Fig. 2.
Ancestral state reconstruction of PRM2 and TNP2 presence. Ancestral nodes across the phylogeny from TimeTree (http://www.timetree.org) were numbered, with pie charts showing the likelihood of loss or retention of intact PRM2 and TNP2. Outer ring represent species with completely descended testis (CDT), incompletely descended testis (IDT), and undescended testis (UDT), respectively.