化石分类群的理论大小分布：零模型分析
Theoretical size distribution of fossil taxa: analysis of a null model.
作者信息
Reed William J, Hughes Barry D
机构信息
Department of Mathematics and Statistics, University of Victoria, Victoria, British Columbia V8W 3P4, Canada.
出版信息
Theor Biol Med Model. 2007 Mar 22;4:12. doi: 10.1186/1742-4682-4-12.
BACKGROUND
This article deals with the theoretical size distribution (of number of sub-taxa) of a fossil taxon arising from a simple null model of macroevolution.
MODEL
New species arise through speciations occurring independently and at random at a fixed probability rate, while extinctions either occur independently and at random (background extinctions) or cataclysmically. In addition new genera are assumed to arise through speciations of a very radical nature, again assumed to occur independently and at random at a fixed probability rate.
CONCLUSION
The size distributions of the pioneering genus (following a cataclysm) and of derived genera are determined. Also the distribution of the number of genera is considered along with a comparison of the probability of a monospecific genus with that of a monogeneric family.
背景
本文探讨了源于宏观进化简单零模型的化石分类单元（亚分类单元数量）的理论大小分布。
模型
新物种通过以固定概率独立且随机发生的物种形成产生，而灭绝则要么独立且随机发生（背景灭绝），要么以灾难性方式发生。此外，假定新属通过非常激进的物种形成产生，同样假定以固定概率独立且随机发生。
结论
确定了先驱属（在一次灾难之后）和衍生属的大小分布。还考虑了属数量的分布，并将单种属的概率与单属科的概率进行了比较。
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