“The decline in species richness from the equator to the poles is referred to as the latitudinal diversity gradient (LDG). …Terrestrial and marine tetrapod spatial biodiversity patterns were studied using a database of global tetrapod occurrences. Reconstructed terrestrial LDGs contrast strongly with the generally unimodal gradients of today, potentially reflecting high global temperatures and prevailing Pangaean super-monsoonal climate system during the Permo-Triassic.” Excited about the PT tetrapods? Read more!