Hybridization of Two Megacephalic Map Turtles (Testudines: Emydidae: Graptemys) in the Choctawhatchee River Drainage of Alabama and Florida

摘要: Map turtles of the genus Graptemys are highly aquatic and rarely undergo terrestrial movements, limited dispersal among drainages has been hypothesized to drive drainage-specific endemism high species richness this group in southeastern United States. Until recently, two members megacephalic “pulchra clade,” barbouri ernsti, were presumed be allopatric with a gap both species' ranges Choctawhatchee River drainage. In paper, we analyzed variation morphology (head shell patterns) genetics (mitochondrial DNA microsatellite loci) from G. barbouri, sp. collected drainage, document syntopic occurrence those back-crossed individuals mixed ancestry Our results provide first counter-example pattern Graptemys. Geologic events associated Pliocene Pleistoce...