Evolutionary size increase and longevity in Jurassic bivalves and ammonites
Evolutionary size increase and longevity in Jurassic bivalves and ammonites
复制标题
侏罗纪双壳类和菊石的进化尺寸增加和寿命
作者：
A. Hallam
对侏罗纪菊石和双壳类中大小的增长速度与属或种寿命之间关系的研究表明，增长较快的类群灭绝得更快。这些可以随机解释的结果，使得区分两种演化模式成为可能，这两种模式分别涉及尺寸的增加和减少。
A study of the relationship between the rate of increase of size and generic or specific longevity in Jurassic ammonites and bivalves shows that taxa which increase more rapidly become extinct more quickly. The results, which can be interpreted stochastically, make it possible to distinguish two modes of evolution respectively involving an increase and decrease in size.