Tree of life 계통도
Evolution of Vertebrate from the Cambrium to the present at a class level as a traditional spindle diagram. The width of the spindle represents the number of families as a rough estimate of diversity. The diagram is based on Benton, M. J. (1998) The quality of the fossil record of vertebrates. P. 269?303, in Donovan, S. K. and Paul, C. R. C. (eds), The adequacy of the fossil r..