyl ester （3）, and suberosenol A （4）. All compounds were isolated from the genus Menella for the first time.展开更多
文摘具分裂繁殖的十字珊瑚类在我国扬子区兰多维列统(Llandovery)分布广泛,属种繁多,有重要的地层意义,但长期以来关于该类群的分类位置及各属的定义和范围各家意见不一。文章应用Q型聚类分析研究十字珊瑚类的分类,提出十字珊瑚亚科可分为7属,即:Stauria Milne-Edwards et Haime,Cystostauria He et Li,Ceriaster Lindstrm,Eostauria He et Li,Paraceriaster Y.X.He,Parastauria He et Li,Massparaseriaster nom.provis.,对7个属分别给予简要定义。文中对十字珊瑚亚科的起源、演化及扩散进行探讨,并分析各属可能的演化亲缘关系。资料表明,最原始最早期的Eostauria属很可能起源于澳大利亚的新南威尔士晚奥陶世的Palaeophyllum的某一种群,后在早兰多维列世晚期扩散到扬子区,在中兰多维列世的爱隆期(Aeronian)迅速繁衍,产生许多新属种,因而扬子区在兰多维列世是十字珊瑚类的演化中心。除少数类群,如:Eostauria,Ceriaster,Stauria在晚兰多维列世或文洛克世(Wenlock)早期分别迁移到中亚地区和欧洲,多数类群在扬子区晚兰多维列世的早、中期因不适应环境巨变而快速衰亡。
基金Post-doctoral Science Foundation of China(Grant No.20080440784)Guangdong Province Natural Science Foundation(Grant No.9451030101003549)
文摘To investigate the chemical constituents of a South China Sea gorgonian Menella sp., the isolation of ingredients was performed by solvent extraction and repeated chromatography on silica gel, Sephadex LH-20 and preparative TLC. The structures of isolated compounds were determined by spectroscopic analysis and comparison of 1H and 13C NMR data with those reported inliteratures. Three subergorane sesquiterpenoids and one suberosane sesquiterpenoid were isolated. Their structures were identified as subergorgic acid （1）, subergorgic acid methyl ester （2）, 2β-hydroxyl subergorgic acid methyl ester （3）, and suberosenol A （4）. All compounds were isolated from the genus Menella for the first time.
