Fig. 3.

Ancestral state reconstructions of gekkotan sex determining mechanisms using parsimony. Phylogeny was reconstructed using the supertree method from 7 published phylogenies. Species were assigned to 3 sex determining mechanisms: Temperature dependent sex determination (TSD), male heterogamety (XY), and female heterogamety (ZW). The ancestral condition of the outgroup was coded as a different character state in each of 3 analyses. Polymorphic states are shown as multi-colored circles. Coleonyx and Paroedura are shown in bold. These 2 genera were coded as either ZW or XY and their sex determining mechanisms were estimated as part of the analysis.