Fig. 4
From: Rapid divergence of a gamete recognition gene promoted macroevolution of Eutheria
Phylogenetic analysis of Zp2 DNA sequence divergence. Shown is the gene tree constructed by Bayesian analysis of 132 aligned Zp2 sequences, with Chinese soft-shelled turtle as outgroup. Red dots denote nodes lacking statistical support (13/131 = 9.9%). Note the supported grouping of Order Perissodactyla with Chiroptera rather than with Cetartiodactyla as in the Zan tree, consistent with ongoing controversy in its phylogenetic placement [88,89,90]