论文部分内容阅读
腕足动物系统古生物研究中,对特征相近的两个分子的比较通常定性且直观,较少进行定量统计分析。判别分析是一种重要的分类分析方法,也是动植物分类的主要统计学基础。劣扭月贝属(Katastrophomena)与扭月贝属(Strophomena)虽分别归于扭月贝科的两个亚科,但它们的特征却很相似,对它们的属征差异各家观点不一致。经过对国内外文献中归于Katastrophomena与Strophomena两属共计31种(其中3个亚种,3个未定种)52个标本(其中7个正型,23个副型,6个亚型,4个选型)进行统计学上的判别分析,建立判别方程并证明其有效性,将两属定量地区分开来,较为科学地明确了它们的属征差异,确证了Katastrophomena属的分类地位。对K.(Costistrophomena)与K.(Katastrophomena)两个亚属的壳线频率进行统计分析,认为两者不存在本质差异,建议将它们合并。
Brachiopods paleontology animal studies, the characteristics of the two molecules are usually more similar qualitative and intuitive, less quantitative statistical analysis. Discriminant analysis is an important classification method and a major statistical basis for the classification of plants and animals. Although both Katastrophomena and Strophomena belong to two subfamilies of Twisted Moon, their characteristics are very similar, and the differences of their attributes are different from each other. A total of 52 species (including 7 positive, 23 subtypes, 6 subtypes, and 4 subtypes) of 31 species (3 subspecies and 3 undetermined species) belonging to Katastrophomena and Strophomena in domestic and foreign literature Type) for statistical discriminant analysis, establishing discriminant equations and proving their validity, the quantitative distinction between the two genera, more scientifically defined their signatures differences, confirming the taxonomic status of Katastrophonia. Statistical analysis of the shell frequencies of two genera, K. (Costistrophomena) and K. (Katastrophomena), suggests that there is no essential difference between them and it is suggested that they be combined.