Figure 2.

Disparity in the oldest estimated dates of intraspecific diversification events within vertebrate species from temperate regions of the northern and southern hemispheres. The figure shows means and standard errors of species ages (millions of years ago) of northern hemisphere versus southern hemisphere vertebrates in each class (Actinopterygii, Amphibia, Aves, Mammalia, and Reptilia).

Tingley and Dubey BMC Evolutionary Biology 2012 12:244   doi:10.1186/1471-2148-12-244
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