古生代的分类和环境稳定性。

Science. 1973 Dec 21;182(4118):1242-3. doi: 10.1126/science.182.4118.1242.

Available paleontological data show no relationship between environmental stress (proximity to the ancient shoreline) and duration of marine benthic macroinvertebrate genera in the Paleozoic. This is contrary to inferences from fossil community lineages, but in accord with genetic and physiological data on living taxa.

现有的古生物学数据表明，古生代海洋底栖大型无脊椎动物属的存在时间与环境压力（靠近古海岸线的程度）之间没有关系。这与化石群落谱系的推断相反，但与现存分类单元的遗传和生理数据一致。